Proceedingsof the

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InternationalModalAnalysisConference

4th InternationalModal Analysis

ConferenceFebruary 3-6,1986

Los Angeles AirportMarriott Hotel

Los Angeles, CA

DIRECTOR:

Dominick J. DeMichele

UNION COLLEGE

Arnold E.S. Gussin, Dean, Graduate and Continuing StudiesRae D'Amelio, Administrator

Volume

Sponsored by:Union College

Schenectady, New York 12308

T A B L E O F C O N T E N T S

VOLUME 1

GENERAL SESSION PAGE

Keynote Address: "Future Directions in Modal Analysis" xv

S. R. Ibrahim

TECHNICAL PROGRAM

SESSION 1. EXPERIMENTAL CASE HISTORIES I

Illustration Of The Use Of Modal Assurance Criterion To Detect Structural 1Changes In An Orbiter Test Specimen

Walter M. WestThe Application Of Experimental Modal Analysis To Transmission Line Hardware 7

Paul Bourdon, Jean Brunelle, Claude Hardy, Pierre Lavigne

Determination Of Structural Damping In Straight Piping SectionsUsing Modal Analysis 14

A. G. Ware, G. L. Thinnes, J. G. Arendts

Modal Test Of A Propel!ant Tank 21

Shayan Pazargadi

SESSION 2. ANALYTICAL METHODS I

Nonlinear Analysis Of Two-Link Pendulum With Application To Robot Manipulator 24I. C. Chang

The Application Of The Time Domain Method In Strain Modal Analysis 31Tian-Xiang Song, P. Q. Zhang, W. Q. Feng, T. C. Huang

Design Sensitivity Analysis Of Vibration Modes By Finite Element Perturbation 38Su-huan Chen, H. H. Pan

Selection Of Initial Vectors For Subspace Iteration Method 44T. C.Cheu, C. P. Johnson, R. R. Craig, Jr.

SESSION 3. STRUCTURAL DYNAMICS MODIFICATIONS I

An Efficient Method Of Determining Rotational Degrees Of Freedom From Analytical And 50Experimental Modal Data

John C. O'Callahan, Inn-Wei Lieu, Peter Avitabile, Richard Madden /

Structural Modification: A Comparison Of Techniques 59Richard Jones, Kathleen Iberle

Invariant Theorem Of Relative Sensitivity Summation And Higher Order Sensitivity Analysis 66Applied To Structural Modification

Peng Zemin, Song Jianwei

A Study On The Vibration And Sound Of Bells With Slight Asymmetry 75

Yung-Ha Yum, Seock Hyun Kim, Jang Moo Lee

SESSION 4. LINKING ANALYSIS AND TEST I

Contrasts In Two Classes Of Structural Dynamic Correlation Procedures 81I. U. Ojalvo

Structural Integrity Testing Of Utility Poles Based On Modal Distribution 88D. E. Franklin, M. W. Murphy, R. A. Palylyk

Model Optimization With Measured Modal Data By Mass And Stiffener Changes 94W. Heylen

Modified Torsional Vibration Analysis Of Multi-Mass Shaft Systems 101Malay Ghosh, A. Rajamani

SESSION 5. PROCESSING MODAL DATA I

Automated Methods Of Frequency Response Function Quality Evaluation 107R. Gene Smiley, Gary B. Patrick, Richard C. Sohaney

Time Shift Frequency Domain (TSFD) Modal Analysis 113Francois Leonard

Generating Modal Parameters That Compensate For Residual Energy 119Brett A. Brinkman

Truncation And Time Delay Bias Spectral Estimation Errors In Structural Testing 123

Martin U. Trethewey

SESSION 6. SEISMIC TOPICS

Thermal Analysis Of Buried Piping 130Pirooz M. Joodi

An Evaluation Of Equivalent Linear Models For Modal Analysis Of Nonlinear Systems 137Subjected To Earthquakes

M. Saiidi, E. A. Maragakis

Seismic Qualification Of Motor Control Centers Based On Experimental Modal Analysis 143Craig D. Sellers

Seismic Analysis Of Multi-Span Piping 151

Bahman Lashkari, Ashish Karamchandani

SESSION 7. MODAL TEST METHODS I

An Improved Technique For Snapback Excitation Using Multiple Force Inputs 160Kenneth W. Hunter, Christine M. Linton, Patrick A. March

Modal Space Design For Active Vibration Control Of Large Flexible Structures 167Hagop V. Panossian

The Dynamic Optimum Design For The Surface Grinding Machine Structure 171Zheng Weizhong

A Study On The Vibration Characteristics Of Tennis Racket By Modal Analysis 177Jae Eung Oh, Sung Ha Yum, You Yub Lee

Single Mode Modal Identification Of Insufficiently Separated Modes 182An Interference Criterion

Julio M. Montalvao e Silva, Numo M. Mendes Maia

SESSION 8. MODAL TECHNIQUES FOR ROTATING MACHINERY I

Complex Modal Analysis In Turbine Design 189H-L. Olausson, B. J. Torby

Torsional Modal Analysis Of Free-Free Shafts Carrying An Arbitrarily Located Lumped Inertia 196Nader D. Ebrahimi

A Modal Model For Fatigue Crack Non-Destructive Testing 202Mohammad D. Al-Ansary, Kamal M. Azayem

Application Of Modal Analysis Methodology To Study Machining Process Stability of 209Machine Tools

Wang Guangfu, Peng Zemin

Multiplane Balancing Computer Program 217Miroljub Kovacevic

SESSION 9. EXPERIMENTAL CASE HISTORIES II

Dynamic Finite Element And Experimental Modal Analysis Of A Trashrack For Use In A Hiqh 223Velocity Flow

Rudolf R. Boentgen, Ben G. Allen, Allen G. Behring, Chang-Hua Yen

SESSION 9. EXPERIMENTAL CASE HISTORIES II CONT.

Natural Vibration Characterization As A Tool For Analysing And Preventing The Failures 233Of Components In Service - A Few Case Studies

S. K. Bhave, S. K. Goyal

Vibration Analysis Of The Yamachiche Lightpier 238F. D. Haynes

Antenna Suitability For Aircraft Installation 245Douglas E. McCoy

Vibrational Behavior Of A Night Vision Scope Machine Gun Mounting Bracket Assembly 251Joseph E. Ryan, Karl J. LaSala

Structural Damping Calculations Of A Laboratory Piping System Using Modal Analysis 257J. G. Arendts, A. G. Ware

SESSION 10. ANALYTICAL METHODS II

Modal Synthesis Of Components With Gaps 264Shi-Jin Zhu

Time Domain Modal Analysis Of Random Vibrations 270Tong Fang, Zhen-ni Wang

Direct Identification Of Modal Parameters From The Steady-State Or Free Response Data 276Tang Renzhong, Tong Zhongfang, Cheng Yaodong, Sun Yueming, Lu Naiyan

A New Dynamic FEM Of Frames Developed From Timoshenko Beam Model 283Yin Xuegang, Chen Huai

Time-Domain Identification Of Vibration Parameters 290Yao Yingxian

Study of Stress In Truss Wind Bracing By The Finite Element Method 297

Tamokoue Kamga, Kamga Fomo

SESSION 11. LINKING ANALYSIS AND TEST II

Experimental And Theoretical Modal Analysis On Two Versions Of A Twin Turboprop 303General Aviation Aircraft

Leonardo Lecce, Francesco MaruloAn Exact Integration Algorithm For Use With Modal Analysis 311

Ronald RodemanIdentification Of Dynamic Characteristics Of Joints 316

Zhao Chun-Sheng, M. Touratier, G. CoffinalAn Application For Vibration Isolation Of Rotating Machinery Using Computer Aided 329

Design Programs (VID)A. Nasser, A. El Khatib, S. Serag, H. Gaffer

Application Of Finite Element Analysis, Component Mode Synthesis And Modal Test Data In 334The Development Of Rotary Actuators In High Performance, 5.25 Inch Winchester DiskDrives

Douglas Fields, Lawrence Gollbach, Roger Stromsta

SESSION 12. SUBSTRUCTURING

The Prediction Of The Vibration Characteristics Of Robots 342I. M. Howard, B. J. Stone

Dynamic Response Of Non-Proportionally Damped Systems Using A Successive Transformation 349Technique

Robert Greif, Liren Wu

SESSION 12. SUBSTRUCTURE CONT.

A Modal Synthesis Method For Multi-Structure Systems 354

Weiji Wang, Shijing Zhu

Modeling Of Multi-Rotor Torsional Vibrations In Rotating Machinery Using Substructuring 360Fola R. Soares

The Dynamic Analysis And Experimental Research Of A Radar Antenna Frame 371

Xu Qingyu, Luo Xiaoyu, Qiou Yang

SESSION 13. EUROPEAN MODAL ANALYSIS TECHNOLOGY I

Modal Analysis Technique Used In Germany For Aerospace Structures 378N. Niedbal

Identification Of Physical System Matrices Using Incomplete Vibration Test Data 386Michael Link

Update And Identification Of Dynamic Mathematical Models 394B. Caesar

Time Domain Identification Of Incomplete Physical System Matrices Using A Condensed 402Estimation Equation

K. Badenhausen

Improvement Of Analytical Models With Input/Output Measurements Contra Experimental Modal 409Analysis

H. G. Natke

SESSION 14. MODELING STRUCTURES I

Modal Estimation Of Lumped Parameter Systems Using Vector Data Dependent System Models 414Sudhakar M. Pandit, Rock Helsel, Harold Evensen

Modelling And Parameter Identification Of Vibrating Systems In Dynamic Space 422Mingtao Xu, Ronald L. Huston

A Contribution To Identification Of Vibratory Systems 427Gwidon VI. Stachowiak

Method For Modifying Structural Dynamic Model By Means Of Incomplete Complex Modes 434Identified From Experimental Data

Huang Liping, Chen Kecheng, Xu Zhandi

An Investigation Of Nonlinear Damping Effects On Modal Analysis Results 439David J. Dimas, Gerard C. Pardoen, Michael Mitcheil-Dignan

Mobility Analysis Of Helical Coil Springs 446Y. Samim Unlusoy

SESSION 15. PROCESSING MODAL DATA II

A Comparative Study Of Identification Of Modal Parameters By TDM Using Single- And 453Multi-Excitations

P. Q. Zhang, W. Q. Feng, T. C. Huang

Global Frequency & Damping Estimates From Frequency Response Measurements 465Mark H. Richardson

ZMODAL: A New Modal Identification Technique 471Francois Leonard

A Method Of Determining The Modal Frequencies Of Structures With Coupled Modes 478Ole Dossing

Uses Of Rigid Body Calculations In Test 487John Crowley, David L. Brown, G. Thomas Rocklin

Modal And Structural Parameter Identification By Time Series Analysis Usinq Diqital 494Filtering 33

Tang Xiujin, Yuan Jingxia, S. M. WuIV

SESSION 16. NOISE/ACOUSTIC TOPICS I

Experimental Modal Analysis And Disc Drive Noise Reduction: A Case History 501Joe Castagna

A Modal Analysis Approach To Combustion Driven Oscillations 506D. J. Kato, R. A. Knepper

Comparison Of Predicted And Measured Acoustic Response Of Components Mounted On Sandwich 511Panels

Carolyn C. Trundle, Fei Hon Chu, Gregory F. Chilson, Jr.

Applications Of Modal Techniques To Noise Control Of Hermetic Refrigeration Compressors 515S. M. Price, R. J. Bernhard

Source Identification On A Digital Computer Using Acoustic Intensity 520A. Chawla, N. Popplewell

Reducing Turbo-Generator Noise And Vibrations With Dynamic Absorbers 526J. Morel, P. Thomas, R. Vincent, I. Vuong, J. Derom, J. Millouet

SESSION 17. ANALYTICAL METHODS III

The Machine Tool Rigidity Factor In Modelling A Computerised Machinability Data Base System 532M. Rahman, V. C. Venkatesh

A Contribution To Structural Dynamics By Means Of One Dimensional Elastic Waves 536A. Mioduchowski, M. G. Faulkner

A Minimum Norm Perturbation Method For The Modification Of Structural Analytic Model 541De-Wen Zhang, Ling-Cheng Zhao

On The Complex Modes Identification Of Arbitrary Systems Based On The Transfer Function 549Lu You-fang, Liu Man, Wang Pin

A Development Of Eigenvalue Perturbation Method For Linear Discrete Systems 556Qiu Xiangjun, Zhu Shijing

SESSION 18. MODAL TEST METHODS II

Comparison Of Multiple Input Random And Sine Excitation Methods For Aerospace Structures 563David L. Hunt, Bruce Wendler, Sam Soule

Experimental Modal Analysis With Stepped-Sine Excitation 572H. Van der Auweraer, P. Vanherck, P. Sas, R. Snoeys

GP-180 Wind Tunnel Flutter Test 581A. Mazzoni, M. Pizzamiglio

Multiple Input Modal Analysis Of Frequency Response Functions Based On Direct Parameter 589Identification

F. Lembregts, J. Leuridan, L. Zhang, H. Kanda

Modal Testing Of The Tjorn Bridge 599Sven Ohlsson

Application Of Impulse Excitation Method To Machine Tool Modal Analysis 606

Qinghong Sun, Si Zhang,Shaocheng Huo

SESSION 19. MACHINERY DIAGNOSTICS

Diagnosis Of Fractures In Machinery 611M. Kujath, Jiansen Li

Modal Analysis Of Cylindrical Bearings 617R. N. Dubey, B. G. Chalhoub

Pipeline Leak Detection Using System Identification 624Meng Luo Chen, H. R. Martin

Application Of Kurtosis To Damage Mapping 629E. Volker, H. R. Martin

SESSION 19. MACHINERY DIAGNOSTICS CONT.

A Probabilistic Approach To Achieve Protection Against Different Modes Of Transmission 634Line Vibration

R. K. Chan, P. R. Ukrainetz, M. W. Wilson

Structural Identification From Time Domain Simulations 641

Ken Fyfe, J. U. Thoma, F. Ismail

SESSION 20. COMBINED EXPERIMENTAL/ANALYTICAL MODELING

Modal Analysis Of A Shell-Payload Structure Using Test Data 646Thomas G. Carne, David R. Martinez, Mark D. Tucker, James P. Lauffer

Using Test And System Dynamic Analysis For Component Life Predictions 656Gary E. Townley, Joseph W. Klahs

A Superelement Approach To Test-Analysis Model Development 663Daniel C. Kammer, Christopher C. Flanigan, Wes Dreyer

A Global Technique For Estimation Of Modal Parameters From Measured Data 674

Robert N. Coppolino, Richard C. Stroud

SESSION 21. EXPERIMENTAL TECHNIQUES I

Determination Of Elastic Constants Of Orthotropic Plates By A Modal Analysis / 682Rayleigh-Ritz Technique

Lyle R. Deobald, Ronald F. GibsonStructural Dynamic Modifications Using Mass Additive Technique 691

Hiroshi Kanda, Max L. Wei, Randall J. Allemang, David L. BrownThe Statistical Variation Of Modal Parameters Within Production Units 700

James P. LaufferStudy On Load Effects Of Vibrating Substance On The Surface Of A Vibrating Screen Machine 708

By Mechanical Impedance MethodHan Erh-Chung, Guo Xing-Huie

SESSION 22. MODAL ANALYSIS OF NON-LINEAR STRUCTURES

Detection Of Nonlinear Dynamic Behaviour Of Mechanical Structures 712M. Mertens, H. Van der Auweraer, P. Vanherck, R. Snoeys

Identification, Applications, And Dynamic Analysis Of Nonlinear Spacecraft Components 720Ingo Kolsch, Horst Baier

The Analysis Of Hysteretic Systems With Reference To A Particular Model 730H. R. Lo, M. Yar, J. K. Hammond

Spectral Analysis Of A Randomly Excited Duffing System 736M. Yar, J. K. Hammond

Analysis Of Non Linear Structure By Programmed Impact Testing And Higher Order 743Transfer Function

Thanu Chouychai, Tuong VinhSESSION 23. FINITE ELEMENT ANALYSIS

Comparisons Of Finite Element Method And Experimental Modal Analysis Of A T Plate With 748Various Boundary Conditions

I. C. Wang, Max L. Wei, Jong-Chun Wei

Analytical And Experimental Modal Analysis Of Orthotropic Plate-Type Structures 754Donald A. Blessen, Gerard C. Pardoen

Vibration Response Of Commercial Electronic Equipment In Military Environments 7finJohn A. Habermeyer

Stress Analysis Of A Gear ToothM. L. Gambhir, A. K. Jindal

VI

767

SESSION 23. FINITE ELEMENT ANALYSIS CONT.

The Application Of Lagrangian And Updated Lagrangian Formulations To Pipe Whip Problems 773M. S. Gadala, M. Abo-Elkhier, M. M. Elmadany

Vibration And Chatter Analysis Of An NC Lathe 781Jang Moo Lee, Hu Sang Lee, Dong Chul Han, Sin Young Lee

SESSION 24. ANALYTICAL METHODS IV

Modal Analysis Of A Cantilever With Changing Stiffness And With Added Concentrated Mass 787P. Q. Zhang, Tian-Xiang Song, T. C. Huang

Parameter Adjustment Of A Finite Element Model By Means Of Measured Natural Frequencies 795F. Steinwender, R. Nordmann

Modal Analysis For A Pneumatic Loader Mechanism 802F. R. Gomaa, A. El Khatib, A. Nasser

A Frequency-Time Domain Modal Parameter Identification Technique 812Li Yue-feng

Maximum Entropy Spectral Line Estimation For Short Record Data Of Gear And Gear-Train 819Errors

Yuanhong Lan, Zhaotong Wu

A Perturbation Method For Dynamic Analysis Of Structures With Constrained Viscoelastic 826Layers

X. S. Cao, D. P. Dai, C. H. Ku

VOLUME II

SESSION 25. EUROPEAN MODAL ANALYSIS TECHNOLOGY II

Comparison Of Some Time Domain System Identification Methods For Free Response Data 831J. E. Cooper, J. R. Wright

Detection, Identification and Quantification Of Nonlinearity In Modal Analysis - A Review 837G. R.Tomlinson

The Methods Implemented At ONERA To Improve Airplane Ground Vibration Tests 844R. Dat, P. Lubrina

Quality Of Modal Analysis And Reconstruction Of Forcing Functions Based On Measured 850Output Data

H. Ory, H. Glaser, D. Holzdeppe

SESSION 26. ANALYTICAL METHODS V

Improved Starting Vectors For Subspace Iteration Eigensolution Using Dynamic Condensation 858John C. O'Callahan, Chaur-Ming Chou, Roger T. F. Koung

Global Parameter Estimation Using Rational Fraction Polynomials 864Richard Jones, Yuji Kobayashi

"The Mode Synthesis - Weighted Residual Method" For Solving The Dynamic Response Of A 870Multidegree-Of-Freedom System

Yin Xuegang, Li Bin

Coupled Bending Vibrational Characteristics Of An Idealized Vertical Pump Model 877Jang Moo Lee, Chan-Gi Pak, Jin Sun Hong

A Finite Element For Dynamic Analyses Of Beams And Space Frames 884Mats Olsson

Response Of Structures To Random Excitations In Time Domain 891Chang Jin, Gu Yi

SESSION 27. PROCESSING MODAL DATA III

The Hs Frequency Response Function Estimator 897Alfred L. Wicks, Havard Void

SESSION 27. PROCESSSING MODAL DATA III CONT.

Practical Application Of The Modal Confidence Factor To The Polyreference Method 900David L. Hunt, Ralph Brill hart

A Comparison Of Some Frequency Response Function Measurement Techniques 908J. Leuridan, D. De Vis, H. Van der Auweraer, F. Lembregts

Precorrection Of On-Line Measured Data And Modal analysis Of Machine Tool Structures 919B. H. Lu, Z. H. Lin, C. H. Ku

SESSION 28. NOISE/ACOUSTIC TOPICS II

Sound Power Measurement Of A Digital Computer Using Surface Velocity 924A. Chawla, N. Popplewell

Using Frequency Response Function Measurements To Predict Workpiece Noise Radiation 930During Face Mill ing

Thomas Moore, Jimi Sauw-Yoeng Tjong, Zygmunt Reif

A New Cepstrum Technique For Cancelling The Effects Of Sound Reflection 936Shaoquan Lin, Zhongyi Chen

Combination Of Structural Modification Techniques And Acoustic Radiation Models 943P. Van de Ponseele, P. Sas, R. Snoeys

A Study Of Noise Source Identification On Plate Excited By Structure-Borne Sound Using 952The Acoustic Intensity Method

Jae Eung Oh, Jun Chul Park, Sung Ha Yum

SESSION 29. VEHICULAR TOPICS

Some Problems About Acoustic And Vibration Comfort In Vehicle Design 957Attilio Garro, Emanuele Pellegrino, Vincenzo Vullo

Modal Analysis For Bending Vibration Of Vehicle Power Trains 965Wu Huile, Feng Zhendong, Li Chengde, Sun Fangning

A Study On Forced Torsional Vibration Of Automobile Power Train 972Wang Zhijun, Wu Huile

A Substructure Synthesis Method For Finding The Weak Points Of Complex Structure 979

Wu Jian-ji, Zheng Zhao-chang

SESSION 30. MODAL TEST METHODS III

Developments In Helicopter Ground Vibration Testing 984James A. Fabunmi

On Phase And Modal Parameter Measurement For Large Structures 993Zhong Liang, Qiang Gao, Daniel J. Inman

Natural Frequencies And Mode Shapes Of A Free Rectangular Plate As A Function of The 1000Aspect Ratio

Dan L. Gregory, David 0. Smallwood

Modal Parameter Estimation Using Difference Equations 1006B. J. Dobson

The Identification Of System Modal Parameters Of The Ship Hull Girder Vibrating In 1011Its Vertical Plane By The Sea Trial Time Series

Chang-Sheng Li, Wen-Jiunn Ko

Automotive Exhaust Pipe: The Modal Analysis Approach For Design And Testing 1020

Bruno Piombo, Giovanni Belingardi, Roberto Dardano, Marco Pavese

SESSION 31. FOUNDATIONS AND BASE TOPICS I

Basic Concept And Applications Of Base Isolation 1026I. G. Buckle, T. E. Kelly, L. R. Jones

VIM

SESSION 31. FOUNDATIONS AND BASE TOPICS I CONT.

Design and Cost/Benefit Issues For Seismically Isolated Structures 1036Ronald L. Mayes, Martin R. Button

Role of Base Isolation In The Aseismic Design Of Structures 1045

Nishikant R. Vaidya

SESSION 32. LINKING ANALYSIS AND TEST III

Model Refinement Using Test Data 1052Bo Ping Wang, Ting-Yu Chen, Fei Hon Chu

Coupling Of Lagrange Interpolation, Modal Analysis And Sensitivity Analysis In The 1058Determination Of Anisotropic Plate Rigidities

W. P. De Wilde, H. Sol, M. Van Overmeire

Analytical And Experimental Comparisons Of Modal Properties Of A Flood Water Storage Tank 1064G. L. Thinnes, W. T. Dooley, V. W. Gorman

Determination Of Boundary Conditions On African Xylophone Beams Using Modal Analysis 1071Josue Njock Libii

Identification Of The Damping Matrix For Tires 1078D. J. Inman, S. K. Jha

A Study On Non-Proportionally Damped Beams 1081

H. Nevzat Ozguven

SESSION 33. ANALYTICAL/EXPERIMENTAL MODAL ANALYSIS METHODS

Noise Transmission Into Enclosures 1088R. Vaicaitis, D. A. Bofilios

Identification Of System Physical Parameters From Force Appropriation Technique 1098Marc Thomas, Mounir Massoud, Jean-Guy Beliveau

The Static And Dynamic Analyses Of Machine Tools Using Dynamic Matrix Reduction Techniques 1104Velagala R. Reddy, Anand M. Sharan

On Transient Dynamics Of Rotors With Asymmetric Cross-Section Supported On Fluid Film m oBearings

J. S. Rao, K. V. Bhaskara Sarma

SESSION 34. MODAL ANALYSIS SOFTWARE

A Microcomputer Based System For Measuring Natural Frequencies And Mode Shapes Of 1117Structures

Dantam K. Rao

Software Architecture For A Multiple Input/Output Dynamic Signal Analyzer 1126Thomas Kraemer

Computer Aided Design Of Vibration Isolators Regarding Soil Interaction (VIO) H 3 2H. Gaffer, A. El Khatib, A. Nasser, S. Serag

Computer Aided Milling Machine Modal Analysis 1140Hsin-Yi Lai

Rigid Body Mode Enhancement And Rotational DOF Estimation For Experimental Modal Analysis 1149Masao Furusawa, Takashi Tominaga

Design Of A Highly Interactive Software Environment For Versatile Vibration Testing 1156And Signal Processing On Microcomputers

Paul Kopff

SESSION 35. EXPERIMENTAL TECHNIQUES II

Using And Understanding Electrodynamic Shakers In Modal Applications 1160Norman L. 01 sen

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SESSION 35. EXPERIMENTAL TECHNIQUES II CONT.

Modal Frequency Method In Diagnosis Of Fracture Damage In Structures 1168Frederick D. Ju, Mark Mimovich

Improvement To Monoreference Modal Data By Adding An Oblique Degree Of Freedom For 1175The Reference

Ole Dossing

SESSION 35. EXPERIMENTAL TECHNIQUES II CONT.

Non-Contact Stress Pattern Analysis Of Structures Loaded With Complex Waveforms 1181

D. E. Oliver, J. Gilbey, W. R. S. Webber

SESSION 36. MODELING STRUCTURES II

Structural Modifications Using Active And Passive Structural Elements 1187G. Dudley Shepard, John C. O'Callahan, Peter Avitabile

Development Of Uncoupling Technique And Its Application 1194N. Okubo, M. Miyazaki

Effects Of Helmet Weight And Center-Of-Gravity On The Vibratory Dynamics Of The 1201Head-Neck System: A Modeling Approach

Christopher D. Hayes, Jack F. Wasserman, Barclay P. ButlerNumerical Modelling For Acoustic Fields In Multimode Waveguide 1208

Vincent MartinModelling Of The Dynamic Processes Of Excavator 1215

Zhang Hui Jiao, Fang Dan Ping

Modelling Of Turbine Blades For Stress And Dynamic Analysis 1220Mohamed S. Gadala, Tom P. Byrne

SESSION 37. PROCESSING MODAL DATA IV

Computation Of Total Response Mode Shapes Using Tuned Frequency Response Functions 1228Ralph Brillhart, David L. Hunt

Some Applications Of Frequency Domain Polyreference Modal Parameter Identification Method 1237Lingmi Zhang, Hiroshi Kanda, Frans Lembregts

A Rectangular Plate Is Proposed As An IES Modal Test Structure 1246David 0. Smallwood, Dan L. Gregory

Virtual Coherence: A Digital Signal Processing Technique For Incoherent Source 1256Identification

S. M. Price, R. J. Bernhard

A Frequency Domain Holo-Estimation Method Of Vibration Parameters 1263

He Chang-An, Jiang Jie-Sheng, Gu Song-Nian

SESSION 38. STRUCTURAL DYNAMICS MODIFICATION II

An Investigation Of Structural Modification Using An H-Frame Structure 1268Steven M. Crowley, David L. Brown, Mehzad Javidinejad

Investigations Into The Effective Use Of Structural Modification 1279Stephan C. Ulm

The Estimation Of Rigid Body Mode Shapes For Use With Structural Dynamics Modification 1287David J. Macioce

A Perturbation Method For The Complex Mode Theory Of Linear Non-Conservative Dynamic 1292Systems

Zheng Zhao-chang, Tan Ming-yi

Determination Of Optimal Design Modifications Using Experimental Modal Parameters 1299Peter Gudmundson

SESSION 39. FOUNDATION AND BASE TOPICS II

Design And Testing Of Base Isolators 1305James M. Kelly

Modal Properties Of A Base Isolated Building 1312Gerard C. Pardoen, Gary C. Hart

Horizontal Isolation Of Sensitive Building Contents 1317K. L. Merz, J. C. Stoessel, J. Yagoubian, R. Haskell

Base Isolating High Frequency Seismic Events 1322Paul R. Millarke

Damped Modal Analysis Of Full Base Isolation 1327

K. Delinic

SESSION 40. LINKING ANALYSIS AND TEST IV

Modal Survey Test Of The Oriented Scintillation Spectrometer Experiment 1335David W. Paule

Critical Application Of The Error Matrix Method For Localisation Of Finite Element 1339Modeling Inaccuracies

HP. Gysin

Modal Analysis Of A Two Axis Gimbal: Finite Element Model Vs Test Results 1352John D. Gerber

A New Development On Transfer Function Fitting 1359Huang Dun-Pu, Liu Man

An Analytical Method For The Vibrational Frequencies Of Shells Having Uniformly 1367Distributed Holes

Luigi Papa, Riccardo Carcano

A Combined Method Of Testing And Analysis For Dynamic Qualification Of Equipment 1370K. Y. Shye, K. M. Skreiner

SESSION 41. MODAL TECHNIQUES FOR ROTATING MACHINERY II

Finite Element Modal Analysis Of Steam Turbine Blades 1374Jeffrey M. Steele

Types Of Rotors Fit And The Gyroscopic Moments Effect On Multi Disc Rotor Supported 1382On Several Bearing

E. M. Badawy, H. M. Metwally, F. K. Salman

Vibration Of Rotors - Noise of Measurement - Circularity And Coaxiality 1388Roland Bigret

Modal Testing And Parameter Identification Of Rotating Shaft/Fluid Lubricated 1393Bearing System

D. E. Bently, A. Muszynska

Computer Aided Fault Diagnosis In Turbo-Compressors Using Vibration Measurements 1403A. El Khatib, A. El Sayed

SESSION 42. TRANSDUCERS AND INSTRUMENTATION TOPICS

A Digital Data Input Channel For The Multiple Input Multiple Output Environment 1410Douglas W. Morton

Transducers And Instrumentation 1417Gunnar Rasmussen

Energy Transfer During Impact Testing 1424Andres Soom, Bor-Jenq Wang, Thomas Trachsler

A Study Of Digital Signal Processing Errors Caused By Improper ADC Settings 1432Timothy A. Mouch, Steve Akers, John Hicks

XI

SESSION 42. TRANSDUCERS AND INSTRUMENTATION TOPICS CONT.

A New Fibre Optic Sensor For Inprocess Measurement Of Machine Tool Vibration 1438T. I. El-Wardany

Modern Sinusoidal Frequency Response Analysis 1445Richard Lax

SESSION 43. MODAL ANALYSIS AND TESTING TOPICS

Determination Of Modal Parameters Of Bearings Supported On Hydrodynamic Bearings 1450Through Experimental Modal Analysis

R. Subbiah, R. B. Bhat, T. S. Sankar

Finite-Element Analysis And Testing Of Complex Busbar Structures Under Short-Circuit 1457Conditions

Mircea Iordanescu, Claude Hardy, Jean Nourry

Substructure Coupling Of Analytical And Test Models For An Experimental Structure 1463Francois Charron, Stephen J. Sorocky, Virendra K. Jha, Frank Vigneron,Helene Lapierre

Modal Analysis As A Tool To Evaluate Off-Road Vehicle Body Mounts 1471S. Sankar, S. Rakheja, J. Alanoly

Effects On Boundary Conditions On the Response Of a Structure 1476

M. S. Hundal

SESSION 44. MODAL TEST METHODS IV

Transient Modal Tuning 1482G. Dudley Shepard

Comparison Of Modal Test Results From Non-Contacting And Conventional Response Measurements 1487B. G. Musson, J. R. Stevens

Dynamic Performance Analysis And Optimization Of Damping Treatments On Printed Circuit 1494Board

Dai De Pei, Hu Xuan Li

Modal Analysis Of Inflatable Dams Under Hydrodynamic Conditions 1502A. D. Alwan

SESSION 45. MODAL TECHNIQUES FOR ROTATING MACHINERY III

A Comparative Study Of Vibration Monitoring Techniques For Rolling Element Bearings 1510M. A. Elbestawi, H. J. Tait

The Calculation Of Modal Balance Weights For Rotating Machinery 1518William C. Foiles

Application Of Modal Analysis To The Balancing Of Rotating Machines 1523Roland Bigret

The Dynamic Analysis Of Rotor-Bearing Systems Using Experimental Bearing Support 1531Compliance Data

L. E. Barrett, J. C. Nicholas, D. Dhar

Response Of A Rigid Disc Mounted On A Flexible Shaft Under Non-Linear Excitations 1536V. Steffen, Jr., F. P. Lepore N, E. B. Teodoro

Dynamic Analysis Of Large Rotor - Fluid Film Bearing - Elastic Foundation Systems Using 1540Component Mode Synthesis

Zhao-chang Zheng, Kui-yuan Ding, Ruo-jing Zhang

SESSION 46. STRUCTURAL DYNAMICS MODIFICATION III

On Changing Boundary Conditions J547Bo Ping Wang, Fei Hon Chu

Evaluation Of Optimum Stiffness And Damping For Structural Design Of Machine Tools 1553M. Rahman, V. Narayanan, V. C. Venkatesh

XII

SESSION 46. STRUCTURAL DYNAMICS MODIFICATION III CONT.

Dynamic Stress Analysis And Fatigue Life Prediction For Structures Subjected To 1558Random Excitations

Guan Fei, Chen Ping

Bond-Graph Modelling - A New Approach To The Structural Dynamics Problem 1564Pranab K. Sen, Dipankar Chandra

Eigenparameter Analysis Of Beams With Different End Conditions 1572M. M. F. Yuen

SESSION 47. ANALYTICAL METHODS VI

A Numerical Technique For Nonlinear Eigenvalue Equations With Complex Roots And Its 1577Application To Fluidelastic Vibration

T. T. Wu

On The Dynamic Similtude Laws In Vibrational Modal Analysis Of Structures 1582Li Debao

Global Modal Parameter Estimation Methods: An Assessment Of Time Versus Frequency 1586Domain Implementation

J. Leuridan, J. Lipkens, H. Van der Auweraer, F. Lembregts

On Fitting Continuous Model Of Time Series For Modal Parameter Identification 1596Yang Shuzi, Zhao Xing, Wang Zhifan, Yang Kechong

Identification Of Vibration Parameters Using Nonstationary-Response 1601Yao Yingxian

A Component Mode Synthesis Method Using The Retransformed Physical Coordinates 1609

Etsujiro Imanishi, Takeshi Fujikawa, Yoshihiro Hamazaki, Hiroshi Zui

SESSION 48. DESIGN METHODS

Optimal Redesign Of Dynamic Structures Via Sequential Linear Programming 1615Kyong B. Lim, John L. Junkins

Modal Analysis Of A Moving Band Under Cutting Loads 1621W. Z. "Ben" Wu, C. D. Mote, Jr.

Dynamic Vibration Absorbers For Reducing Resonance Amplitudes Of Hysteretically 1628Damped Beams

Bulent Candir, H. Nevzat Ozguven

Active Structural Modification Using Multivariable Feedback Design Technique 1636G. Dudley Shepard

The Study Of Vibration Characteristics Of A Whole Truck 1640Li Tong, Li Cheng De, Yu Hui Ran

Modal Control Of Flexible Structures Using Modal Residualization Technique 1653Chang Jin, Gu Yi

BIBLIOGRAPHIES

Modal Analysis Bibliography - 1979-1984 1659Leanne D. Mitchell, Larry D. Mitchell

Modal Analysis Bibliography—An Update--1980-1984 (Reproduced from IMAC-III Proceedings) 1691Leanne D. Mitchell, Larry D. Mitchell

Modal Analysis Bibliography—An Update—1980-1983 (Reproduced from IMAC-II Proceedings) 1705Leanne D. Mitchell, Larry D. Mitchell

Experimental Modal Analysis Bibliography (Reproduced from IMAC-I Proceedings) 1722R. J. Allemang

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