Nonlinear vibration analysis of steam turbine bladed disk with friction contact between adjacent blades
|
|
- Berniece Hunt
- 5 years ago
- Views:
Transcription
1 Nonlinear vibration analysis of steam turbine bladed disk with friction contact between adjacent blades Josef Voldřich Ukraine, November 2018 Проект Развитие международного сотрудничества с украинскими ВУЗами в областях качества, энергетики и транспорта г. Харьков, 11/2018
2 Степан Прокопович Тимошенко A grand native of Ukraine, the father of modern engineering mechanics. - His portrait, as the only one, has displayed with reverence in my workroom for 20 years. - He was a giant for mathematical modelling of strength problems in mechanical engineering. Encouragement: - Let s not be afraid to use MATHEMATICS for solution of our actual problems. - And it is not inevitable to look up only to commercial FEM software.
3 Content Motivation and introduction Methodology Calculations of nonlinear vibration for bladed disks Contact stiffnesses Conclusions
4 Motivation and introduction Pilsen ( inhabitants): Steam turbines produced by Doosan Škoda Power Ltd. Nuclear reactors WWER for NPPs produced by Škoda JS, Ltd. (25 so far). Well-known for its brewing The world s first-ever pilsner type blond lager, making it the inspiration for much of the beer produced in the world today, many of which are named pils, pilsner and pilsener. The Škoda company (established 1859) was one of the biggest European arms factories up to the WW II. Pilsen
5 Motivation and introduction shroud tie-boss Demand from Doosan Škoda Power Ltd. : Vibration analysis of bladed disk with 66 blades of type LSB48 (1220 mm) 277,269 DOFs
6 Motivation and introduction renovation of steam turbines low-pressure stages in NPP Temelín by Doosan Škoda Power NPP Temelín in south Bohemia Reactor heat power [%] Before modernization LP [MWe] Power rise garanted [MWe] Power rise measured [MWe] , ,8 Turbine room
7 Methodology Modal analysis Eigenvalue problem for the whole bladed disk ω 2 M + K w = 0 K = K 0 K 1 0 K N 1 K 0 K 1 0 K N 1 K K K N 1 K 0 K 1 K N 1 K 0 It is sufficient to consider only a sector with 1 blade the reference sector M = M 0 0 M M Eigenvalue problém for the reference sector: ω 2 M + K 0 + K 1 e ikσ + K N 1 e ikσ v = 0 turbin room M, K 0 : mass and stiffness matrices K 297k DOFs 1, K N 1 : sector-to-sector coupling N : number of blades, σ = 2π N, k : harmoni index (nodal diameter)
8 Methodology Vibration of the reference sector M d2 u t dt 2 + B du t dt + Ku t + f L u t t, u t + f R u t, u t + t = p t Linear part Nonlinear forces between blades (friction contact) Steady-state vibration responce can be represented by Fourier series n n Substituing into the equation we obtain n Excitation forces p t = P c k cos kωt + P s k sin kωt u t = U 0 + U c k cos kωt + U s k sin kωt = U 0 + U k e ikωt + U k e ikωt k=1 k=1 k=1 Z k ω U k + F k U P k = 0, Z k ω = K + ikωb kω 2 M, k = 0,, n Matrix of dynamic stiffnesses for the system without couplings
9 Methodology Nonlinear vibration, Multiharmonic Balance Method 4 important steps for the solution of equation 1) Calculate a multiharmonic FRF matrix of the linear part of the system Z k ω 2) Separate linear and nonlinear degrees of freedom U k = U k ln, U k nln 1 = A k A k = A l n ln k nl n ln A k l n nln A k nl n nln A k 3) Split the equation into linear and nonlinear part m r= iη k,r Ω 2 k,r kω φ H 2 k,r φ k,r Z k ω U k + F k U P k = 0, k = 0,, n U ln l n k + A nln k F nln k U nln A k P k ln = 0 ln U nln nl n k + A nln k F nln k U nln 4) Accomplish effective calculation U nln A k P k nln = 0 nln F k nln U nln using F k U = 0, F k nln U nln
10 Methodology Mathematical model of contacts Dry Coulomb friction model for contactforces is used μ N 0 x, y k t, k n friction coefficient normal preloading force of the contact relative displacement of nodes of the nonlinear contact element in the tangential and the normal directions tečné a normálové kontaktní tuhosti Calculation of harmonic coefficients for nonlinear forces U nln nln F k [Petrov E.P. and Ewins D: Analytical formulation of friction interface elements for analysis of nonlinear multiharmonic vibrations of bladed disks. ASME Journal of Turbomachinery 125: , 2003]
11 Methodology mathematical model of contacts Concept of contact stiffnesses Finite number m of mode shapes A k m r= iη k,r Ω 2 k,r kω 2 φ H k,r φ k,r Notion of contact stiffness is misleading, because it does not label only physical properties of contact. Contact stiffnesses compensate higher mode shapes that are not included in the approximation of A k. Calculation of contact stiffnesses: Linearized contact stick or μ=0 Model of nonlinear systém resonant frequency Measurement resonant frequencies FEM calculations natural frequencies
12 Methodology Computational diagram Modal anallysis of the sector without binding ANSYS Calculation of contacts localization and preload ANSYS Operating FEM mesh Quiescent FEM mesh NPP Temelín in souh Bohe Modal analysis of the system with stuck contacts ANSYS NONVIBCS In-house software Input file with description of analysis Results of modal analysis Input file specification of excitation Input file specification of binding Analysis of nonlinear vibration for cyclically symmetric system with contacts NONVIBTW_V4 In-house software Input files NONVIB_VIEW In-house software Pictures Graphs Output files Stress field ANSYS Numbers
13 Calculation of nonlinear vibration LSB mm, steel Low x z φ High y Low LSB mm, titanium alloy Each blade has two integral coupling: Tie-boss middle part Shroud (bandage) top Shr oud TieB oss High Blade geometries of LSB48 and LSB54 are moderately different. High High Contact surfaces are plane.
14 Calculation of nonlinear vibration Normalizovaná výchylka kmitání špičky lopatky Normalized max vibration amplitude, shroud contact LSB 48, excitation by traveling waves with 2 ND k T = 0, N/mm = 0,35 = 0,2 k T = N/mm s1 = 0,35 = 0,2 St-St systém Normalizovaná budící frekvence Limited number (10) of mode shapes for approximation of blade dynamic behavior necessity to fit contact stiffnesses (influenceing resonant frequencies of computational model) s2 s3 Normalized excitation frequency
15 Normalized max vibration amplitude, shroud contact Normalized tangential force, shroud Calculation of nonlinear vibration Normalizovaná výchylka kmitání špičky lopatky k T = 0, N/mm k T = N/mm s1 St-St systém = 0,35 = 0,35 s2 = 0,2 = 0,2 s Normalizovaná budící frekvence Normalized excitation frequency Normalizovaná smyková síla f T, shroud = 0,2 = 0, Normalizovaný relativní prokluz, shroud Normalized relative displacement, shroud - Higher friction coeficient, µ more friction energy dissipated in contact. - Higher energy dissipated in contacts does not lead to drop of displacement aplitudes. friction damper??
16 Normalized contact force, shroud Normalized contact force, shroud Calculation of nonlinear vibration Normalizované kontatní síly, shroud f N f T - f N Fáze kmitu [rad] Phase of vibration [rad] Normalizované kontaktní síly, shroud f T f N - f N Fáze kmitu [rad] Phase of vibration [rad] Normalizovaná výchylka kmitání špičky lopatky k T = 0, N/mm k T = N/mm s1 St-St systém = 0,35 = 0,35 s2 = 0,2 = 0,2 s Frictional sliding occurs in contact. - Excitation by travelling wave of 2ND two cycles within the period (0,2π).
17 Normalized max vibration amplitude, shroud contact Calculation of nonlinear vibration LSB 48, excitation by harmonic variation of rotor torque moment Normalizovaná výchylka kmitání špičky lopatky Sl-Sl system systém Sl-St system systém St-St system systém = 0.2 0, Normalizovaná budící frekvence Normalized excitation frequency - Linearized problems: Contacts in durable ideal sliding ( Slide ) or sticking ( Stick ). - Sl-Sl system = sliding without friction for Shroud and Tie-Boss contact. - Dangerous situation: the excitation frequency of variation of torque moment is close to the natural frequency of Sl-Sl system. - Contact couplings could activate a sleeping resonance regime.
18 Normalized max vibration amplitude, shroud contact Calculation of nonlinear vibration LSB 54, excitation by traveling waves with 8 ND Normalized excitation frequency - Analogous character as in the case of LSB 48 excited with 2ND: higher values of µ higher amplitudes of displacements of forced vibrations - loss of numerical konvergency for µ > cca 0.6.
19 Tangential force ft, shroud [kn] Dissipated power, shroud [W] Calculation of nonlinear vibration µ Relative displacement of coupled nodes, shroud [mm] Normalized excitation frequency Analysis of nonlinear vibration results: - Dissipated power in level tens W for each blade, if slipping. - Higher displacement amplitude rise for higher friction coefficient.
20 Normalized contact forces, shroud Calculation of nonlinear vibration LSB 54, excitation by traveling waves with 8 ND Phase of vibration [rad] Phase of vibration [rad] Phase of vibration [rad] - Excitation by traveling wave with 8 ND 8 cycles within the period (0,2π). - Higher friction coefficient higher amplitude of tangential and normal contact forces
21 Calculation of nonlinear vibration 0,988 ω 8,1,St 0,994 ω 8,1,St Normalizované kontaktní síly, shroud 1 f N f 0.2 T f -1 N Fáze kmitu [rad] Normalizované kontaktní síly, shroud f T f N -1 - f N Fáze kmitu [rad] µ = 0.6 : big amplitude of normal forces for excitat. frequencies close to resonance intersection of curves for µf N and -µf N We can interpreted the intersection as contact separation.
22 Contact stiffnesses The compliance of interface contact elements NPP Temelín insouth Bohemia Related to the deformations of the asperities of the contacting surfaces. May be omitted (an order of magnitude higher). 1 = = k t k x k t,comp k n k y k n,comp Related to the compensation of omitted higher modes. k t k t,comp k n k n,comp turbineroom To our knowledge, up to now, no general method for finding the values of contact stiffnesses has been introduced. We developed a (computational) method that fits the contact stiffnesses effectively, at least in our case of bladed disks (mentioned also in this lecture).
23 Conclusions Harmonic Balance Method (HBM) - It is possible to use to calculations of steady state of nonlinear vibration for bladed - It is possible to perform the calculations on PC Contact stiffnesses - They compensate higher mode shapes omitted in the approximation of dynamic compliance of a calculated system - It is necessary to fitted these contact stiffnesses Ne vždy lze třecí vazby považovat pouze za třecí tlumiče: - Větší disipovaný výkon nevede pokaždé k většímu poklesu amplitud výchylek. - Prokluz ve třecí vazbě může být příčinou nárůstu amplitud výchylek. - Separation of contact surfaces can occur Notion of sleeping resonant regime
24 Thank You very much
Static and Dynamic Analysis of mm Steel Last Stage Blade for Steam Turbine
Applied and Computational Mechanics 3 (2009) 133 140 Static and Dynamic Analysis of 1 220 mm Steel Last Stage Blade for Steam Turbine T. Míšek a,,z.kubín a aškoda POWER a. s., Tylova 57, 316 00 Plzeň,
More informationEffects of Mistuning on the Forced Response of Bladed Discs with Friction Dampers
Response of Bladed Discs with Friction Dampers E.P. Petrov and D.J. Ewins Mechanical Engineering Department Imperial College London, South Kensington Campus London, SW7 2AZ, United Kingdom y.petrov@imperial.ac.uk,
More informationEffects of Damping and Varying Contact Area at Blade-Disk Joints in Forced Response Analysis of Bladed Disk Assemblies
E. P. Petrov D. J. Ewins Centre of Vibration Engineering, Mechanical Engineering Department, Imperial College London, South Kensington Campus, London SW7 2AZ, UK Effects of Damping and Varying Contact
More informationContribution to the dynamic behaviour of bladed disks
Applied and Computational Mechanics 1 (2007) Contribution to the dynamic behaviour of bladed disks P. Lošák a, E. Malenovský a, a Institute of SolidMechanics,Mechatronics andbiomechanics, VUTBrno, Technická
More informationExplicit Finite Element Models of Friction Dampers in Forced Response Analysis of Bladed Disks
E. P. Petrov Centre of Vibration Engineering, Mechanical Engineering Department, Imperial College London, South Kensington Campus, London SW7 2AZ, UK e-mail: y.petrov@imperial.ac.uk Explicit Finite Element
More informationBlade Group Fatigue Life Calculation under Resonant Stresses
TEM Journal. Volume 6, Issue, Pages 73-80, ISSN 227-8309, DOI: 0.842/TEM6-25, February 207. Blade Group Fatigue Life Calculation under Resonant Stresses Zlatko Petreski, Goce Tasevski Ss. Cyril and Methodius
More informationCalculation of the Forced Response of a Turbine Bladed. Disk with Underplatform Dampers
Calculation of the Forced Response of a Turbine Bladed Disk with Underplatform Dampers BY EMANUELE GROSSI B.S., Politecnico di Torino, Turin, Italy, 214 THESIS Submitted as partial fulfillment of the requirements
More informationDEVELOPMENT OF MICROSLIP FRICTION MODELS AND FORCED RESPONSE PREDICTION METHODS FOR FRICTIONALLY CONSTRAINED TURBINE BLADES
DEVELOPMENT OF MICROSLIP FRICTION MODELS AND FORCED RESPONSE PREDICTION METHODS FOR FRICTIONALLY CONSTRAINED TURBINE BLADES DISSERTATION Presented in Partial Fulfillment of the Requirements for the Degree
More informationAEROELASTICITY IN AXIAL FLOW TURBOMACHINES
von Karman Institute for Fluid Dynamics Lecture Series Programme 1998-99 AEROELASTICITY IN AXIAL FLOW TURBOMACHINES May 3-7, 1999 Rhode-Saint- Genèse Belgium STRUCTURAL DYNAMICS: BASICS OF DISK AND BLADE
More informationModal and Harmonic analysis of L.P. Turbine of a small Turbo- Fan engine using Finite Element Method
Failure of Engineering Materials & Structures Code 04 UET TAXILA MECHNICAL ENGINEERING DEPARTMENT Modal and Harmonic analysis of L.P. Turbine of a small Turbo- Fan engine using Finite Element Method H.
More informationIntroduction to structural dynamics
Introduction to structural dynamics p n m n u n p n-1 p 3... m n-1 m 3... u n-1 u 3 k 1 c 1 u 1 u 2 k 2 m p 1 1 c 2 m2 p 2 k n c n m n u n p n m 2 p 2 u 2 m 1 p 1 u 1 Static vs dynamic analysis Static
More informationFinite Element Analysis Lecture 1. Dr./ Ahmed Nagib
Finite Element Analysis Lecture 1 Dr./ Ahmed Nagib April 30, 2016 Research and Development Mathematical Model Mathematical Model Mathematical Model Finite Element Analysis The linear equation of motion
More informationME 563 HOMEWORK # 7 SOLUTIONS Fall 2010
ME 563 HOMEWORK # 7 SOLUTIONS Fall 2010 PROBLEM 1: Given the mass matrix and two undamped natural frequencies for a general two degree-of-freedom system with a symmetric stiffness matrix, find the stiffness
More informationVibration of imperfect rotating disk
Applied and Computational Mechanics 5 (2011) 205 216 Vibration of imperfect rotating disk L. Půst a,,l.pešek a a Institute of Thermomechanics AS CR, v. v. i., Dolejškova 5, 182 00 Praha 8, Czech Republic
More information3D 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 informationNonlinear dynamics of mechanical systems with friction contacts: coupled static and dynamic Multi-Harmonic Balance Method and multiple solutions.
Nonlinear dynamics of mechanical systems with friction contacts: coupled static and dynamic Multi-Harmonic Balance Method and multiple solutions. Stefano Zucca a a Politecnico di orino, Department of Mechanical
More informationPenn State Center for Acoustics and Vibration (CAV)
Penn State Center for Acoustics and Vibration (CAV) Structural Vibration and Acoustics Group Presented as part of the 2015 CAV Spring workshop Stephen Hambric, Group Leader May 2015 Robert Campbell James
More informationLinear and Nonlinear Dynamics of a Turbine Blade in Presence of an. Underplatform Damper with Friction
Linear and Nonlinear Dynamics of a Turbine Blade in Presence of an Underplatform Damper with Friction BY STEFANO MICHELIS Laurea, Politenico di Torino, Torino, Italy, 2012 THESIS Submitted as partial fulfillments
More informationPropagation of Uncertainty in Stress Estimation in Turbine Engine Blades
Propagation of Uncertainty in Stress Estimation in Turbine Engine Blades Giorgio Calanni, Vitali Volovoi, and Massimo Ruzzene Georgia Institute of Technology Atlanta, Georgia and Charles Vining Naval Air
More informationA Guide to linear dynamic analysis with Damping
A Guide to linear dynamic analysis with Damping This guide starts from the applications of linear dynamic response and its role in FEA simulation. Fundamental concepts and principles will be introduced
More informationSimulation of the Stick-Slip Friction between Steering Shafts Using ADAMS/PRE
Simulation of the Stick-Slip Friction between Steering Shafts Using ADAMS/PRE Dexin Wang and Yuting Rui Research & Vehicle Technology Ford Motor Company ABSTRACT Cyclic stick-slip friction is a well-known
More information1663. Dynamic mechanism and parametric analysis of shrouded blades in aircraft engines
1663. Dynamic mechanism and parametric analysis of shrouded blades in aircraft engines Guofang Nan 1, Yuanlu Zhang 2 School of Energy and Power Engineering, University of Shanghai for Science and Technology,
More informationDynamics of assembled structures of rotor systems of aviation gas turbine engines of type two-rotor
Dynamics of assembled structures of rotor systems of aviation gas turbine engines of type two-rotor Anatoly А. Pykhalov 1, Mikhail А. Dudaev 2, Mikhail Ye. Kolotnikov 3, Paul V. Makarov 4 1 Irkutsk State
More informationANALYSIS AND EXPERIMENT OF DYNAMIC CHARACTERISTICS OF ELECTRONIC DEVICE CHASSIS
ANALYSIS AND EXPERIMENT OF DYNAMIC CHARACTERISTICS OF ELECTRONIC DEVICE CHASSIS HE QING, DU DONGMEI, JIANG XUCHAO Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, Ministry
More informationIntegration simulation method concerning speed control of ultrasonic motor
Integration simulation method concerning speed control of ultrasonic motor R Miyauchi 1, B Yue 2, N Matsunaga 1 and S Ishizuka 1 1 Cybernet Systems Co., Ltd. 3 Kanda-neribeicho,Chiyoda-ku, Tokyo,101-0022,Japan
More informationProgram 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 informationA NEW DYNAMIC SUBSTRUCTURING METHOD FOR NONLINEAR AND DISSIPATIVE SYSTEMS
ECCOMAS Congress 2016 VII European Congress on Computational Methods in Applied Sciences and Engineering M. Papadrakakis, V. Papadopoulos, G. Stefanou, V. Plevris (eds.) Crete Island, Greece, 5 10 June
More informationEFFECT OF TAPER AND TWISTED BLADE IN STEAM TURBINES
EFFECT OF TAPER AND TWISTED BLADE IN STEAM TURBINES Tulsidas.D 1, M.Shantharaja 2 1 Department of Mechanical Engineering, Acharya Institute of Technology, Bangalore-560107, (India) 2 Department of Mechanical
More informationThe application of Eulerian laser Doppler vibrometry to the on-line condition monitoring of axial-flow turbomachinery blades
UNIVERSITY OF PRETORIA The application of Eulerian laser Doppler vibrometry to the on-line condition monitoring of axial-flow turbomachinery blades by Abrie Oberholster Supervisor: Professor Stephan Heyns
More informationa) Find the equation of motion of the system and write it in matrix form.
.003 Engineering Dynamics Problem Set Problem : Torsional Oscillator Two disks of radius r and r and mass m and m are mounted in series with steel shafts. The shaft between the base and m has length L
More informationSHAKING TABLE DEMONSTRATION OF DYNAMIC RESPONSE OF BASE-ISOLATED BUILDINGS ***** Instructor Manual *****
SHAKING TABLE DEMONSTRATION OF DYNAMIC RESPONSE OF BASE-ISOLATED BUILDINGS ***** Instructor Manual ***** A PROJECT DEVELOPED FOR THE UNIVERSITY CONSORTIUM ON INSTRUCTIONAL SHAKE TABLES http://wusceel.cive.wustl.edu/ucist/
More informationD && 9.0 DYNAMIC ANALYSIS
9.0 DYNAMIC ANALYSIS Introduction When a structure has a loading which varies with time, it is reasonable to assume its response will also vary with time. In such cases, a dynamic analysis may have to
More information19 th Blade Mechanics Seminar: Abstracts
19 th Blade Mechanics Seminar: Abstracts ZHAW Zurich University of Applied Sciences IMES Institute of Mechanical Systems in Winterthur, Switzerland Thursday, September 11 th, 2014 Eulachpassage, TN E0.58,
More informationDynamic Analysis on Vibration Isolation of Hypersonic Vehicle Internal Systems
International Journal of Engineering Research and Technology. ISSN 0974-3154 Volume 6, Number 1 (2013), pp. 55-60 International Research Publication House http://www.irphouse.com Dynamic Analysis on Vibration
More informationActive Integral Vibration Control of Elastic Bodies
Applied and Computational Mechanics 2 (2008) 379 388 Active Integral Vibration Control of Elastic Bodies M. Smrž a,m.valášek a, a Faculty of Mechanical Engineering, CTU in Prague, Karlovo nam. 13, 121
More informationLecture 9: Harmonic Loads (Con t)
Lecture 9: Harmonic Loads (Con t) Reading materials: Sections 3.4, 3.5, 3.6 and 3.7 1. Resonance The dynamic load magnification factor (DLF) The peak dynamic magnification occurs near r=1 for small damping
More informationFinite 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 informationA NEW ANALYSIS APPROACH FOR MOTORCYCLE BRAKE SQUEAL NOISE AND ITS ADAPTATION
SETC001 01 1850 A NEW ANALYSIS APPROACH FOR MOTORCYCLE BRAKE SQUEAL NOISE AND ITS ADAPTATION Hiroyuki Nakata, Kiyoshi Kobayashi, Masashi Kajita - Honda R&D Co., Ltd. - JAPAN C.H.Jerry CHUNG - MTS Systems
More informationOn 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 informationResponse Spectrum Analysis Shock and Seismic. FEMAP & NX Nastran
Response Spectrum Analysis Shock and Seismic FEMAP & NX Nastran Table of Contents 1. INTRODUCTION... 3 2. THE ACCELEROGRAM... 4 3. CREATING A RESPONSE SPECTRUM... 5 4. NX NASTRAN METHOD... 8 5. RESPONSE
More informationVibration characteristics analysis of a centrifugal impeller
Vibration characteristics analysis of a centrifugal impeller Di Wang 1, Guihuo Luo 2, Fei Wang 3 Nanjing University of Aeronautics and Astronautics, College of Energy and Power Engineering, Nanjing 210016,
More informationNONLINEAR REDUCED ORDER MODELS AND DAMAGE DETECTION IN SYSTEMS WITH COMPLEX GEOMETRY
NONLINEAR REDUCED ORDER MODELS AND DAMAGE DETECTION IN SYSTEMS WITH COMPLEX GEOMETRY by Chulwoo Jung A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy
More informationParameter Design of High Speed Coupling for 6 MW Wind Turbine Considering Torsional Vibration
Parameter Design of High Speed Coupling for 6 MW Wind Turbine Considering Torsional Vibration JongHun Kang 1, Junwoo Bae 2, Seungkeun Jeong 3, SooKeun Park 4 and Hyoung Woo Lee 1 # 1 Department of Mechatronics
More informationTheoretical Basis of Modal Analysis
American Journal of Mechanical Engineering, 03, Vol., No. 7, 73-79 Available online at http://pubs.sciepub.com/ajme//7/4 Science and Education Publishing DOI:0.69/ajme--7-4 heoretical Basis of Modal Analysis
More informationCh. 10: Fundamental of contact between solids
Ch. 10: Fundamental of contact between solids Actual surface is not smooth. At atomic scale, there are always defects at surface, such as vacancies, ledges, kinks, terraces. In micro or macro scale, roughness
More informationStructural System, Machines and Load Cases
Machine-Induced Vibrations Machine-Induced Vibrations In the following example the dynamic excitation of two rotating machines is analyzed. A time history analysis in the add-on module RF-DYNAM Pro - Forced
More informationEN40: Dynamics and Vibrations. Final Examination Wed May : 2pm-5pm
EN40: Dynamics and Vibrations Final Examination Wed May 10 017: pm-5pm School of Engineering Brown University NAME: General Instructions No collaboration of any kind is permitted on this examination. You
More informationDYNAMIC STRESS MEASUREMENT OF CENTRIFUGAL COMPRESSOR IMPELLER AND STUDY FOR STRENGTH CRITERIA BASED ON CORRELATION BY UNSTEADY CFD
DYNAMIC STRESS MEASUREMENT OF CENTRIFUGAL COMPRESSOR IMPELLER AND STUDY FOR STRENGTH CRITERIA BASED ON CORRELATION BY UNSTEADY CFD by Atsushi Higashio Senior Engineer Hiroyuki Yamashita Research Engineer
More informationTemperature analysis of a pin-on-disc tribology test using experimental and numerical approaches
Friction 4(2): 135 143 (2016) ISSN 2223-7690 DOI 10.1007/s40544-016-0110-1 CN 10-1237/TH RESEARCH ARTICLE Temperature analysis of a pin-on-disc tribology test using experimental and numerical approaches
More informationAdvantages, Limitations and Error Estimation of Mixed Solid Axisymmetric Modeling
Advantages, Limitations and Error Estimation of Mixed Solid Axisymmetric Modeling Sudeep Bosu TATA Consultancy Services Baskaran Sundaram TATA Consultancy Services, 185 Lloyds Road,Chennai-600086,INDIA
More informationTowards 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 informationMode family identification of a blisk by tip timing measurements
Abstract : Mode family identification of a blisk by tip timing measurements Vsevolod Kharyton a, Claude Gibert a, Laurent Blanc a, Fabrice Thouverez a a. Laboratory of Tribology and System Dynamics UMR5513,
More informationNONLINEAR VIBRATION ANALYSIS OF CRACKED STRUCTURES APPLICATION TO TURBOMACHINERY ROTORS WITH CRACKED BLADES
NONLINEAR VIBRATION ANALYSIS OF CRACKED STRUCTURES APPLICATION TO TURBOMACHINERY ROTORS WITH CRACKED BLADES by Akira Saito A dissertation submitted in partial fulfillment of the requirements for the degree
More informationInfluence of friction coefficient on rubbing behavior of oil bearing rotor system
Influence of friction coefficient on rubbing behavior of oil bearing rotor system Changliang Tang 1, Jinfu ang 2, Dongjiang Han 3, Huan Lei 4, Long Hao 5, Tianyu Zhang 6 1, 2, 3, 4, 5 Institute of Engineering
More informationVIBRATION 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 informationStructural Dynamics. Spring mass system. The spring force is given by and F(t) is the driving force. Start by applying Newton s second law (F=ma).
Structural Dynamics Spring mass system. The spring force is given by and F(t) is the driving force. Start by applying Newton s second law (F=ma). We will now look at free vibrations. Considering the free
More informationIdentification of damage location using Operational Deflection Shape (ODS)
Identification of damage location using Operational Deflection Shape (ODS) D. Di Maio, C. Zang, D. J. Ewins Mr. Dario Di Maio, Mechanical Engineering Bldg. Imperial College London, South Kensington Campus.
More informationPLEASURE VESSEL VIBRATION AND NOISE FINITE ELEMENT ANALYSIS
PLEASURE VESSEL VIBRATION AND NOISE FINITE ELEMENT ANALYSIS 1 Macchiavello, Sergio *, 2 Tonelli, Angelo 1 D Appolonia S.p.A., Italy, 2 Rina Services S.p.A., Italy KEYWORDS pleasure vessel, vibration analysis,
More informationSimulating Two-Dimensional Stick-Slip Motion of a Rigid Body using a New Friction Model
Proceedings of the 2 nd World Congress on Mechanical, Chemical, and Material Engineering (MCM'16) Budapest, Hungary August 22 23, 2016 Paper No. ICMIE 116 DOI: 10.11159/icmie16.116 Simulating Two-Dimensional
More informationDamping of materials and members in structures
Journal of Physics: Conference Series Damping of materials and members in structures To cite this article: F Orban 0 J. Phys.: Conf. Ser. 68 00 View the article online for updates and enhancements. Related
More informationSAMCEF 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 informationIntroduction 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 informationDynamic 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 informationDr.Vinod Hosur, Professor, Civil Engg.Dept., Gogte Institute of Technology, Belgaum
STRUCTURAL DYNAMICS Dr.Vinod Hosur, Professor, Civil Engg.Dept., Gogte Institute of Technology, Belgaum Overview of Structural Dynamics Structure Members, joints, strength, stiffness, ductility Structure
More informationNonlinear system identification with the use of describing functions a case study
Nonlinear system identification with the use of describing functions a case study Zhongge Zhao 1, Chuanri Li 2, Kjell Ahlin 3, Huan Du 4 1, 2, 4 School of Reliability and System Engineering, Beihang University,
More informationRESONANCE IDENTIFICATION FOR IMPELLERS
RESONANCE IDENTIFICATION FOR IMPELLERS by Murari P. Singh Chief Engineer and Manager of Engineering Technology Bhabesh K. Thakur Senior Structural Analyst William E. Sullivan Senior Structural Analyst
More informationMechatronics, 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 informationNUMERICAL MODELLING OF RUBBER VIBRATION ISOLATORS
NUMERICAL MODELLING OF RUBBER VIBRATION ISOLATORS Clemens A.J. Beijers and André de Boer University of Twente P.O. Box 7, 75 AE Enschede, The Netherlands email: c.a.j.beijers@utwente.nl Abstract An important
More informationResearch Program Vibrations ENERGIFORSK Vibration Group
Vorlesungen Mechatronik im Wintersemester Research Program Vibrations ENERGIFORSK Vibration Group DIAM A Matrix Tool for Turbine and Generator Vibrations Detection, Investigation, Analysis, Mitigation
More informationTransient Analysis of Disk Brake By using Ansys Software
Transient Analysis of Disk Brake By using Ansys Software G. Babukanth & M. Vimal Teja Department of Mechanical Engineering, Nimra College of Engineering & Technology, Ibrahimpatnam, Vijayawada E-mail :
More informationTheory 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 informationDynamic Modelling of Mechanical Systems
Dynamic Modelling of Mechanical Systems Dr. Bishakh Bhattacharya Professor, Department of Mechanical Engineering g IIT Kanpur Joint Initiative of IITs and IISc - Funded by MHRD Hints of the Last Assignment
More informationGraphical 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 informationLinearization of friction effects in vibration of two rotating blades
Applied and Computational Mechanics 7 (2013) 5 22 Linearization of friction effects in vibration of two rotating blades M. Byrtus a,,m.hajžman a,v.zeman a a Faculty of Applied Sciences, University of West
More information18 th Blade Mechanics Seminar: Abstracts
18 th Blade Mechanics Seminar: Abstracts ZHAW Zurich University of Applied Sciences IMES Institute of Mechanical Systems in Winterthur, Switzerland Wednesday, September 11 th, 2013 Eulachpassage, TN E0.58,
More informationSTEEL PIPE CLAMPS - STRESS AND FRICTION CAPACITY ANALYSIS
Transactions, SMiRT-23 STEEL PIPE CLAMPS - STRESS AND FRICTION CAPACITY ANALYSIS Alexander Shchukin 1, Petr Zabirokhin 2, Frank Barutzki 3 1 Principal, CKTI-Vibroseism, Saint-Petersburg, Russia 2 Leading
More informationEVALUATING DYNAMIC STRESSES OF A PIPELINE
EVALUATING DYNAMIC STRESSES OF A PIPELINE by K.T. TRUONG Member ASME Mechanical & Piping Division THE ULTRAGEN GROUP LTD 2255 Rue De La Province Longueuil (Quebec) J4G 1G3 This document is provided to
More informationCOUPLED USE OF FEA AND EMA FOR THE INVESTIGATION OF DYNAMIC BEHAVIOUR OF AN INJECTION PUMP
COUPLED USE OF FEA AND EMA FOR THE INVESTIGATION OF DYNAMIC BEHAVIOUR OF AN INJECTION PUMP Yasar Deger Wolfram Lienau Peter Sandford Sulzer Markets & Sulzer Pumps Ltd Sulzer Pumps (UK) Ltd Technology Ltd
More informationT1 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 informationANALYSIS OF NATURAL FREQUENCIES OF DISC-LIKE STRUCTURES IN WATER ENVIRONMENT BY COUPLED FLUID-STRUCTURE-INTERACTION SIMULATION
6 th IAHR International Meeting of the Workgroup on Cavitation and Dynamic Problems in Hydraulic Machinery and Systems, September 9-11, 15, Ljubljana, Slovenia ANALYSIS O NATURAL REQUENCIES O DISC-LIKE
More informationFrequency Failure Investigation on Shrouded Steam Turbine Blade through Dynamic Analysis
Frequency Failure Investigation on Shrouded Steam Turbine Blade through Dynamic Analysis P. Nagababu 1, TSSR Krishna 2, M. Venkata naveen 3 M.Tech Student, Department of Mechanical Engineering, SVEC, Andhra
More informationSPECIAL DYNAMIC SOIL- STRUCTURE ANALYSIS PROCEDURES DEMONSTATED FOR TWO TOWER-LIKE STRUCTURES
2010/2 PAGES 1 8 RECEIVED 21. 9. 2009 ACCEPTED 20. 1. 2010 Y. KOLEKOVÁ, M. PETRONIJEVIĆ, G. SCHMID SPECIAL DYNAMIC SOIL- STRUCTURE ANALYSIS PROCEDURES DEMONSTATED FOR TWO TOWER-LIKE STRUCTURES ABSTRACT
More informationVibration and Modal Analysis of Small Induction Motor Yan LI 1, a, Jianmin DU 1, b, Jiakuan XIA 1
International Conference on Advances in Mechanical Engineering and Industrial Informatics (AMEII 215) Vibration and Modal Analysis of Small Induction Motor Yan LI 1, a, Jianmin DU 1, b, Jiakuan XIA 1 1
More informationDYNAMICS OF MACHINERY 41514
DYNAMICS OF MACHINERY 454 PROJECT : Theoretical and Experimental Modal Analysis and Validation of Mathematical Models in Multibody Dynamics Holistic Overview of the Project Steps & Their Conceptual Links
More informationFORCED RESPONSE COMPUTATION FOR BLADED DISKS INDUSTRIAL PRACTICES AND ADVANCED METHODS
FORCED RESPONSE COMPUTATION FOR BLADED DISKS INDUSTRIAL PRACTICES AND ADVANCED METHODS E. Seinturier * Turbomeca (SAFRAN) Bordes, France Abstract The aero-mechanical optimisation of turbomachinery bladed
More informationDESIGN AND VIBRATION ANALYSIS OF SCREW COMPRESSOR
DESIGN AND VIBRATION ANALYSIS OF SCREW COMPRESSOR Ankita Mozar *1,Komal Mahanavar *2,Snehal Kedar *3 Aboli Barge *4,Asst. Prof. R. S.Lahane *5 1 Dept. Of Mechanical Engineering, D.Y.Patil College Of Engineering,Akurdi,
More informationAnalysis of Tensioner Induced Coupling in Serpentine Belt Drive Systems
2008-01-1371 of Tensioner Induced Coupling in Serpentine Belt Drive Systems Copyright 2007 SAE International R. P. Neward and S. Boedo Department of Mechanical Engineering, Rochester Institute of Technology
More informationModeling of Contact Interfaces in Built-up Structures by Zero-thickness Elements
Modeling of Contact Interfaces in Built-up Structures by Zero-thickness Elements Professor Lothar Gaul 1, Dr. Michael Mayer 2 1 University of Stuttgart, Institute of Applied and Experimental Mechanics,
More informationVTU-NPTEL-NMEICT Project
VTU-NPTEL-NMEICT Project Progress Report The Project on Development of Remaining Three Quadrants to NPTEL Phase-I under grant in aid NMEICT, MHRD, New Delhi SME Name : Course Name: Type of the Course Module
More informationNon-Linearities in an Aero-Engine Structure: From Test to Design
Non-Linearities in an Aero-Engine Structure: From Test to Design S. Perinpanayagam, D. Robb, D. J. Ewins Centre for Vibration Engineering Mechanical Engineering Department Imperial College London Exhibition
More informationPreliminary Examination - Dynamics
Name: University of California, Berkeley Fall Semester, 2018 Problem 1 (30% weight) Preliminary Examination - Dynamics An undamped SDOF system with mass m and stiffness k is initially at rest and is then
More informationAn advanced underplatform damper modelling approach based on a microslip contact model
An advanced underplatform damper modelling approach based on a microslip contact model L.Pesaresi 1 *, J.Armand 1,C.W.Schwingshackl 1, L.Salles 1, C.Wong 2 SYMPOSIA ON ROTATING MACHINERY ISROMAC 217 International
More informationInstabilities and Dynamic Rupture in a Frictional Interface
Instabilities and Dynamic Rupture in a Frictional Interface Laurent BAILLET LGIT (Laboratoire de Géophysique Interne et Tectonophysique) Grenoble France laurent.baillet@ujf-grenoble.fr http://www-lgit.obs.ujf-grenoble.fr/users/lbaillet/
More informationDetermination of Natural Frequency of Transportation Container by Experimental Modal Analysis
Determination of Natural Frequency of Transportation Container by Experimental Modal Analysis S.S.Pachpore1, S.N.Khan 2, Dr. S.S. Salunkhe 3,V.J.Jagtap 4 1( Student, RSSOER, JSPM NarheTecnicalCampus, Pune,
More informationCritical 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 informationRotation. Rotational Variables
Rotation Rigid Bodies Rotation variables Constant angular acceleration Rotational KE Rotational Inertia Rotational Variables Rotation of a rigid body About a fixed rotation axis. Rigid Body an object that
More informationInstitute of Structural Engineering Page 1. Method of Finite Elements I. Chapter 2. The Direct Stiffness Method. Method of Finite Elements I
Institute of Structural Engineering Page 1 Chapter 2 The Direct Stiffness Method Institute of Structural Engineering Page 2 Direct Stiffness Method (DSM) Computational method for structural analysis Matrix
More informationPROJECT 1 DYNAMICS OF MACHINES 41514
PROJECT DYNAMICS OF MACHINES 454 Theoretical and Experimental Modal Analysis and Validation of Mathematical Models in Multibody Dynamics Ilmar Ferreira Santos, Professor Dr.-Ing., Dr.Techn., Livre-Docente
More informationRecent developments for frequency domain analysis in LS-DYNA
Recent developments for frequency domain analysis in LS-DYNA Yun Huang, Zhe Cui Livermore Software Technology Corporation 1 Introduction Since ls971 R6 version, a series of frequency domain features have
More information1615. Nonlinear dynamic response analysis of a cantilever beam with a breathing crack
65. Nonlinear dynamic response analysis of a cantilever beam with a breathing crack ShaoLin Qiu, LaiBin Zhang 2, JiaShun Hu 3, Yu Jiang 4, 2 College of Mechanical, Storage and Transportation Engineering,
More information