DYNAMIC ANALYSIS OF ROTOR-BEARING SYSTEM FOR FLEXIBLE BEARING SUPPORT CONDITION

Size: px
Start display at page:

Download "DYNAMIC ANALYSIS OF ROTOR-BEARING SYSTEM FOR FLEXIBLE BEARING SUPPORT CONDITION"

Transcription

1 International Journal of Mechanical Engineering and Technology (IJMET) Volume 8, Issue 7, July 2017, pp , Article ID: IJMET_08_07_197 Available online at ISSN Print: and ISSN Online: IAEME Publication Scopus Indexed DYNAMIC ANALYSIS OF ROTOR-BEARING SYSTEM FOR FLEXIBLE BEARING SUPPORT CONDITION Mr. Sandeep Tiwari M.E. Student, Department of Mechanical Engineering, B.I.T. MESRA, Ranchi, India. Dr. Sankha Bhaduri Assistant Professor, Department of Mechanical Engineering, B.I.T. MESRA, Ranchi, India. ABSTRACT Rotating machineries are rotating at a very high speed. It is therefore very important to determine the natural frequencies of the rotating machineries. In this study, a rotor bearing system is considered to detect the natural frequencies of rotating machineries, where two discs are mounted on the rotor. The purpose of this study is to investigate the effect of boundary conditions on the natural frequencies of the rotor bearing system. The different boundary conditions like rigid, isotropic flexible and orthotropic flexible bearings are considered for the analysis. In this study, a double disc rotor bearing system is analyzed. The finite element model of the rotor bearing system is modeled in ANSYS software. The effect of the spin speed of the spindle on natural frequencies is also observed in this study. The Campbell diagram of the model is also drawn in this paper. It is observed that there is a significant change in the natural frequencies of the model with the variation of the spinning speed of the spindle. Key words: Rotating Machineries, Finite Element Model, Modal Analysis, Natural frequencies, Campbell Diagram, Flexible support. Cite this Article: Mr. Sandeep Tiwari and Dr. Sankha Bhaduri Dynamic Analysis of Rotor-Bearing System for Flexible Bearing Support Condition. International Journal of Mechanical Engineering and Technology, 8(7), 2017, pp INTRODUCTION Rotating machineries such as compressor, turbine, pump, are subjected to vibration while they are rotating at high speed. The major parameters of this unbalance excitation are the eccentricity between the mass center and geometric center, the disc position, the support or the bearing characteristics and spinning speed of the spindle. Rotor dynamics analysis have been performed by different authors in the past. 1 Zhang et al presented a paper on the dynamic behavior of rotor bearing-sfd system with bearing inner-race defect and explained the effect editor@iaeme.com

2 Dynamic Analysis of Rotor-Bearing System for Flexible Bearing Support Condition of SFD on the system stability with the change in speed. 2 Tamrakar and Mittal discussed about the vibration response of cracked rotor with the help of Campbell diagram and the effect of open crack on stiffness and natural frequency of rotor is also discussed in their paper. 3 Navin et al presented a review paper on the static, dynamic and harmonic analysis of rotor bearing system. 5 Jalali et al presented the dynamic behavior of high speed rotor system and suggested the importance of modal analysis in the design and development of rotor system. 6 Fegade et al, with the help of harmonic analysis, identified the frequency of system through critical speed, amplitude and phase angle plot using ANSYS. 7 Surovec et al presented a lateral rotor vibration analysis model, in which they proposed that the lateral vibrations lead to unstable rotor behavior in rotating machinery. 10 Saleem et al presented the paper on detection of unbalance in rotating machines using shaft deflection measurement. 11 Chiu and Chen worked on the coupled vibration in a rotating multi-disc rotor system. 16 Lee and Chun developed an assumed method to investigate the effect of multiple flexible discs on the vibration modes of a flexible rotor system. In this paper, the critical speeds of the rotor have been found out for different types of bearing conditions. Mainly, rigid bearings, flexible isotropic and flexible orthotropic bearing conditions are considered here for the analysis. The natural frequencies of rotor bearing system between different support conditions are compared and the Campbell diagram is plotted for different boundary conditions. 2. METHODOLOGY The methodology consists of two parts, the first part includes Mathematical Modelling, while the second part deals with the Modal Analysis Mathematical Modelling For mathematical modelling of rotor, the simplest rotor model called Jeffcott rotor is considered. It consists of a massless shaft, at the center of which, a fixed rigid circular disc is mounted, which is supported on a pair of rigid bearings. Considering the assumption that the rotor disc does not affect the stiffness of the massless shaft, the stiffness of shaft supported on simple support is given by = 48 where E is the modulus of elasticity of beam, L is length between the two supports, I, is the moment of inertia of shaft and D is the diameter of shaft. = 64 The shaft has a circular cross-section with constant diameter and the disc is mounted with its plane perpendicular to shaft axis. The position of the mass center can be determined from equations: =+Ω (1) =+Ω (2) The equation of motion for the mass center can be derived from Newton s second law (+Ωt) = - ẋ- x (3) (+Ωt) = - "#- " y (4) editor@iaeme.com

3 Mr. Sandeep Tiwari and Dr. Sankha Bhaduri Equation (3) and (4) can be re-written as $ + # + =Ω % cosωt (5) $ + " # + " =Ω % sinωt (6) where m is the mass of the disc, k and C are the stiffness and damping coefficients of the support respectively, e is the eccentricity and is the angular velocity of rotor Analysis Selection of elements The following are the element types used in building the ANSYS Model of rotor-bearing system. BEAM-188: BEAM-188 is a 3-dimensional 2-Node beam element having tension, compression, torsion and bending capabilities. The element has six degrees of freedom at each node: translations in the nodal X, Y and Z directions & rotations about the nodal X, Y and Z axes. MASS-21: MASS-21 is a point element and it is defined by a single node. The degrees of freedom of the element can be extended up to six directions. The element can also be reduced to a 2-D capability. If the element has only one mass input, it is assumed that mass acts in all coordinate directions (MX, MY, MZ). COMBI-214: It is a 2-dimensional spring damper bearing element with longitudinal tension and compression capability. It is defined by two nodes and has two degrees of freedom at each node. The element has stiffness (k) and damping characteristics (c) Finite element Model The properties of test model are given in the table below. Table 1 Model Properties (Taken from [14]) Model Specifications (Disk and shaft are assumed to be of steel) Shaft Disc Length= 1 m Dia.= 0.5 m Dia.=0.05 m Thickness=0.05m E= e+09 N/ % Mass= kg G= 130e+09 N/ % Id= kg- % Density= kg/ Ip= kg- % ANSYS is an important tool used for finite element analysis of rotor editor@iaeme.com

4 Dynamic Analysis of Rotor-Bearing System for Flexible Bearing Support Condition Figure 1 Finite element model of Double Disc rotor Boundary Conditions The shaft nodes are constrained in axial and torsional directions and the base of the bearing nodes are fixed in all directions Modal Analysis A modal analysis of rotor model for flexible bearing support is performed to obtain the mode shapes and corresponding natural frequencies. Flexible Isotropic Bearing support: The shaft is supported on identical undamped isotropic bearings of stiffness = "" =1.75/10 1 3/ Figure 2 First mode shape (flexible support) editor@iaeme.com

5 Mr. Sandeep Tiwari and Dr. Sankha Bhaduri Flexible Orthotropic Bearing support Figure 3 Second mode shape (flexible support) =1.75/10 1 3/ "" =3.5/10 1 3/ Similarly, the modal analysis for orthotropic bearing support is performed and a comparative result of eigen frequencies for different support conditions are tabulated below: Table 2 Natural Frequencies (Result) Bearing supports Natural Frequencies (Hz) Rigid (simple support) Flexible isotropic Flexible orthotropic Campbell Diagram It is a graphical representation between system frequency and excitation frequency as a function of rotational speed. Campbell diagram is usually plotted to determine the critical speed of the rotor-bearing system. In this analysis, the intersection points between the frequency curves and excitation lines are calculated to find out the critical speed editor@iaeme.com

6 Dynamic Analysis of Rotor-Bearing System for Flexible Bearing Support Condition Figure 4 Campbell diagram for flexible isotropic support Figure 5 Campbell diagram for flexible orthotropic support Here, the rotational speed of the rotor is plotted along x-axis and the system frequencies are plotted along y-axis. The above campbell diagrams are plotted for runing the rotor at different speeds. Frequency, of circular whirling motion, when occurs in the same direction of the spin motion, is known as Forward whirling, and when it occurs in the opposite direction, it is known as reverse whirling or Backward whirling. In case of forward whirl, the natural frequency is increasing with the increase in rotational speed while in backward whirl, natural frequency is decreasing as the rotational speed is increasing. 3. RESULTS AND DISCUSSION editor@iaeme.com

7 Mr. Sandeep Tiwari and Dr. Sankha Bhaduri Considering the tabular results of natural frequencies of rotor system supported on flexible bearing, it can be noted that for flexible isotropic and orthotropic conditions, natural frequencies are different due to the difference in stiffness property in either directions. In campbell diagram, it is observed that the frequencies are not constant over the rotational speed range and also each natural frequency of whirl splits into two frequencies forward and backward whirl when rotor is runing above the zero. This behaviour is due to the influence of gyroscopic effect. 4. CONCLUSION From the modal analysis of rotor-bearing system, it is observed that the dynamic behavior of rotor-bearing system is affected by the support conditions i.e. when the support is changed from rigid to flexible isotropic, the natural frequency of the system decreases and also in case of flexible orthotropic bearing condition, there is change in natural frequency of system due to difference in stiffness in two mutually perpendicular directions. From Campbell diagram, the effect of change in spin on critical speed of rotor is observed. So, for stable operation of rotating machines, this type of analysis is important. REFERENCES [1] Zhang, J., Lu, X., Liu, J., Ma, L. and Wang, J. (2017) Dynamic Analysis of a Rotor Bearing-SFD system with the Bearing Inner-race Defect, Shock and Vibration, Vol. 2017, Pp. 13. [2] Tamrakar, R., and Mittal, N.D. (2016) Campbell Diagram Analysis of Open Cracked Rotor, Engineering Solid Mechanics, Vol. 4, Pp [3] Kumar, N.M., Kishore, S., Kumar, R., Sugumar, K., Kumar, S. and Kumar S. (2016) Rotordynamic Analysis of a Rotating System, International Conference on Systems, Science, Control, Communication, Engineering and Technology, Vol. 2, Pp [4] Yamamoto, G.K., Costa, C. and Sousa, J.S.S. (2016) A smart experimental setup for vibration measurement and imbalance fault detection in rotating machinery, Case Studies in Mechanical Systems and Signal Processing, Vol. 4. [5] Jalali, M.H., Ghayour, M., Ziaei-Rad, S. and Shahriari, B. (2014) Dynamic Analysis of High Speed Rotor-Bearing System, Measurement, Vol. 53, Pp [6] Fegade, R., Patel, V., Nehete, R.S. and Bhandarkar, B.M. (2014) Unbalanced response of rotor using ANSYS parametric design for different bearings, International Journal of Engineering Sciences and Emerging Technologies, Vol. 7, Iss. 1, Pp [7] Surovec, R., Bocko, J. and Sarlosi, J. (2014) Lateral Rotor Analysis Model, American Journal of Mechanical Engineering, Vol. 2 [8] Ranjan, A., Kochupillai, J., Shijukumar, P.K. and Shajan, S. (2014) Dynamic Analysis of Unbalance in Rotating Machinery, International Journal of Scientific and Engineering Research, Vol. 5, Iss.7. [9] Das, S.K. (2013) Study of Flexural Behaviour of Jeffcott Rotor, NIT Rourkela. [10] Saleem, M.A., Diwakar, G. and Satyanarayana, M.R.S. (2012) Detection of Unbalance in Rotating Machines using Shaft Deflection measurement during its operation, IOSR Journal of Mechanical and Civil Engineering, Vol. 3, Iss. 3, Pp [11] Chiu, Y.J. and ZenChen D. (2011) The Coupled Vibration in a Rotating Multi-Disk Rotor System, International Journal of Mechanical Sciences, Vol. 53. [12] YUNLU, L.I. (2007) Modelling and performance investigation of a rotor with dissimilar bearing support system, Shenyang Institute of Technology, China. [13] Penny, J.E.T., Friswell, M.I., Less, A.W. and Garvey, S.D. (2004) A Simple but Versatile Rotor Model, IMechE Conference transactions editor@iaeme.com

8 Dynamic Analysis of Rotor-Bearing System for Flexible Bearing Support Condition [14] Gunter, E.J. (2004) Critical Speed Analysis of offset Jeffcott Rotor, RODYN Vibration Inc. [15] Loparo, K.A., Adams, M.L., Lin, W., Magied, M.F and Afshari, N (2000) Fault Detection and Diagnosis of Rotating Machinery, IEEE Transactions on industrial electronics, Vol. 47. [16] Lee, C.W. and Chun, S.B. (1998) Vibration Analysis of a Rotor with Multiple Flexible Disks Using Assumed Modes Method, ASME, Vol.120. [17] ANSYS, Help Documentation, Version [18] R. Tiwari, NPTEL Lecture notes, IIT Kharagpur. [19] Arundhati Garad and Prof. V. J. Shinde. A Theoretical Model of Deep Groove Ball Bearing for Predicting the Effect of Localized Defects on Vibrations. International Journal of Mechanical Engineering and Technology, 8(6), 2017, pp editor@iaeme.com

COMPARISON OF RESPONSE TO UNBALANCE OF OVERHUNG ROTOR SYSTEM FOR DIFFERENT SUPPORTS

COMPARISON OF RESPONSE TO UNBALANCE OF OVERHUNG ROTOR SYSTEM FOR DIFFERENT SUPPORTS International Journal of Mechanical Engineering and Technology (IJMET) Volume 8, Issue 3, March 017, pp. 56 65 Article ID: IJMET_08_03_007 Available online at http://www.iaeme.com/ijmet/issues.asp?jtype=ijmet&vtype=8&itype=3

More information

On The Finite Element Modeling Of Turbo Machinery Rotors In Rotor Dynamic Analysis

On The Finite Element Modeling Of Turbo Machinery Rotors In Rotor Dynamic Analysis Proceedings of The Canadian Society for Mechanical Engineering International Congress 2018 CSME International Congress 2018 May 27-30, 2018, Toronto, On, Canada On The Finite Element Modeling Of Turbo

More information

VIBRATION ANALYSIS OF TIE-ROD/TIE-BOLT ROTORS USING FEM

VIBRATION ANALYSIS OF TIE-ROD/TIE-BOLT ROTORS USING FEM VIBRATION ANALYSIS OF TIE-ROD/TIE-BOLT ROTORS USING FEM J. E. Jam, F. Meisami Composite Materials and Technology Center Tehran, IRAN jejaam@gmail.com N. G. Nia Iran Polymer & Petrochemical Institute, Tehran,

More information

Dynamic Analysis of Pelton Turbine and Assembly

Dynamic Analysis of Pelton Turbine and Assembly Dynamic Analysis of Pelton Turbine and Assembly Aman Rajak, Prateek Shrestha, Manoj Rijal, Bishal Pudasaini, Mahesh Chandra Luintel Department of Mechanical Engineering, Central Campus, Pulchowk, Institute

More information

Theory and Practice of Rotor Dynamics Prof. Dr. Rajiv Tiwari Department of Mechanical Engineering Indian Institute of Technology Guwahati

Theory and Practice of Rotor Dynamics Prof. Dr. Rajiv Tiwari Department of Mechanical Engineering Indian Institute of Technology Guwahati Theory and Practice of Rotor Dynamics Prof. Dr. Rajiv Tiwari Department of Mechanical Engineering Indian Institute of Technology Guwahati Module - 2 Simpul Rotors Lecture - 2 Jeffcott Rotor Model In the

More information

This equation of motion may be solved either by differential equation method or by graphical method as discussed below:

This equation of motion may be solved either by differential equation method or by graphical method as discussed below: 2.15. Frequency of Under Damped Forced Vibrations Consider a system consisting of spring, mass and damper as shown in Fig. 22. Let the system is acted upon by an external periodic (i.e. simple harmonic)

More information

Towards Rotordynamic Analysis with COMSOL Multiphysics

Towards Rotordynamic Analysis with COMSOL Multiphysics Towards Rotordynamic Analysis with COMSOL Multiphysics Martin Karlsson *1, and Jean-Claude Luneno 1 1 ÅF Sound & Vibration *Corresponding author: SE-169 99 Stockholm, martin.r.karlsson@afconsult.com Abstract:

More information

SAMCEF For ROTORS. Chapter 1 : Physical Aspects of rotor dynamics. This document is the property of SAMTECH S.A. MEF A, Page 1

SAMCEF For ROTORS. Chapter 1 : Physical Aspects of rotor dynamics. This document is the property of SAMTECH S.A. MEF A, Page 1 SAMCEF For ROTORS Chapter 1 : Physical Aspects of rotor dynamics This document is the property of SAMTECH S.A. MEF 101-01-A, Page 1 Table of Contents rotor dynamics Introduction Rotating parts Gyroscopic

More information

THEORETICAL MODEL DESIGN OF A HIGH MASS MECHANICALLY DAMPED VIBRATIONAL SYSTEM

THEORETICAL MODEL DESIGN OF A HIGH MASS MECHANICALLY DAMPED VIBRATIONAL SYSTEM International Journal of Mechanical Engineering and Technology (IJMET) Volume 8, Issue 9, September 2017, pp. 191 195, Article ID: IJMET_08_09_020 Available online at http://www.iaeme.com/ijmet/issues.asp?jtype=ijmet&vtype=8&itype=9

More information

Effects of Structural Forces on the Dynamic Performance of High Speed Rotating Impellers.

Effects of Structural Forces on the Dynamic Performance of High Speed Rotating Impellers. Effects of Structural Forces on the Dynamic Performance of High Speed Rotating Impellers. G Shenoy 1, B S Shenoy 1 and Raj C Thiagarajan 2 * 1 Dept. of Mechanical & Mfg. Engineering, Manipal Institute

More information

Nonlinear Rolling Element Bearings in MADYN 2000 Version 4.3

Nonlinear Rolling Element Bearings in MADYN 2000 Version 4.3 - 1 - Nonlinear Rolling Element Bearings in MADYN 2000 Version 4.3 In version 4.3 nonlinear rolling element bearings can be considered for transient analyses. The nonlinear forces are calculated with a

More information

Use of Full Spectrum Cascade for Rotor Rub Identification

Use of Full Spectrum Cascade for Rotor Rub Identification Use of Full Spectrum Cascade for Rotor Rub Identification T. H. Patel 1, A. K. Darpe 2 Department of Mechanical Engineering, Indian Institute of Technology, Delhi 110016, India. 1 Research scholar, 2 Assistant

More information

Dept.of Mechanical Engg, Defence Institute of Advanced Technology, Pune. India

Dept.of Mechanical Engg, Defence Institute of Advanced Technology, Pune. India Applied Mechanics and Materials Submitted: 2014-04-23 ISSN: 1662-7482, Vols. 592-594, pp 1084-1088 Revised: 2014-05-16 doi:10.4028/www.scientific.net/amm.592-594.1084 Accepted: 2014-05-19 2014 Trans Tech

More information

EQUIVALENT SINGLE-DEGREE-OF-FREEDOM SYSTEM AND FREE VIBRATION

EQUIVALENT SINGLE-DEGREE-OF-FREEDOM SYSTEM AND FREE VIBRATION 1 EQUIVALENT SINGLE-DEGREE-OF-FREEDOM SYSTEM AND FREE VIBRATION The course on Mechanical Vibration is an important part of the Mechanical Engineering undergraduate curriculum. It is necessary for the development

More information

Modeling and Performance Analysis of a Flywheel Energy Storage System Prince Owusu-Ansah, 1, Hu Yefa, 1, Philip Agyeman, 1 Adam Misbawu 2

Modeling and Performance Analysis of a Flywheel Energy Storage System Prince Owusu-Ansah, 1, Hu Yefa, 1, Philip Agyeman, 1 Adam Misbawu 2 International Conference on Electromechanical Control Technology and Transportation (ICECTT 2015) Modeling and Performance Analysis of a Flywheel Energy Storage System Prince Owusu-Ansah, 1, Hu Yefa, 1,

More information

Misalignment Fault Detection in Dual-rotor System Based on Time Frequency Techniques

Misalignment Fault Detection in Dual-rotor System Based on Time Frequency Techniques Misalignment Fault Detection in Dual-rotor System Based on Time Frequency Techniques Nan-fei Wang, Dong-xiang Jiang *, Te Han State Key Laboratory of Control and Simulation of Power System and Generation

More information

Multi-plane and Multi-phase Unbalance Vibration Response and Coupling Characteristics of Inner and Outer Dual Rotor System

Multi-plane and Multi-phase Unbalance Vibration Response and Coupling Characteristics of Inner and Outer Dual Rotor System International Journal of Smart Engineering, Volume, Issue, 08 Multi-plane and Multi-phase Unbalance Vibration Response and Coupling Characteristics of Inner and Outer Dual Rotor System Gaoshan Wei,, Hao

More information

Effect of an hourglass shaped sleeve on the performance of the fluid dynamic bearings of a HDD spindle motor

Effect of an hourglass shaped sleeve on the performance of the fluid dynamic bearings of a HDD spindle motor DOI 10.1007/s00542-014-2136-5 Technical Paper Effect of an hourglass shaped sleeve on the performance of the fluid dynamic bearings of a HDD spindle motor Jihoon Lee Minho Lee Gunhee Jang Received: 14

More information

VIBRATION-BASED HEALTH MONITORING OF ROTATING SYSTEMS WITH GYROSCOPIC EFFECT

VIBRATION-BASED HEALTH MONITORING OF ROTATING SYSTEMS WITH GYROSCOPIC EFFECT VIBRATION-BASED HEALTH MONITORING OF ROTATING SYSTEMS WITH GYROSCOPIC EFFECT A Thesis presented to the Faculty of California Polytechnic State University, San Luis Obispo In Partial Fulfillment of the

More information

Experimental Identification of Bearing Stiffness in a Rotor Bearing System

Experimental Identification of Bearing Stiffness in a Rotor Bearing System Experimental Identification of Bearing Stiffness in a Rotor Bearing System Sharad Shekhar Palariya, M. Rajasekhar and J. Srinivas Department of Mechanical Engineering, National Institute of Technology

More information

Simulation and Experimental Research on Dynamics of Low-Pressure Rotor System in Turbofan Engine

Simulation and Experimental Research on Dynamics of Low-Pressure Rotor System in Turbofan Engine Simulation and Experimental Research on Dynamics of Low-Pressure Rotor System in Turbofan Engine Shengxiang Li 1, Chengxue Jin 2, Guang Zhao 1*, Zhiliang Xiong 1, Baopeng Xu 1 1. Collaborative Innovation

More information

Rotor Dynamics. By Jaafar Alsalaet Department of Mechanical Engineering College of Engineering University of Basrah

Rotor Dynamics. By Jaafar Alsalaet Department of Mechanical Engineering College of Engineering University of Basrah Rotor Dynamics By Jaafar Alsalaet Department of Mechanical Engineering College of Engineering University of Basrah 1. Introduction and Definitions Rotor Dynamics is the field of science that studies the

More information

Dynamics of Rotor Systems with Clearance and Weak Pedestals in Full Contact

Dynamics of Rotor Systems with Clearance and Weak Pedestals in Full Contact Paper ID No: 23 Dynamics of Rotor Systems with Clearance and Weak Pedestals in Full Contact Dr. Magnus Karlberg 1, Dr. Martin Karlsson 2, Prof. Lennart Karlsson 3 and Ass. Prof. Mats Näsström 4 1 Department

More information

Critical Speed Analysis of Offset Jeffcott Rotor Using English and Metric Units

Critical Speed Analysis of Offset Jeffcott Rotor Using English and Metric Units Dyrobes Rotordynamics Software https://dyrobes.com Critical Speed Analysis of Offset Jeffcott Rotor Using English and Metric Units E. J. Gunter,PhD Fellow ASME February,2004 RODYN Vibration Inc. 1932 Arlington

More information

Dynamics of Machinery

Dynamics of Machinery Dynamics of Machinery Two Mark Questions & Answers Varun B Page 1 Force Analysis 1. Define inertia force. Inertia force is an imaginary force, which when acts upon a rigid body, brings it to an equilibrium

More information

Study of Flexural Behaviour of Jeffcott Rotor

Study of Flexural Behaviour of Jeffcott Rotor Study of Flexural Behaviour of Jeffcott Rotor A Project Report Submitted in the Partial Fulfilment of the Requirements for the Degree of B. Tech. (Mechanical Engineering) By SURAJ KUMAR DAS Roll No. 109ME0367

More information

Dynamic behavior of turbine foundation considering full interaction among facility, structure and soil

Dynamic behavior of turbine foundation considering full interaction among facility, structure and soil Dynamic behavior of turbine foundation considering full interaction among facility, structure and soil Fang Ming Scholl of Civil Engineering, Harbin Institute of Technology, China Wang Tao Institute of

More information

Vibration Analysis Of Cantilever Shaft With Transverse Cracks

Vibration Analysis Of Cantilever Shaft With Transverse Cracks Vibration Analysis Of Cantilever Shaft With Transverse Cracks R.K Behera, D.R.K. Parhi, S.K. Pradhan, and Seelam Naveen Kumar Dept. of Mech Engg. N.I.T., Rourkela,7698 Dept. of Mech. Engg Dept. of Mech.

More information

Centrifugal pumps (Agriculture) unbalance and shaft Dynamic analysis from the experimental data in a rotor system

Centrifugal pumps (Agriculture) unbalance and shaft Dynamic analysis from the experimental data in a rotor system Research Article International Journal of Current Engineering and Technology E-ISSN 77 416, P-ISSN 347-5161 14 INPRESSCO, All Rights Reserved Available at http://inpressco.com/category/ijcet Centrifugal

More information

Theory & Practice of Rotor Dynamics Prof. Rajiv Tiwari Department of Mechanical Engineering Indian Institute of Technology Guwahati

Theory & Practice of Rotor Dynamics Prof. Rajiv Tiwari Department of Mechanical Engineering Indian Institute of Technology Guwahati Theory & Practice of Rotor Dynamics Prof. Rajiv Tiwari Department of Mechanical Engineering Indian Institute of Technology Guwahati Module - 5 Torsional Vibrations Lecture - 4 Transfer Matrix Approach

More information

Breathing mechanism of a cracked rotor subject to non-trivial mass unbalance

Breathing mechanism of a cracked rotor subject to non-trivial mass unbalance Breathing mechanism of a cracked rotor subject to non-trivial mass unbalance Joseph Patrick SPAGNOL 1 ; Helen WU 2 1, 2 University of Western Sydney, Australia ABSTRACT The effects of dynamic loading on

More information

Vibration Dynamics and Control

Vibration Dynamics and Control Giancarlo Genta Vibration Dynamics and Control Spri ringer Contents Series Preface Preface Symbols vii ix xxi Introduction 1 I Dynamics of Linear, Time Invariant, Systems 23 1 Conservative Discrete Vibrating

More information

DESIGN AND ANALYSIS OF VIBRATION AND HARSHNESS CONTROL FOR AUTOMOTIVE STRUCTURES USING FINITE ELEMENT ANALYSIS

DESIGN AND ANALYSIS OF VIBRATION AND HARSHNESS CONTROL FOR AUTOMOTIVE STRUCTURES USING FINITE ELEMENT ANALYSIS International Journal of Civil Engineering and Technology (IJCIET) Volume 8, Issue 10, October 2017, pp. 1364 1370, Article ID: IJCIET_08_10_139 Available online at http://http://www.iaeme.com/ijciet/issues.asp?jtype=ijciet&vtype=8&itype=10

More information

Study on Nonlinear Dynamic Response of an Unbalanced Rotor Supported on Ball Bearing

Study on Nonlinear Dynamic Response of an Unbalanced Rotor Supported on Ball Bearing G. Chen College of Civil Aviation, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P.R.C. e-mail: cgzyx@263.net Study on Nonlinear Dynamic Response of an Unbalanced Rotor Supported

More information

1859. Forced transverse vibration analysis of a Rayleigh double-beam system with a Pasternak middle layer subjected to compressive axial load

1859. Forced transverse vibration analysis of a Rayleigh double-beam system with a Pasternak middle layer subjected to compressive axial load 1859. Forced transverse vibration analysis of a Rayleigh double-beam system with a Pasternak middle layer subjected to compressive axial load Nader Mohammadi 1, Mehrdad Nasirshoaibi 2 Department of Mechanical

More information

Vibration Analysis of Hollow Profiled Shafts

Vibration Analysis of Hollow Profiled Shafts International Journal of Current Engineering and echnology ISSN 77-406 04 INPRESSCO. All Rights Reserved. Available at http://inpressco.com/category/ijcet Research Article Vibration Analysis of Hollow

More information

Graphical User Interface (GUI) for Torsional Vibration Analysis of Rotor Systems Using Holzer and MatLab Techniques

Graphical User Interface (GUI) for Torsional Vibration Analysis of Rotor Systems Using Holzer and MatLab Techniques Basrah Journal for Engineering Sciences, vol. 14, no. 2, 2014 255 Graphical User Interface (GUI) for Torsional Vibration Analysis of Rotor Systems Using Holzer and MatLab Techniques Dr. Ameen Ahmed Nassar

More information

T1 T e c h n i c a l S e c t i o n

T1 T e c h n i c a l S e c t i o n 1.5 Principles of Noise Reduction A good vibration isolation system is reducing vibration transmission through structures and thus, radiation of these vibration into air, thereby reducing noise. There

More information

958. Nonlinear vibration characteristics of a rotor system with pedestal looseness fault under different loading conditions

958. Nonlinear vibration characteristics of a rotor system with pedestal looseness fault under different loading conditions 958. Nonlinear vibration characteristics of a rotor system with pedestal looseness fault under different loading conditions Hui Ma, Jing Huang, Suyan Zhang, Heqiang Niu CONDITIONS. HUI MA, JING HUANG,

More information

Application of Nonlinear Dynamics Tools for Diagnosis of Cracked Rotor Vibration Signatures

Application of Nonlinear Dynamics Tools for Diagnosis of Cracked Rotor Vibration Signatures Application of Nonlinear Dynamics Tools for Diagnosis of Cracked Rotor Vibration Signatures Jery T. Sawicki *, Xi Wu *, Andrew L. Gyekenyesi **, George Y. Baaklini * Cleveland State University, Dept. of

More information

Codal Provisions IS 1893 (Part 1) 2002

Codal Provisions IS 1893 (Part 1) 2002 Abstract Codal Provisions IS 1893 (Part 1) 00 Paresh V. Patel Assistant Professor, Civil Engineering Department, Nirma Institute of Technology, Ahmedabad 38481 In this article codal provisions of IS 1893

More information

Introduction of Rotor Dynamics using Implicit Method in LS-DYNA

Introduction of Rotor Dynamics using Implicit Method in LS-DYNA Introduction of Rotor Dynamics using Implicit Method in LS-DYNA Liping Li 1, Roger Grimes 1, Thomas Borrvall 2 1 Livermore Software Technology Corporation, Livermore, CA, USA 2 DYNAmore Nordic AB, Sweden

More information

The student will experimentally determine the parameters to represent the behavior of a damped oscillatory system of one degree of freedom.

The student will experimentally determine the parameters to represent the behavior of a damped oscillatory system of one degree of freedom. Practice 3 NAME STUDENT ID LAB GROUP PROFESSOR INSTRUCTOR Vibrations of systems of one degree of freedom with damping QUIZ 10% PARTICIPATION & PRESENTATION 5% INVESTIGATION 10% DESIGN PROBLEM 15% CALCULATIONS

More information

Excel Spreadsheet in Mechanical Engineering Technology Education

Excel Spreadsheet in Mechanical Engineering Technology Education Excel Spreadsheet in Mechanical Engineering Technology Education Prof. Ti Lin, Liu Department of Manufacturing & Mechanical Engineering Technology Rochester Institute of Technology, Rochester, NY 14623

More information

NONLINEAR CHARACTERISTICS OF THE PILE-SOIL SYSTEM UNDER VERTICAL VIBRATION

NONLINEAR CHARACTERISTICS OF THE PILE-SOIL SYSTEM UNDER VERTICAL VIBRATION IGC 2009, Guntur, INDIA NONLINEAR CHARACTERISTICS OF THE PILE-SOIL SYSTEM UNDER VERTICAL VIBRATION B. Manna Lecturer, Civil Engineering Department, National Institute of Technology, Rourkela 769008, India.

More information

The Effect of the Shaft Diameter and Torsional Stiffness on the Whirling Speed of the Ship Propeller Shafting System

The Effect of the Shaft Diameter and Torsional Stiffness on the Whirling Speed of the Ship Propeller Shafting System Journal of Mechanical Design and Vibration, 2017, Vol. 5, No. 1, 37-42 Available online at http://pubs.sciepub.com/jmdv/5/1/5 Science and Education Publishing DOI:10.12691/jmdv-5-1-5 The Effect of the

More information

PROJECT 2 DYNAMICS OF MACHINES 41514

PROJECT 2 DYNAMICS OF MACHINES 41514 PROJECT 2 DYNAMICS OF MACHINES 41514 Dynamics of Rotor-Bearing System Lateral Vibrations and Stability Threshold of Rotors Supported On Hydrodynamic Bearing and Ball Bearing. Ilmar Ferreira Santos, Prof.

More information

Theory and Practice of Rotor Dynamics Prof. Rajiv Tiwari Department of Mechanical Engineering Indian Institute of Technology Guwahati

Theory and Practice of Rotor Dynamics Prof. Rajiv Tiwari Department of Mechanical Engineering Indian Institute of Technology Guwahati Theory and Practice of Rotor Dynamics Prof. Rajiv Tiwari Department of Mechanical Engineering Indian Institute of Technology Guwahati Module - 7 Instability in Rotor Systems Lecture - 2 Fluid-Film Bearings

More information

Frequency response analysis of the gear box in a lathe machine using transfer functions

Frequency response analysis of the gear box in a lathe machine using transfer functions International Journal of Scientific and Research Publications, Volume 4, Issue 11, November 2014 1 Frequency response analysis of the gear box in a lathe machine using transfer functions V Suma Priya 1a,

More information

Finite Element Vibration Analysis of a Rotating shaft System with an Open Crack by the harmonic excitation

Finite Element Vibration Analysis of a Rotating shaft System with an Open Crack by the harmonic excitation Finite Element Vibration Analysis of a Rotating shaft System with an Open Crack by the harmonic excitation Nobuhiro NAGATA, Tsuyoshi INOUE, Yukio ISHIDA Deptartment of Mechanical Science and Engineering,

More information

Finite element analysis of rotating structures

Finite element analysis of rotating structures Finite element analysis of rotating structures Dr. Louis Komzsik Chief Numerical Analyst Siemens PLM Software Why do rotor dynamics with FEM? Very complex structures with millions of degrees of freedom

More information

Dynamic Analysis of Rotor-Ball Bearing System of Air Conditioning Motor of Electric Vehicle

Dynamic Analysis of Rotor-Ball Bearing System of Air Conditioning Motor of Electric Vehicle International Journal of Mechanical Engineering and Applications 2015; 3(3-1): 22-28 Published online February 13, 2015 (http://www.sciencepublishinggroup.com/j/ijmea) doi: 10.11648/j.ijmea.s.2015030301.14

More information

1820. Selection of torsional vibration damper based on the results of simulation

1820. Selection of torsional vibration damper based on the results of simulation 8. Selection of torsional vibration damper based on the results of simulation Tomasz Matyja, Bogusław Łazarz Silesian University of Technology, Faculty of Transport, Gliwice, Poland Corresponding author

More information

UNIT-I (FORCE ANALYSIS)

UNIT-I (FORCE ANALYSIS) DHANALAKSHMI SRINIVASAN INSTITUTE OF RESEACH AND TECHNOLOGY DEPARTMENT OF MECHANICAL ENGINEERING QUESTION BANK ME2302 DYNAMICS OF MACHINERY III YEAR/ V SEMESTER UNIT-I (FORCE ANALYSIS) PART-A (2 marks)

More information

DYNAMIC ANALYSIS OF CANTILEVER BEAM

DYNAMIC ANALYSIS OF CANTILEVER BEAM International Journal of Mechanical Engineering and Technology (IJMET) Volume 8, Issue 5, May 2017, pp. 1167 1173, Article ID: IJMET_08_05_122 Available online at http://www.iaeme.com/ijmet/issues.asp?jtype=ijmet&vtype=8&itype=5

More information

Study of coupling between bending and torsional vibration of cracked rotor system supported by radial active magnetic bearings

Study of coupling between bending and torsional vibration of cracked rotor system supported by radial active magnetic bearings Applied and Computational Mechanics 1 (2007) 427-436 Study of coupling between bending and torsional vibration of cracked rotor system supported by radial active magnetic bearings P. Ferfecki a, * a Center

More information

Basics of rotordynamics 2

Basics of rotordynamics 2 Basics of rotordynamics Jeffcott rotor 3 M A O a rigid rotor disk rotates at angular frequency W massless shaft acts as a spring restoring displacements disk can move only in the plane defined by axes

More information

VIBRATION ANALYSIS OF ROTOR - COUPLING - BEARING SYSTEM WITH MISALIGNED SHAFTS

VIBRATION ANALYSIS OF ROTOR - COUPLING - BEARING SYSTEM WITH MISALIGNED SHAFTS - THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS 345 E. 47th St, New York, N.Y. 10017 96-GT-12.. The Society shall not be responsible for statements or opinions advanced in papers or discussion at meetings

More information

Alfa-Tranzit Co., Ltd offers the new DYNAMICS R4.0 program system for analysis and design of rotor systems of high complexity

Alfa-Tranzit Co., Ltd offers the new DYNAMICS R4.0 program system for analysis and design of rotor systems of high complexity ROTORDYNAMICS OF TURBOMACHINERY Alfa-Tranzit Co., Ltd offers the new DYNAMICS R4. program system for analysis and design of rotor systems of high complexity Copyright Alfa-Tranzit Co., Ltd 2-25 e-mail

More information

Cork Institute of Technology. Summer 2007 Mechanics of Machines (Time: 3 Hours)

Cork Institute of Technology. Summer 2007 Mechanics of Machines (Time: 3 Hours) Cork Institute of Technology Bachelor of Engineering (Honours) in Mechanical Engineering- Award Instructions Answer FOUR questions. All questions carry equal marks. (NFQ Level 8) Summer 2007 Mechanics

More information

1415. Effects of different disc locations on oil-film instability in a rotor system

1415. Effects of different disc locations on oil-film instability in a rotor system 1415. Effects of different disc locations on oil-film instability in a rotor system Hui Ma 1, Xueling Wang 2, Heqiang Niu 3, Hui Li 4 School of Mechanical Engineering and Automation, Northeastern University,

More information

Modeling and Vibration analysis of shaft misalignment

Modeling and Vibration analysis of shaft misalignment Volume 114 No. 11 2017, 313-323 ISSN: 1311-8080 (printed version); ISSN: 1314-3395 (on-line version) url: http://www.ijpam.eu ijpam.eu Modeling and Vibration analysis of shaft misalignment Amit. M. Umbrajkaar

More information

1439. Numerical simulation of the magnetic field and electromagnetic vibration analysis of the AC permanent-magnet synchronous motor

1439. Numerical simulation of the magnetic field and electromagnetic vibration analysis of the AC permanent-magnet synchronous motor 1439. Numerical simulation of the magnetic field and electromagnetic vibration analysis of the AC permanent-magnet synchronous motor Bai-zhou Li 1, Yu Wang 2, Qi-chang Zhang 3 1, 2, 3 School of Mechanical

More information

Mechatronics, Electrical Power, and Vehicular Technology

Mechatronics, Electrical Power, and Vehicular Technology Mechatronics, Electrical Power, and Vehicular Technology 05 (2014) 1-8 Mechatronics, Electrical Power, and Vehicular Technology e-issn:2088-6985 p-issn: 2087-3379 Accreditation Number: 432/Akred-LIPI/P2MI-LIPI/04/2012

More information

Kaunadis [5] analyzed the vibration analysis of cantilever beam in free and forced condition. The cantilever beam was loaded at different locations.

Kaunadis [5] analyzed the vibration analysis of cantilever beam in free and forced condition. The cantilever beam was loaded at different locations. Vibration Analysis of Cantilever Beam: An Experimental Study Mr. P.Kumar 1, Dr. S.Bhaduri 2, Dr. A. Kumar 3 1-3 Department of Mechanical Engineering, Birla Institute of Technology Mesra, Jharkhand, India

More information

KNIFE EDGE FLAT ROLLER

KNIFE EDGE FLAT ROLLER EXPERIMENT N0. 1 To Determine jumping speed of cam Equipment: Cam Analysis Machine Aim: To determine jumping speed of Cam Formulae used: Upward inertial force = Wvω 2 /g Downward force = W + Ks For good

More information

Theory & Practice of Rotor Dynamics Prof. Rajiv Tiwari Department of Mechanical Engineering Indian Institute of Technology Guwahati

Theory & Practice of Rotor Dynamics Prof. Rajiv Tiwari Department of Mechanical Engineering Indian Institute of Technology Guwahati Theory & Practice of Rotor Dynamics Prof. Rajiv Tiwari Department of Mechanical Engineering Indian Institute of Technology Guwahati Module - 8 Balancing Lecture - 1 Introduce To Rigid Rotor Balancing Till

More information

FINITE ELEMENT ANALYSIS OF A ROTOR SUPPORTED WITH HYDRODYNAMIC JOURNAL BEARINGS

FINITE ELEMENT ANALYSIS OF A ROTOR SUPPORTED WITH HYDRODYNAMIC JOURNAL BEARINGS FINITE ELEMENT ANALYSIS OF A ROTOR SUPPORTED WITH HYDRODYNAMIC JOURNAL BEARINGS A Project Report Submitted in partial requirements for the degree of Batchelor of Technology in Mechanical Engineering By

More information

Analysis of Non-Linear Machine Tool Dynamic Behaviour

Analysis of Non-Linear Machine Tool Dynamic Behaviour Proceedings of the 5 th Manufacturing Engineering Society International Conference Zaragoza June 13 Analysis of Non-Linear Machine Tool Dynamic Behaviour A. S. Delgado (1), E. Ozturk (), N. Sims (3) (1)

More information

Structural Dynamics Lecture 2. Outline of Lecture 2. Single-Degree-of-Freedom Systems (cont.)

Structural Dynamics Lecture 2. Outline of Lecture 2. Single-Degree-of-Freedom Systems (cont.) Outline of Single-Degree-of-Freedom Systems (cont.) Linear Viscous Damped Eigenvibrations. Logarithmic decrement. Response to Harmonic and Periodic Loads. 1 Single-Degreee-of-Freedom Systems (cont.). Linear

More information

Dynamics of Machinery

Dynamics of Machinery Lab Manual Dynamics of Machinery (2161901) Name: Enrollment No.: Roll No.: Batch: Darshan Institute of Engineering & Technology, Rajkot DEPARTMENT OF MECHANICAL ENGINEERING Certificate This is to certify

More information

Varuvan Vadivelan. Institute of Technology LAB MANUAL. : 2013 : B.E. MECHANICAL ENGINEERING : III Year / V Semester. Regulation Branch Year & Semester

Varuvan Vadivelan. Institute of Technology LAB MANUAL. : 2013 : B.E. MECHANICAL ENGINEERING : III Year / V Semester. Regulation Branch Year & Semester Varuvan Vadivelan Institute of Technology Dharmapuri 636 703 LAB MANUAL Regulation Branch Year & Semester : 2013 : B.E. MECHANICAL ENGINEERING : III Year / V Semester ME 6511 - DYNAMICS LABORATORY GENERAL

More information

IJSRD - International Journal for Scientific Research & Development Vol. 4, Issue 07, 2016 ISSN (online):

IJSRD - International Journal for Scientific Research & Development Vol. 4, Issue 07, 2016 ISSN (online): IJSRD - International Journal for Scientific Research & Development Vol. 4, Issue 07, 2016 ISSN (online): 2321-0613 Analysis of Vibration Transmissibility on a System using Finite Element Analysis Rajesh

More information

Theory and Practice of Rotor Dynamics Prof. Rajiv Tiwari Department of Mechanical Engineering Indian Institute of Technology Guwahati

Theory and Practice of Rotor Dynamics Prof. Rajiv Tiwari Department of Mechanical Engineering Indian Institute of Technology Guwahati Theory and Practice of Rotor Dynamics Prof. Rajiv Tiwari Department of Mechanical Engineering Indian Institute of Technology Guwahati Module - 7 Instability in rotor systems Lecture - 4 Steam Whirl and

More information

Research Article Response of a Warped Flexible Rotor with a Fluid Bearing

Research Article Response of a Warped Flexible Rotor with a Fluid Bearing Hindawi Publishing Corporation International Journal of Rotating Machinery Volume 8, Article ID 753, 9 pages doi:.55/8/753 Research Article Response of a Warped Flexible Rotor with a Fluid Bearing Jim

More information

ROTATING MACHINERY VIBRATION

ROTATING MACHINERY VIBRATION SECOND EDITION ROTATING MACHINERY VIBRATION From Analysis to Troubleshooting MAURICE L. ADAMS, JR Case Western Reserve University Cleveland, Ohio W^ C\ CRC Press У Taylor &. Francis Group Boca Raton London

More information

Influence of electromagnetic stiffness on coupled micro vibrations generated by solar array drive assembly

Influence of electromagnetic stiffness on coupled micro vibrations generated by solar array drive assembly Influence of electromagnetic stiffness on coupled micro vibrations generated by solar array drive assembly Mariyam Sattar 1, Cheng Wei 2, Awais Jalali 3 1, 2 Beihang University of Aeronautics and Astronautics,

More information

Robust shaft design to compensate deformation in the hub press fitting and disk clamping process of 2.5 HDDs

Robust shaft design to compensate deformation in the hub press fitting and disk clamping process of 2.5 HDDs DOI 10.1007/s00542-016-2850-2 TECHNICAL PAPER Robust shaft design to compensate deformation in the hub press fitting and disk clamping process of 2.5 HDDs Bumcho Kim 1,2 Minho Lee 3 Gunhee Jang 3 Received:

More information

3D Finite Element Modeling and Vibration Analysis of Gas Turbine Structural Elements

3D Finite Element Modeling and Vibration Analysis of Gas Turbine Structural Elements 3D Finite Element Modeling and Vibration Analysis of Gas Turbine Structural Elements Alexey I. Borovkov Igor A. Artamonov Computational Mechanics Laboratory, St.Petersburg State Polytechnical University,

More information

VIBRATION CONTROL OF RECTANGULAR CROSS-PLY FRP PLATES USING PZT MATERIALS

VIBRATION CONTROL OF RECTANGULAR CROSS-PLY FRP PLATES USING PZT MATERIALS Journal of Engineering Science and Technology Vol. 12, No. 12 (217) 3398-3411 School of Engineering, Taylor s University VIBRATION CONTROL OF RECTANGULAR CROSS-PLY FRP PLATES USING PZT MATERIALS DILEEP

More information

An Innovative Rotordynamical Model for Coupled Flexural-Torsional Vibrations in Rotating Machines

An Innovative Rotordynamical Model for Coupled Flexural-Torsional Vibrations in Rotating Machines An Innovative Rotordynamical Model for Coupled Flexural-Torsional Vibrations in Rotating Machines Filippo Cangioli, Alice Innocenti, Lorenzo Marini, Enrico Meli, Luca Pugi, and Andrea Rindi Department

More information

Perturbation of periodic equilibrium

Perturbation of periodic equilibrium Perturbation of periodic equilibrium by Arnaud Lazarus A spectral method to solve linear periodically time-varying systems 1 A few history Late 19 th century Emile Léonard Mathieu: Wave equation for an

More information

Vibration Analysis of Multiple Cracked Shaft

Vibration Analysis of Multiple Cracked Shaft International OPEN ACCESS Journal Of Modern Engineering Research (IJMER) Vibration Analysis of Multiple Cracked Shaft Dinesh R. Satpute 1, Milind S. Mhaske 2, Prof. S. B. Belkar 3 1 ( PG Scholar, Pravara

More information

EXPERIMENTAL INVESTIGATION OF THE EFFECTS OF TORSIONAL EXCITATION OF VARIABLE INERTIA EFFECTS IN A MULTI-CYLINDER RECIPROCATING ENGINE

EXPERIMENTAL INVESTIGATION OF THE EFFECTS OF TORSIONAL EXCITATION OF VARIABLE INERTIA EFFECTS IN A MULTI-CYLINDER RECIPROCATING ENGINE International Journal of Mechanical Engineering and Technology (IJMET) Volume 6, Issue 8, Aug 2015, pp. 59-69, Article ID: IJMET_06_08_006 Available online at http://www.iaeme.com/ijmet/issues.asp?jtypeijmet&vtype=6&itype=8

More information

Program System for Machine Dynamics. Abstract. Version 5.0 November 2017

Program System for Machine Dynamics. Abstract. Version 5.0 November 2017 Program System for Machine Dynamics Abstract Version 5.0 November 2017 Ingenieur-Büro Klement Lerchenweg 2 D 65428 Rüsselsheim Phone +49/6142/55951 hd.klement@t-online.de What is MADYN? The program system

More information

ABSTRACT I. INTRODUCTION

ABSTRACT I. INTRODUCTION 2017 IJSRST Volume 3 Issue 2 Print ISSN: 2395-6011 Online ISSN: 2395-602X National Conference on Advances in Engineering and Applied Science (NCAEAS) 16 th February 2017 In association with International

More information

Experimental Investigations of Whirl Speeds of a Rotor on Hydrodynamic Spiral Journal Bearings Under Flooded Lubrication

Experimental Investigations of Whirl Speeds of a Rotor on Hydrodynamic Spiral Journal Bearings Under Flooded Lubrication International Conference on Fluid Dynamics and Thermodynamics Technologies (FDTT ) IPCSIT vol.33() () IACSIT Press, Singapore Experimental Investigations of Whirl Speeds of a Rotor on Hydrodynamic Spiral

More information

Engineering Science OUTCOME 2 - TUTORIAL 3 FREE VIBRATIONS

Engineering Science OUTCOME 2 - TUTORIAL 3 FREE VIBRATIONS Unit 2: Unit code: QCF Level: 4 Credit value: 5 Engineering Science L/60/404 OUTCOME 2 - TUTORIAL 3 FREE VIBRATIONS UNIT CONTENT OUTCOME 2 Be able to determine the behavioural characteristics of elements

More information

Introduction to Continuous Systems. Continuous Systems. Strings, Torsional Rods and Beams.

Introduction to Continuous Systems. Continuous Systems. Strings, Torsional Rods and Beams. Outline of Continuous Systems. Introduction to Continuous Systems. Continuous Systems. Strings, Torsional Rods and Beams. Vibrations of Flexible Strings. Torsional Vibration of Rods. Bernoulli-Euler Beams.

More information

Static Unbalance. Both bearing reactions occur in the same plane and in the. After balancing no bearing reaction remains theoretically.

Static Unbalance. Both bearing reactions occur in the same plane and in the. After balancing no bearing reaction remains theoretically. BALANCING Static Unbalance A disk-shaft system on rigid rails An unbalanced disk-shaft system mounted on bearings and rotated For the unbalanced rotating system: Dynamic Bearing Reactions + Inertia Forces

More information

Introduction to Mechanical Vibration

Introduction to Mechanical Vibration 2103433 Introduction to Mechanical Vibration Nopdanai Ajavakom (NAV) 1 Course Topics Introduction to Vibration What is vibration? Basic concepts of vibration Modeling Linearization Single-Degree-of-Freedom

More information

ANALYSIS AND IDENTIFICATION IN ROTOR-BEARING SYSTEMS

ANALYSIS AND IDENTIFICATION IN ROTOR-BEARING SYSTEMS ANALYSIS AND IDENTIFICATION IN ROTOR-BEARING SYSTEMS A Lecture Notes Developed under the Curriculum Development Scheme of Quality Improvement Programme at IIT Guwahati Sponsored by All India Council of

More information

Dynamic Analysis of An 1150 MW Turbine Generator

Dynamic Analysis of An 1150 MW Turbine Generator Dyrobes Rotordynamics Software https://dyrobes.com 1 PWR2005-50142 Abract Dynamic Analysis of An 1150 MW Turbine Generator Edgar J. Gunter Fellow ASME RODYN Vibration Inc Charlottesville, Va. 22903 DrGunter@aol.com

More information

DYNAMIC CHARACTERSTIC ESTIMATION OF STRUCTURAL MATERIALS BY MODAL ANALYSIS USING ANSYS

DYNAMIC CHARACTERSTIC ESTIMATION OF STRUCTURAL MATERIALS BY MODAL ANALYSIS USING ANSYS DYNAMIC CHARACTERSTIC ESTIMATION OF STRUCTURAL MATERIALS BY MODAL ANALYSIS USING ANSYS Syed Ayesha Yasmeen 1, Anatha Abhijit P 2, Dr.D.Srinivasa Rao 3 1, 2 Graduate Students, 3 Professor, Department of

More information

Mechanical Vibrations Prof. Rajiv Tiwari Department of Mechanical Engineering Indian Institute of Technology, Guwahati

Mechanical Vibrations Prof. Rajiv Tiwari Department of Mechanical Engineering Indian Institute of Technology, Guwahati Mechanical Vibrations Prof. Rajiv Tiwari Department of Mechanical Engineering Indian Institute of Technology, Guwahati Module - 12 Signature analysis and preventive maintenance Lecture - 3 Field balancing

More information

Chapter a. Spring constant, k : The change in the force per unit length change of the spring. b. Coefficient of subgrade reaction, k:

Chapter a. Spring constant, k : The change in the force per unit length change of the spring. b. Coefficient of subgrade reaction, k: Principles of Soil Dynamics 3rd Edition Das SOLUTIONS MANUAL Full clear download (no formatting errors) at: https://testbankreal.com/download/principles-soil-dynamics-3rd-editiondas-solutions-manual/ Chapter

More information

DESIGN AND ANALYSIS OF LIGHT WEIGHT MOTOR VEHICLE FLYWHEEL M.LAVAKUMAR #1, R.PRASANNA SRINIVAS* 2

DESIGN AND ANALYSIS OF LIGHT WEIGHT MOTOR VEHICLE FLYWHEEL M.LAVAKUMAR #1, R.PRASANNA SRINIVAS* 2 International Journal of Computer Trends and Technology (IJCTT) volume 4 Issue 7 July 013 DESIGN AND ANALYSIS OF LIGHT WEIGHT MOTOR VEHICLE FLYWHEEL M.LAVAKUMAR #1, R.PRASANNA SRINIVAS* 1 Assistant Professor

More information

Nonlinear Dynamic Analysis of a Hydrodynamic Journal Bearing Considering the Effect of a Rotating or Stationary Herringbone Groove

Nonlinear Dynamic Analysis of a Hydrodynamic Journal Bearing Considering the Effect of a Rotating or Stationary Herringbone Groove G. H. Jang e-mail: ghjang@hanyang.ac.kr J. W. Yoon PREM, Department of Mechanical Engineering, Hanyang University, Seoul, 133-791, Korea Nonlinear Dynamic Analysis of a Hydrodynamic Journal Bearing Considering

More information

WORK SHEET FOR MEP311

WORK SHEET FOR MEP311 EXPERIMENT II-1A STUDY OF PRESSURE DISTRIBUTIONS IN LUBRICATING OIL FILMS USING MICHELL TILTING PAD APPARATUS OBJECTIVE To study generation of pressure profile along and across the thick fluid film (converging,

More information

892 VIBROENGINEERING. JOURNAL OF VIBROENGINEERING. JUNE VOLUME 15, ISSUE 2. ISSN

892 VIBROENGINEERING. JOURNAL OF VIBROENGINEERING. JUNE VOLUME 15, ISSUE 2. ISSN 1004. Study on dynamical characteristics of misalignrubbing coupling fault dual-disk rotor-bearing system Yang Liu, Xing-Yu Tai, Qian Zhao, Bang-Chun Wen 1004. STUDY ON DYNAMICAL CHARACTERISTICS OF MISALIGN-RUBBING

More information