Design/Analysis of Isolation System for the Oceaneering Space Systems Cargo Transport Container
|
|
- Lenard West
- 5 years ago
- Views:
Transcription
1 Design/Analysis of Isolation System for the Oceaneering Space Systems Cargo Transport Container Arya Majed, Ph.D. Applied Structural Dynamics, Inc. ASD-TB-2-27 Updated:1/1/22
2 CTC System Architecture Cargo Transport Container (CTC) An isolated cargo box manifested on Space Shuttle cross-bay carriers intended to carry a wide range of cargo mass while mitigating the Shuttle dynamic environment 2
3 Task ASD tasked with the design, analysis, and test support of an isolation system for the OSS Cargo Transport Container (CTC) that will mitigate the Space Shuttle transient and random environments 3
4 Tasks Performed Design/specification/optimization of isolation system Isolation system modeling CTC finite element model (FEM) dynamic math model reduction Variational Coupled loads analyses Evaluated CTC capability to be launched at the specified locations on cross-bay carriers Evaluated with varying CTC cargo weight on the cross-bay carriers From 85 to 535 lbs Optimized isolation system parameters Developed predicted load environments for the CTC mounted at each carrier location Test Support 4
5 Definitions Cargo Element (CE) across-the-bay cargo carrier structure attached to shuttle via primary and stabilizer trunnions Cargo Item (CI) substructures manifested on a CE Cargo Transport Container (CTC) An isolated CI intended to carry a wide range of cargo mass while mitigating the CE dynamic environment Coupled Loads Analysis (CLA) Transient analysis of the coupled Shuttle / CE system for the events of liftoff and landing Variational Coupled Loads Analysis (VCLA) CLAs with parameter variation yielding the entire spectrum of response relative to that parameter Base-Shake Analysis An approximate analysis method where the coupling of the CE to CI is ignored 5
6 Background CI from dynamic environment involves: Tuning Suspension soft enough to mitigate significant dynamic amplification Low frequency transients (< 35 Hz) Structural-borne random vibrations Suspension stiff enough to contain excessive relative motion for both transient and quasi-static flight events Damping Mitigate any amplifications due to coupling of the isolated CI frequencies with integrated CE frequencies CI tuning easily accomplished for CI integrated on stiff carrier structure, i.e., insignificant isolated CI/integrated CE coupling 6
7 Background - continued With integrated CE frequencies a function of the manifested cargo weight and the isolated CI frequencies a function of CI weight, adverse coupling with CI amplified response is possible Isolator damping becomes critically important Proof of concept best demonstrated with multiple Coupled Loads Analyses, showing the entire spectrum of the isolated CTC response as a function of overall manifested CE weight and CI weight Coupled Loads Analyses varying a parameter in each analysis are referred to as a Variational Coupled Loads Analyses Beware - base-shake analyses cannot account for isolated CI/integrated CE coupling! 7
8 Aeroflex Wire rope Isolators Totally passive, robust design Weakly nonlinear stiffness characteristics Nonlinear Coulomb friction energy dissipation Significant energy dissipation through internal friction, equivalent ζ ~ 15% of critical damping Certified for flight aboard Orbiter, utilized in aft fuselage Aeroflex springs in the Main Propulsion System (MPS) Orbiter aft fuselage Attenuation and shock protection for MPS components 8
9 Aeroflex Wire-rope Isolators - continued Off the shelf hardware Wide range of application in vibration and shock isolation 9
10 Aeroflex Wire-rope Isolators - Tuning Longeron Xo Liftoff Dynamic Environment Tune Isolator 1
11 Aeroflex Wire-rope Isolators - Tuning Longeron Yo Liftoff Dynamic Environment Tune Isolator 11
12 Aeroflex Wire-rope Isolators - Tuning Longeron Zo Liftoff Dynamic Environment Tune Isolator 12
13 Aeroflex Wire-rope Isolators Selection Frequency Stiffness f = 1 2π K M K = 4π 2 f 2 M = 4π 2 f 2W / 386 Gives Isolator total stiffness a function of the designated isolation frequency and weight of the isolated object Isolator stiffness = total stiffness / number of isolators Select from Aeroflex Manual Dynamic Travel - x = K 1 Ma = a 4π 2 f 13 2
14 Aeroflex Wire-rope Isolators Selection - continued 14
15 Aeroflex Wire-rope Isolators Selection - continued 15
16 Aeroflex Wire-rope Isolators Selection - continued 16
17 Aeroflex Wire-rope Isolators Stiffness Model Derive a stiffness matrix for Aeroflex helical spring Stiffness (per Aeroflex brochure) Kct is the compression/tension stiffness Ksr is the shear/roll stiffness h is the height of the spring L is the length of the spring w is the bar width 17
18 Aeroflex Wire-rope Isolators Stiffness Model Coordinate System Stiffness derived in spring coordinate system A y z A View A-A y x 18
19 Aeroflex Wire Rope Stiffness Matrix [ K sr K ct K sr 1 h K sr 2 1 h K sr L K ct 12 1 h K sr 2 K sr 1 h K sr 2 K sr K ct K sr 1 h K sr 2 1 h K sr L K ct L K sr 12 1 h K sr w K ct 2 K sr K ct K ct K sr K sr 1 h K sr 2 1 h K sr L K ct 12 1 h K sr 2 1 h K sr L K ct 12 1 h K sr 2 1 w 2 K ct 2 1 h K sr 2 1 h K sr L K sr 12 CB13-3 Aeroflex wire rope springs Ksr = 42 lbs./inch Kct = 169 lbs./inch L = 14 inches 19 1 h K sr L K sr 12 1 h K sr 2 1 w 2 K ct L K sr w K ct 2 ]
20 Analysis Plan Variational Coupled Loads Analysis Cargo bay manifest (typical Utilization Logistic Flight) ODS RMS ICC ( 4 CTC units, 2 hard-mounted / 2 isolated) MPLM LMC (2 CTC units, 1 hard-mounted / 1 isolated) Conduct Variational Coupled Loads Analysis Develop the full spectrum of response variations of the isolated and hard-mounted CTCs as the cargo weight for each box is varied from 85 to 535 lbs by 45 lbs increments 2
21 Cargo Bay Manifest for Coupled Loads Analysis 21
22 OSS CTC Finite Element Model (FEM) with Aeroflex Springs Frequencies Note: Rigidly mounted CTC with 535 Lbs of cargo frequency > 3 Hz 22
23 ICC CE FEM Integrated with 4 PFAPs CTC_5k Rigid CTC_7k Isolated CTC_9k Rigid KYA CTC_3k Isolated XICC 23
24 Integrated ICC / CTC FEM 24
25 Integrated LMC/CTC Sketch Top View LMC Model delivered as a reduced Dynamic Math Model Isolated CTC Rigidly Mounted CTC 25
26 Integrated LMC/CTC Sketch Front View 26
27 CTC Xo Cargo Acceleration Spectrum Isolated vs. Rigidly Mounted ICC Liftoff VCLA 27
28 CTC Yo Cargo Acceleration Spectrum Isolated vs. Rigidly Mounted ICC Liftoff VCLA 28
29 CTC Zo Cargo Acceleration Spectrum Isolated vs. Rigidly Mounted ICC Liftoff VCLA 29
30 CTC Xo Net-Load Factor Spectrum Isolated vs. Rigidly Mounted ICC Liftoff VCLA 3
31 CTC Yo Net-Load Factor Spectrum Isolated vs. Rigidly Mounted ICC Liftoff VCLA 31
32 CTC Zo Net-Load Factor Spectrum Isolated vs. Rigidly Mounted ICC Liftoff VCLA 32
33 CTC AFRAM/PFRAM I/F Force Spectrum Z ICC Liftoff VCLA 33
34 CTC/AFRAM I/F Rel. Displ. Spectrum -x/-y corner Xo ICC Liftoff VCLA 34
35 CTC/AFRAM I/F Rel. Displ. Spectrum -x/-y corner Yo ICC Liftoff VCLA 35
36 CTC/AFRAM I/F Rel. Displ. Spectrum -x/-y corner Zo ICC Liftoff VCLA 36
37 CTC/AFRAM I/F Force -x/+y corner Y (element coordinate system) ICC Liftoff VCLA 37
38 CTC Xo Cargo Acceleration Time-history Isolated vs. Rigidly Mounted (13 lbs of Cargo) ICC Landing CLA 38
39 CTC Yo Cargo Acceleration Time-history Isolated vs. Rigidly Mounted (13 lbs of Cargo) ICC Landing CLA 39
40 CTC Zo Cargo Acceleration Time-history Isolated vs. Rigidly Mounted (13 lbs of Cargo) ICC Landing CLA 4
41 CTC Xo Cargo Acceleration Time-history Isolated vs. Rigidly Mounted (49 lbs of Cargo) ICC Landing CLA 41
42 CTC Yo Cargo Acceleration Time-history Isolated vs. Rigidly Mounted (49 lbs of Cargo) ICC Landing CLA 42
43 CTC Zo Cargo Acceleration Time-history Isolated vs. Rigidly Mounted (49 lbs of Cargo) ICC Landing CLA 43
44 CTC Xo Cargo Acceleration Spectrum Isolated vs. Rigidly Mounted ICC Landing VCLA 44
45 CTC Yo Cargo Acceleration Spectrum Isolated vs. Rigidly Mounted ICC Landing VCLA 45
46 CTC Zo Cargo Acceleration Spectrum Isolated vs. Rigidly Mounted ICC Landing VCLA 46
47 CTC Xo Cargo Acceleration Spectrum Isolated vs. Rigidly Mounted LMC Liftoff VCLA 47
48 CTC Yo Cargo Acceleration Spectrum Isolated vs. Rigidly Mounted LMC Liftoff VCLA 48
49 CTC Zo Cargo Acceleration Spectrum Isolated vs. Rigidly Mounted LMC Liftoff VCLA 49
50 CTC Xo Cargo Acceleration Spectrum Isolated vs. Rigidly Mounted LMC Landing VCLA 5
51 CTC Yo Cargo Acceleration Spectrum Isolated vs. Rigidly Mounted LMC Landing VCLA 51
52 CTC Zo Cargo Acceleration Spectrum Isolated vs. Rigidly Mounted LMC Landing VCLA 52
53 Net-load Factor Summary Tables from Coupled Loads Analyses ICC Liftoff Flight Event Low Frequency Random Vibration 1 Combination (RSS one axis 2 at a time) 3 Landing LMC Liftoff Flight Event Low Frequency Random Vibration 1 Combination (RSS one axis 2 at a time) 3 Landing Nx Unisolated Ny Nx Unisolated Ny Nz Nz Nx 2.84 Isolated Ny 2.8 Nz Nx 2.65 Isolated Ny 1.41 Nz
54 Sidewall Mounted CTC Net-Load Factors Base-shake analysis conducted on a 31 lb isolated CTC using some sidewall accelerations from CLO11 and LE751 forcing functions Sidewall Mounted Liftoff Flight Event Low Frequency Random Vibration 1 Combination (RSS one axis 2 at a time) 3 Landing IDD Ny Nx Nz Nx 2.2. Isolated Ny 2.7. Nz Variational Coupled Loads Analysis considering the entire CTC cargo weight range and potential coupling to GAS Beam to be conducted in Phase II 54
55 Conclusions Liftoff Coupled Loads Analyses for the isolated CTC result in maximum net-load factors (including random) in the Xo, Yo and Zo directions of less than 3g s throughout both the ICC and LMC cargo manifest weight range Landing Coupled Loads Analyses for the isolated CTC result in maximum net-load factors in the Xo and Yo directions of less than 1.2 g s and Zo direction of 4.14 g s throughout both the ICC and LMC cargo manifest weight range 55
56 Conclusions - continued There is some coupling of the ICC and LMC platform Zo bending mode frequency and the CTC Zo isolation frequency (8 12 Hz depending on the cargo weight) and is mitigated by isolation system damping See Backup charts on stiff platform study Base-shake analysis for the sidewall mounted isolated CTC indicate similar reductions in CTC netload factors Coupled Loads Analyses for entire CTC weight range to be conducted in Phase II 56
57 Conclusions - continued OSS CTC design utilizing off the shelf robust Aeroflex wire rope isolators tuned to the 8-12 Hz region of the longeron dynamic environment significantly mitigates both transient and random vibrations while providing a stiff enough suspension to limit excessive relative motion ASD s Variational Coupled Loads Analysis capability can be utilized to determine the entire spectrum of response of the isolated CTC on other carriers such as the Express Pallet, ICC-V, ICC-L, and ULC 57
58 Back-up charts Zo Coupling with Stiff ICC Platform ICC Platform Stiffness artificially increased to force the isolated CTC / Integrated ICC frequencies to be better separated Landing Variational Coupled Loads Analysis re-conducted and results compared with nominal platform stiffness 58
59 CTC Zo Cargo Acceleration Spectrum Nominal Platform Stiffness ICC Landing VCLA 59
60 CTC Zo Cargo Acceleration Spectrum Increased Platform Stiffness ICC Landing VCLA 6
MASS LOADING EFFECTS FOR HEAVY EQUIPMENT AND PAYLOADS Revision F
MASS LOADING EFFECTS FOR HEAVY EQUIPMENT AND PAYLOADS Revision F By Tom Irvine Email: tomirvine@aol.com May 19, 2011 Introduction Consider a launch vehicle with a payload. Intuitively, a realistic payload
More informationSimplifying the Structural Verification Process to Accommodate Responsive Launch
AIAA- 5th Responsive Space Conference 2007 AIAA-RS5 2007-5003 Simplifying the Structural Verification Process to Accommodate Responsive Launch Thomas P. Sarafin and Poti G. Doukas Instar Engineering and
More informationImproved Mixed-Boundary Component-Mode Representation for Structural Dynamic Analysis - (Short Version of Briefing)
Improved Mixed-Boundary Component-Mode Representation for Structural Dynamic Analysis - (Short Version of Briefing) Arya Majed, Ph.D. Ed Henkel Applied Structural Dynamics, Inc. www.appliedstructuraldynamics.com
More informationU.S. Patents 6,290,217 6,244,579
CR CR Series Overview U.S. Patents 6,90,7 6,,579 For the best in vibration isolation capabilities, choose Enidine s. Smaller than traditional wire ropes, these unique isolators provide cost-effective,
More informationDynamics of structures
Dynamics of structures 2.Vibrations: single degree of freedom system Arnaud Deraemaeker (aderaema@ulb.ac.be) 1 Outline of the chapter *One degree of freedom systems in real life Hypothesis Examples *Response
More informationDesign of "KIBO" structure and verification
40th International Conference on Environmental Systems AIAA 2010-6144 Design of "KIBO" structure and verification Takayuki Shimoda 1 and Masaru Wada 2 Japan Aerospace Exploration Agency, Tsukuba, Ibaraki,3058505
More informationTracker Tower 01 Prototype Test & Analysis Overview
Tracker Tower 01 Prototype Test & Analysis Overview Erik Swensen June 19, 2002 HPS-102070-0002 Test Background Design Philosophy: Tracker Tower 01 Prototype was used as an engineering evaluation model
More informationSHOCK AND VIBRATION RESPONSE SPECTRA COURSE Unit 1B. Damping
SHOCK AND VIBRATION RESPONSE SPECTRA COURSE Unit 1B. Damping By Tom Irvine Introduction Recall the homework assignment from Unit 1A. The data.txt time history represented a rocket vehicle dropped from
More informationAPPLICATIONS OF HERMETICALLY SEALED FLUID DAMPERS FOR LOW LEVEL, WIDE BANDWIDTH VIBRATION ISOLATION
APPLICATIONS OF HERMETICALLY SEALED FLUID DAMPERS FOR LOW LEVEL, WIDE BANDWIDTH VIBRATION ISOLATION by Alan R. Klembczyk, Chief Engineer Taylor Devices, Inc. 90 Taylor Drive North Tonawanda, NY 14120-0748
More informationSpace mission environments: sources for loading and structural requirements
Space structures Space mission environments: sources for loading and structural requirements Prof. P. Gaudenzi Università di Roma La Sapienza, Rome Italy paolo.gaudenzi@uniroma1.it 1 THE STRUCTURAL SYSTEM
More informationEMA 545 Final Exam - Prof. M. S. Allen Spring 2011
EMA 545 Final Exam - Prof. M. S. Allen Spring 2011 Honor Pledge: On my honor, I pledge that this exam represents my own work, and that I have neither given nor received inappropriate aid in the preparation
More informationDEVELOPMENT OF SEISMIC ISOLATION TABLE COMPOSED OF AN X-Y TABLE AND WIRE ROPE ISOLATORS
DEVELOPMENT OF SEISMIC ISOLATION TABLE COMPOSED OF AN X-Y TABLE AND WIRE ROPE ISOLATORS 7 Hirokazu SHIMODA, Norio NAGAI, Haruo SHIMOSAKA And Kenichiro OHMATA 4 SUMMARY In this study, a new type of isolation
More information2.003 Engineering Dynamics Problem Set 10 with answer to the concept questions
.003 Engineering Dynamics Problem Set 10 with answer to the concept questions Problem 1 Figure 1. Cart with a slender rod A slender rod of length l (m) and mass m (0.5kg)is attached by a frictionless pivot
More informationChapter 10: Vibration Isolation of the Source
Chapter 10: Vibration Isolation of the Source Introduction: High vibration levels can cause machinery failure, as well as objectionable noise levels. A common source of objectionable noise in buildings
More informationDynamic Analysis Contents - 1
Dynamic Analysis Contents - 1 TABLE OF CONTENTS 1 DYNAMIC ANALYSIS 1.1 Overview... 1-1 1.2 Relation to Equivalent-Linear Methods... 1-2 1.2.1 Characteristics of the Equivalent-Linear Method... 1-2 1.2.2
More informationTransactions on the Built Environment vol 22, 1996 WIT Press, ISSN
A shock damage potential approach to shock testing D.H. Trepess Mechanical Subject Group, School of Engineering, Coventry University, Coventry CVl 5FB, UK A shock damage (excitation capacity) approach
More information6.003 Homework #6. Problems. Due at the beginning of recitation on October 19, 2011.
6.003 Homework #6 Due at the beginning of recitation on October 19, 2011. Problems 1. Maximum gain For each of the following systems, find the frequency ω m for which the magnitude of the gain is greatest.
More informationExperimental characterization of dry friction isolators for shock vibration isolation
PROCEEDINGS of the 22 nd International Congress on Acoustics Structural Acoustics and Vibration (others): Paper ICA2016-602 Experimental characterization of dry friction isolators for shock vibration isolation
More informationTRANSPORTATION RESEARCH PAPER VIBRATION EFFECTS ON UNITIZED CORRUGATED CONTAINERS. Forest Products Laboratory FPL 322.
TRANSPORTATION RESEARCH PAPER Forest Products Laboratory FPL 322 Forest Service VIBRATION 1978 U.S. Department of Agriculture Madison, Wis. EFFECTS ON UNITIZED CORRUGATED CONTAINERS Abstract A unitized
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 informationModeling and Experimentation: Mass-Spring-Damper System Dynamics
Modeling and Experimentation: Mass-Spring-Damper System Dynamics Prof. R.G. Longoria Department of Mechanical Engineering The University of Texas at Austin July 20, 2014 Overview 1 This lab is meant to
More informationDynamic Stress Analysis of a Bus Systems
Dynamic Stress Analysis of a Bus Systems *H. S. Kim, # Y. S. Hwang, # H. S. Yoon Commercial Vehicle Engineering & Research Center Hyundai Motor Company 772-1, Changduk, Namyang, Whasung, Kyunggi-Do, Korea
More informationA body is displaced from equilibrium. State the two conditions necessary for the body to execute simple harmonic motion
1. Simple harmonic motion and the greenhouse effect (a) A body is displaced from equilibrium. State the two conditions necessary for the body to execute simple harmonic motion. 1. 2. (b) In a simple model
More information(Total 1 mark) IB Questionbank Physics 1
1. A transverse wave travels from left to right. The diagram below shows how, at a particular instant of time, the displacement of particles in the medium varies with position. Which arrow represents the
More informationMOOC QP Set 2 Principles of Vibration Control
Section I Section II Section III MOOC QP Set 2 Principles of Vibration Control (TOTAL = 100 marks) : 20 questions x 1 mark/question = 20 marks : 20 questions x 2 marks/question = 40 marks : 8 questions
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 informationFORCE LIMITED VIBRATION TESTING
NOT MEASUREMENT SENSITIVE National Aeronautics and Space Administration JANUARY 31, 2003 FORCE LIMITED VIBRATION TESTING NASA TECHNICAL HANDBOOK Approved for Public Release Distribution is Unlimited Status
More informationShock isolation systems using non linear stiffness and damping
Shock isolation systems using non linear stiffness and damping D.F. Ledezma-Ramirez 1, M. Guzman-Nieto 1, P.E. Tapia-Gonzalez 1, N.S. Ferguson 2 1 Universidad Autonoma de Nuevo Leon, Facultad de Ingenieria
More informationAutomated Estimation of an Aircraft s Center of Gravity Using Static and Dynamic Measurements
Proceedings of the IMAC-XXVII February 9-, 009 Orlando, Florida USA 009 Society for Experimental Mechanics Inc. Automated Estimation of an Aircraft s Center of Gravity Using Static and Dynamic Measurements
More informationDesigning Mechanical Systems for Suddenly Applied Loads
Designing Mechanical Systems for Suddenly Applied Loads Abstract Integrated Systems Research May, 3 The design of structural systems primarily involves a decision process dealing with three parameters:
More informationA Sloping Surface Roller Bearing and its lateral Stiffness Measurement
A Sloping Surface Roller Bearing and its lateral Stiffness Measurement George C. Lee 1 and Zach Liang Abstract In this paper the laboratory performance and advantages of a new roller-type seismic isolation
More information6.003 Homework #6 Solutions
6.3 Homework #6 Solutions Problems. Maximum gain For each of the following systems, find the frequency ω m for which the magnitude of the gain is greatest. a. + s + s ω m = w This system has poles at s
More informationOrion MPCV E-STA Structural Dynamics Correlation for NASA NESC Andrew Doan, Brent Erickson, Trevor Owen Quartus Engineering
Orion MPCV E-STA Structural Dynamics Correlation for NASA NESC Andrew Doan, Brent Erickson, Trevor Owen Quartus Engineering 0 Abbreviations Structure E-STA: ESM Structural Test Article MVF: Mechanical
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 informationDEVELOPMENT OF ACTIVELY TUNED VIBRATION ABSORBER FOR WASHING MACHINE
DEVELOPMENT OF ACTIVELY TUNED VIBRATION ABSORBER FOR WASHING MACHINE Mr.G.M.ABHISHEK 1, Mr. K. S. MANOBALA 2 1M.E.product design and commerce, psg college of technology, Coimbatore, Tamilnadu, India 2Assistant
More informationEstimation of Unsteady Loading for Sting Mounted Wind Tunnel Models
52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference 19th 4-7 April 2011, Denver, Colorado AIAA 2011-1941 Estimation of Unsteady Loading for Sting Mounted Wind Tunnel
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 informationBack and Forth Motion
Back and Forth Motion LabQuest 2 Lots of objects go back and forth; that is, they move along a line first in one direction, then move back the other way. An oscillating pendulum or a ball tossed vertically
More informationGrandstand Terraces. Experimental and Computational Modal Analysis. John N Karadelis
Grandstand Terraces. Experimental and Computational Modal Analysis. John N Karadelis INTRODUCTION Structural vibrations caused by human activities are not known to be particularly damaging or catastrophic.
More informationContents. Dynamics and control of mechanical systems. Focus on
Dynamics and control of mechanical systems Date Day 1 (01/08) Day 2 (03/08) Day 3 (05/08) Day 4 (07/08) Day 5 (09/08) Day 6 (11/08) Content Review of the basics of mechanics. Kinematics of rigid bodies
More informationIntroduction 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 informationEXAMPLE OF PILED FOUNDATIONS
EXAMPLE OF PILED FOUNDATIONS The example developed below is intended to illustrate the various steps involved in the determination of the seismic forces developed in piles during earthquake shaking. The
More informationMSL PYROSHOCK DEVELOPMENT TEST PROGRAM FOR SHOCK MITIGATION. Juan Pablo Fernández
ICSV14 Cairns Australia 9-12 July, 2007 MSL PYROSHOCK DEVELOPMENT TEST PROGRAM FOR SHOCK MITIGATION Abstract Juan Pablo Fernández Jet Propulsion Laboratory, California Institute of Technology 4800 Oak
More informationCOMPOUND PENDULUM. AIM: 01. To determine the radius of gyration k of given compo pendulum. 02. To verify the relation
COMPOUND PENDULUM AIM: 01. To determine the radius of gyration k of given compo pendulum. 02. To verify the relation T= 2 π 2 2 K + (OG) g (OG) Where, T = Periodic time sec. K = Radius of gyration about
More informationExperimental Modal Analysis (EMA) on a vibration cube fixture M. Sc. Emanuel Malek Eindhoven November 2017
Experimental Modal Analysis (EMA) on a vibration cube fixture M. Sc. Emanuel Malek Eindhoven November 207 Test and Measurement Solutions Content Introduction Basics Why EMA? Preparation and execution Testing
More informationNorton-Thevenin Receptance Coupling (NTRC) as a Payload Design Tool
Norton-Thevenin Receptance Coupling (NTRC) as a Payload Design Tool Scott Gordon, NS/ Dan Kaufman, NS/ rya Majed, pplied Structural Dynamics, Inc. Spacecraft and Launch Vehicle Dynamic Environments Workshop
More informationAN OVERVIEW OF THE E.C.S.S. HANDBOOK FOR SPACECRAFT LOADS ANALYSIS
COMPDYN 2011 III ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering M. Papadrakakis, M. Fragiadakis, V. Plevris (eds.) Corfu, Greece, 25 28 May 2011
More informationSAMPLE CANISTER CAPTURE MECHANISM FOR MSR: CONCEPT DESIGN AND TESTING RESULTS INCLUDING 0-G ENVIRONMENT
SAMPLE CANISTER CAPTURE MECHANISM FOR MSR: CONCEPT DESIGN AND TESTING RESULTS INCLUDING 0-G ENVIRONMENT Authors: Riccardo Carta, Daniele Filippetto, Politecnico di Milano Co-authors: Prof. Michèle Lavagna,
More informationNonlinear 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 informationFigure 5.28 (a) Spring-restrained cylinder, (b) Kinematic variables, (c) Free-body diagram
Lecture 30. MORE GENERAL-MOTION/ROLLING- WITHOUT-SLIPPING EXAMPLES A Cylinder, Restrained by a Spring and Rolling on a Plane Figure 5.28 (a) Spring-restrained cylinder, (b) Kinematic variables, (c) Free-body
More informationEngineering 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 informationAppendix A Satellite Mechanical Loads
Appendix A Satellite Mechanical Loads Mechanical loads can be static or dynamic. Static loads are constant or unchanging, and dynamic loads vary with time. Mechanical loads can also be external or self-contained.
More informationFORCE LIMITED VIBRATION TESTING OF CASSINI SPACECRAFT COSMIC DUST ANALYSER
FORCE LIMITED VIBRATION TESTING OF CASSINI SPACECRAFT COSMIC DUST ANALYSER Heiko Jahn*, Swen Ritzmann*, Kurng Chang**, Terry Scharton** * German Aerospace Research Establishment, Institute for Space Sensor
More informationSystem Parameter Identification for Uncertain Two Degree of Freedom Vibration System
System Parameter Identification for Uncertain Two Degree of Freedom Vibration System Hojong Lee and Yong Suk Kang Department of Mechanical Engineering, Virginia Tech 318 Randolph Hall, Blacksburg, VA,
More informationSTRUCTURAL DYNAMICS BASICS:
BASICS: STRUCTURAL DYNAMICS Real-life structures are subjected to loads which vary with time Except self weight of the structure, all other loads vary with time In many cases, this variation of the load
More informationDEPARTMENT OF AEROSPACE ENGINEERING, IIT MADRAS M.Tech. Curriculum
DEPARTMENT OF AEROSPACE ENGINEERING, IIT MADRAS M.Tech. Curriculum SEMESTER I AS5010 Engg. Aerodyn. & Flt. Mech. 3 0 0 3 AS5020 Elements of Gas Dyn. & Propln. 3 0 0 3 AS5030 Aircraft and Aerospace Structures
More informationME 563 Mechanical Vibrations Lecture #1. Derivation of equations of motion (Newton-Euler Laws)
ME 563 Mechanical Vibrations Lecture #1 Derivation of equations of motion (Newton-Euler Laws) Derivation of Equation of Motion 1 Define the vibrations of interest - Degrees of freedom (translational, rotational,
More informationActive elastomer components based on dielectric elastomers
Gummi Fasern Kunststoffe, 68, No. 6, 2015, pp. 412 415 Active elastomer components based on dielectric elastomers W. Kaal and S. Herold Fraunhofer Institute for Structural Durability and System Reliability
More informationDynamics 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 informationDynamics and control of mechanical systems
Dynamics and control of mechanical systems Date Day 1 (03/05) - 05/05 Day 2 (07/05) Day 3 (09/05) Day 4 (11/05) Day 5 (14/05) Day 6 (16/05) Content Review of the basics of mechanics. Kinematics of rigid
More informationWire rope springs for passive vibration control of a light steel structure
Wire rope springs for passive vibration control of a light steel structure STEFANO PAGANO, SALVATORE STRANO Dipartimento di Ingegneria Industriale Università degli Studi di Napoli Federico II Via Claudio
More informationD : SOLID MECHANICS. Q. 1 Q. 9 carry one mark each. Q.1 Find the force (in kn) in the member BH of the truss shown.
D : SOLID MECHANICS Q. 1 Q. 9 carry one mark each. Q.1 Find the force (in kn) in the member BH of the truss shown. Q.2 Consider the forces of magnitude F acting on the sides of the regular hexagon having
More informationLecture 19. Measurement of Solid-Mechanical Quantities (Chapter 8) Measuring Strain Measuring Displacement Measuring Linear Velocity
MECH 373 Instrumentation and Measurements Lecture 19 Measurement of Solid-Mechanical Quantities (Chapter 8) Measuring Strain Measuring Displacement Measuring Linear Velocity Measuring Accepleration and
More informationRESEARCH REGARDING DAMAGE DETECTION IN THE INERTIAL DAMPERS OF THE ELECTRIC VEHICLE
6 th International Conference Computational Mechanics and Virtual Engineering COMET 2015 15-16 October 2015, Braşov, Romania RESEARCH REGARDING DAMAGE DETECTION IN THE INERTIAL DAMPERS OF THE ELECTRIC
More informationProb. 1 SDOF Structure subjected to Ground Shaking
Prob. 1 SDOF Structure subjected to Ground Shaking What is the maximum relative displacement and the amplitude of the total displacement of a SDOF structure subjected to ground shaking? magnitude of ground
More informationOPTI 521, Optomechanical Design, Technical Paper Reviews, Dr. Jim Burge, 2011
Synopsis of Predicting the vibration characteristics of elements incorporating Incompressible and Compressible Viscoelastic Materials Abstract Jacob Etter OPTI 521, University of Arizona, College of Optical
More informationC. points X and Y only. D. points O, X and Y only. (Total 1 mark)
Grade 11 Physics -- Homework 16 -- Answers on a separate sheet of paper, please 1. A cart, connected to two identical springs, is oscillating with simple harmonic motion between two points X and Y that
More informationNote that W is the skin surface weight density in units of psf. An equivalent graph in terms of metric units is given in Appendix A.
VIBRATION RESPONSE OF A CYLINDRICAL SKIN TO ACOUSTIC PRESSURE VIA THE FRANKEN METHOD Revision H By Tom Irvine Email: tomirvine@aol.com September 16, 2008 Introduction The front end of a typical rocket
More informationBulletin No. CCA/94. CCA Series Circular Arch Isolators. A New Concept in Shock & Vibration Control
Bulletin No. CCA/94 CCA Series Circular Arch Isolators A New Concept in Shock & Vibration Control The CCA Series Circular Arch Isolators... CCA-2 CCA-4 CCA-8 Developed from a unique family of Shock and
More informationVibration Testing of Small Satellites
Vibration Testing of Small Satellites This series of papers provides a tutorial along with guidelines and recommendations for vibration testing of small satellites. Our aim with these papers is to help
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 informationMAE106 Laboratory Exercises Lab # 6 - Vibrating systems
MAE106 Laboratory Exercises Lab # 6 - Vibrating systems Goals Understand how the oscillations in a mechanical system affect its behavior. Parts & equipment Qty Part/Equipment 1 Seeeduino board 1 Motor
More informationDynamics of Structures: Theory and Analysis
1. Free vibrations 2. Forced vibrations 3. Transient response 4. Damping mechanisms Dynamics of Structures: Theory and Analysis Steen Krenk Technical University of Denmark 5. Modal analysis I: Basic idea
More informationPRACTICE NO. PD-ED-1259 PREFERRED May 1996 RELIABILITY PAGE 1 OF 6 PRACTICES ACOUSTIC NOISE REQUIREMENT
PREFERRED May 1996 RELIABILITY PAGE 1 OF 6 PRACTICES Practice: Impose an acoustic noise requirement on spacecraft hardware design to ensure the structural integrity of the vehicle and its components in
More informationChapter 23: Principles of Passive Vibration Control: Design of absorber
Chapter 23: Principles of Passive Vibration Control: Design of absorber INTRODUCTION The term 'vibration absorber' is used for passive devices attached to the vibrating structure. Such devices are made
More informationLecture T2 The Pendulum-Based Start Gate (US 8,016,639 B2)
1 Lecture T2 The Pendulum-Based Start Gate (US 8,016,639 B2) INTRODUCTION Literally millions of Pinewood Derby races have been run since the inception of the race in 1953, mostly by Cub Scouts and their
More informationon the figure. Someone has suggested that, in terms of the degrees of freedom x1 and M. Note that if you think the given 1.2
1) A two-story building frame is shown below. The mass of the frame is assumed to be lumped at the floor levels and the floor slabs are considered rigid. The floor masses and the story stiffnesses are
More informationA Case Study of Modal Mass Acceleration Curve Loads vs. Sine Loads
A Case Study of Modal Mass Acceleration Curve Loads vs. Sine Loads Ramses Mourhatch Bing-Chung Chen Walter Tsuha Peyman Mohasseb Chia-Yen Peng Jet Propulsion Laboratory California Institute of Technology
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 informationName: Fall 2014 CLOSED BOOK
Name: Fall 2014 1. Rod AB with weight W = 40 lb is pinned at A to a vertical axle which rotates with constant angular velocity ω =15 rad/s. The rod position is maintained by a horizontal wire BC. Determine
More informationFEATURES APPLICATIONS DESCRIPTION QUICK REFERENCE DATA. PILKOR components
FEATURES Excellent anti-surge characteristics Stable characteristics to moisture resistance even in high resistance range. Good replacement for ceramic plate resistors. APPLICATIONS Telecommunication Industrial
More informationTYPE. max. working voltage 250 V 350 V 500 V 750 V. max. overload voltage 500 V 700 V 1000 V 1500 V. basic specifications IEC B
FEATURES Non inductive High pulse loading capability. APPLICATIONS Application for overload and high voltage surge hazard circuits. DESCRIPTION A carbon film is deposited on a high grade ceramic body.
More informationPROGRESS IN THE PREDICTION OF AEROSERVOELASTIC INSTABILITIES ON LARGE CIVIL TRANSPORT AIRCRAFT
ICAS 2000 CONGRESS PROGRESS IN THE PREDICTION OF AEROSERVOELASTIC INSTABILITIES ON LARGE CIVIL TRANSPORT AIRCRAFT M.LACABANNE, A.LAPORTE AEROSPATIALE MATRA AIRBUS, 31060 Toulouse Cedex 03, France Abstract
More informationSmall Satellite Deployments From STS116 - Development Of New Manned Spaceflight Deployment Systems
SSC07-III-1 Small Satellite Deployments From STS116 - Development Of New Manned Spaceflight Deployment Systems Perry G. Ballard, Albert Meza DOD Space Test Program Scott Ritterhouse, Theresa Shaffer, Carolynn
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 informationDynamic design of automotive systems: Engine mounts and structural joints
SaÅdhanaÅ, Vol. 25, Part 3, June 2000, pp. 319±330. # Printed in India Dynamic design of automotive systems: Engine mounts and structural joints R SINGH Department of Mechanical Engineering, Ohio State
More informationIDENTIFICATION OF FRICTION ENERGY DISSIPATION USING FREE VIBRATION VELOCITY: MEASUREMENT AND MODELING
IDENTIFICATION OF FRICTION ENERGY DISSIPATION USING FREE VIBRATION VELOCITY: MEASUREMENT AND MODELING Christoph A. Kossack, Tony L. Schmitz, and John C. Ziegert Department of Mechanical Engineering and
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 informationDetermination of accidental forklift truck impact forces on drive-in steel rack structures
Determination of accidental forklift truck impact forces on drive-in steel rack structures Author Gilbert, Benoit, J.R. Rasmussen, Kim Published 0 Journal Title Engineering Structures DOI https://doi.org/0.06/j.engstruct.00.0.0
More information! 2 = k a ! = 125, Problems and Solutions Section 5.3 (5.27 through 5.36)
5 3 Problems and Solutions Section 53 57 through 536) 57 A motor is mounted on a platform that is observed to vibrate excessively at an operating speed of 6000 rpm producing a 50N force Design a vibration
More informationA new seismic testing method E. Kausel Professor of Civil and Environmental Engineering, Massachusetts 7-277, OamWd^e, ^ 027 JP,
A new seismic testing method E. Kausel Professor of Civil and Environmental Engineering, Massachusetts 7-277, OamWd^e, ^ 027 JP, Introduction The bulleted enumeration that follows shows five experimental
More informationExploration Carriers UPC-Orion Launch Opportunities for Lunar Missions. presented to The Joint Annual Meeting of LEAG-ICEUM-SRR
Exploration Carriers UPC-Orion Launch Opportunities for Lunar Missions presented to The Joint Annual Meeting of LEAG-ICEUM-SRR Bruce Milam and Ruthan Lewis, Ph.D. NASA Goddard Space Flight Center October
More informationTrajectory Planning, Setpoint Generation and Feedforward for Motion Systems
2 Trajectory Planning, Setpoint Generation and Feedforward for Motion Systems Paul Lambrechts Digital Motion Control (4K4), 23 Faculty of Mechanical Engineering, Control Systems Technology Group /42 2
More informationDynamic Loads CE 543. Examples. Harmonic Loads
CE 543 Structural Dynamics Introduction Dynamic Loads Dynamic loads are time-varying loads. (But time-varying loads may not require dynamic analysis.) Dynamics loads can be grouped in one of the following
More informationVerification of assumptions in dynamics of lattice structures
Verification of assumptions in dynamics of lattice structures B.Błachowski and W.Gutkowski Warsaw, Poland 37th SOLD MECHANCS CONFERENCE, Warsaw, Poland September 6 1, 21 Outline of presentation 1. Motivation
More informationFigure XP3.1 (a) Mass in equilibrium, (b) Freebody diagram, (c) Kinematic constraint relation Example Problem 3.1 Figure XP3.1 illustrates a mass m
LECTURE 7. MORE VIBRATIONS ` Figure XP3.1 (a) Mass in equilibrium, (b) Freebody diagram, (c) Kinematic constraint relation Example Problem 3.1 Figure XP3.1 illustrates a mass m that is in equilibrium and
More informationCork 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 informationComputational Simulation of Dynamic Response of Vehicle Tatra T815 and the Ground
IOP Conference Series: Earth and Environmental Science PAPER OPEN ACCESS Computational Simulation of Dynamic Response of Vehicle Tatra T815 and the Ground To cite this article: Jozef Vlek and Veronika
More informationAP Physics 1 Dynamics Free Response Problems ANS KEY
AP Physics 1 Dynamics ree Response Problems ANS KEY 1. A block of mass m, acted on by a force directed horizontally, slides up an inclined plane that makes an angle θ with the horizontal. The coefficient
More information681. Design of elastomeric shock absorbers with a soft stiffness characteristics of type force-settlement
681. Design of elastomeric shock absorbers with a soft stiffness characteristics of type force-settlement V. Gonca 1, J. Shvab Riga Technical University, Ezermalas 6 d, LV-1006, Riga, Latvia E-mail: 1
More information