Proceedingsof the

III I III II IMI II I AIII IC

InternationalModalAnalysisConference

8th InternationalModal Analysis

Conference

January 29 - February 1,1990

Hyatt OrlandoKissimmee, Florida

UNIVERSITATSBIBUOTHEKHANNOVER

TECHNI3CHEINFORMATIONSB1BUOTHEK

Directors:Dominick J. DeMichele

Union CollegeDr. Arnold E. S. Gussin, Dean, Graduate & Continuing StudiesRae D'Amelio, Administrator

Society for Experimental Mechanics, Inc.Kenneth A. Galione, Managing Director

Volume 2

Sponsored By:UNION COLLEGESchenectady, N.Y. 12308

Society for Experimental Mechanics, Inc.

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

PAGE NO.

GENERAL SESSION

Identification Challenges For Large Space Structures xv-xxiiiR. S. Pappa

SESSION 1. EXPERIMENTAL CASE HISTORIES I

Upgrade Of Modal Test Facility For Dynamic Testing Of Spacecraft Structures 1-7C. R. Voorhees

Experimental And Theoretical Study On Damped Joints In Truss Structure 8-14S. Sekimoto, F. Kuwao, H. Mitsuma, A. Tsujihata

Correlation Between Subjective And Objective Measurements Of Steering Column Shake 15-21To Determine Design Specifications For The Steering Column Structure

T. A. Mouch, C. J. Jarocki

SESSION 2. ANALYTICAL METHODS I

A Generalised Reduction Method For Modal Testing 22-27A. Urgueira, N. A. J. Lieven, D. J. Ewins

Mathematical Base Of Random Decrement Technique 28-34J. C. S. Yang, G. Z. Qi, C.-D. Kan

Physical Interpretation And Application Of A Component Modal Synthesis 35-42Technique (Modal Force Method)

Y. G. Tsuei, E. K. L. Yee, A. C. Y. Lin

SESSION 3. STRUCTURAL DYNAMICS MODIFICATION I

Understanding Structural Dynamics Modification Truncation 43-54P. Avitabile, J. O'Callahan, F. Pechinsky

Dynamic Analysis Of Continuous Beams With Singularities In Mass And 55-61Stiffness Distribution

M. Abdel-Mooty, J. Roorda

SESSION 4. LINKING ANALYSIS AND TEST I

Model Improvement By Using Substructure Modal Testing Results—Case Study 62-66C. Minas, D. J. Inman

Modal Analysis Of A Robot Arm Using Finite Element Analysis And Modal Testing 67-70S. C. Kolhatkar, R. G. Budynas

Space Shuttle Payload Trunnion Interface Verification Test And Correlation 71-76Fixed Based Responses

M. A. Blair, N. Vadlamudi

SESSION 5. PROCESSING MODAL DATA I

Effects Of Truncation Of Modes On Eigenvalue Modification 77-82D. Ragnitz, V. W. Snyder

Quality Assurance Of An Automatic, Quasi-Real-Time Modal Analysis System 83-89Y. W. Luk, J. Z. Qu

Computer Simulation Of Torsional Waves In Nonhomogeneous Multi Mass Drive Systems 90-94A. Mioduchowski, G. M. Faulkner

SESSION 6. MODAL TEST METHODS I

An Experimental Modal Testing/Identification Technique For Personal Computer 95-101M. J. Roemer, S. T. Schlonski, D. J. Mook

Enhancement Of Modal Swept Sine Data By Control Of Exciting Forces 102-108G. C. Foss

Experimental Modal Testing And Analysis Of Continuously Supported Structures 109-114M. R. Chowdhury

SESSION 7. SYSTEM IDENTIFICATION I

On Predicting And Improving The Condition Of Modal-Model-Based Indirect Force 115-120Measurement Algorithms

J. M. Starkey, M. Hansen

The High-Frequency Behaviour Of Frequency Response Functions And Its Effect 121-130On Their Hilbert Transforms

K. Worden, G. R. Tomlinson

A Time Domain Method For Experimental Determination Of The Impulse Response 131-135Function

M. Archibald, A. L. Wicks

Sequential Modification Of Dynamic Characteristics For Complex Structures 136-139J. Hou, Z. Feng, C. Fang

Some Considerations In The Dynamic Modification Of Large Complicated Structures 140-144R. Zhu, Z. D. Xu, K. Chen

SESSION 8. MODAL TECHNIQUES FOR ROTATING MACHINERY I

The Use Of Piezoelectric Actuators For Active Vibration Suppression In 145-147Rotating Machinery

A. B. Palazzolo, R. R. Lin, A. F. Kascak, G. Montague

A New Modal Test Theory In Rotating Machinery 148-154C.-W. Lee

Modal Analysis Of Rotating Elastic Structures 155-160C. Surace, G. Surace

Large-Amplitude Oscillations Of A Spinning Disk—Experimental Investigation 161-167M. Swaminadham

Effect Of The Differential Boundary Condition On Non-Synchronous Resonance 168-172In The Modal Synthesis Method

Z. Gu, J. Gao

SESSION 9. LINKING ANALYSIS AND TEST II

Practical Application Of The UA Model Updating Scheme 173-179T. Janter, W. Heylen, P. Sas

Parametric Updating Of Finite Element Model Using Experimental Simulation-- 180-186A Dynamic Reaction Approach

H. Berger, R. Ohayon, L. Barthe, J. P. Chaquin

An Approach To The Reconciliation Of Finite Element And Modal Test Studies 187-194M. Nash

Comparison Of Expansion Methods For FE Modeling Error Localization 195-204H. Gysin

Investigation Into Exact Normalization Of Incomplete Complex Modes By 205-212Decomposition Transformation

S. R. Ibrahim, U. Fullekrug

SESSION 10. SUBSTRUCTURING I

Coupling Of Structures Using Measured FRF's By Means Of SVD-Based Data 213-220Reduction Techniques

D. Otte, J. Leuridan, H. Grangier, R. Aquilina

Use Of Mode Orthogonal ization And Modal Damping In Flexible Multibody Dynamics 221-2280. Friberg, V. Karhu

Dynamic Analysis Technique Of Centrifugal Impeller With Split Blades 229-233J. Zhang, W.-L. Wang, X.-J. Chen

Impulse Test Truncation And Exponential Window Effects On Spectral And 234-240Modal Parameters

M. W. Trethewey, J. A. Cafeo

Sensitivity Analysis Of Robot Modal Properties Using Low-Order Component Mode 241-247Synthesis

D. A. Johnson, C. W. Jen

Case Study Of The Comparisons Of Modal Force Method And Modal Modeling In 248-254Modal Synthesis

A. C. Y. Lin, E. K. L. Yee, Y. S. Gu, Y. G. Tsuei

Combined Modal Synthesis Techniques And Residual Flexibility For Large 255-262Structures

M. Elnomrossy

SESSION 11. NOISE/ACOUSTICS TOPICS

Prediction Of Acoustic Power Using Modal Analysis: A Case Study On A Plate 263-269Treated With Constrained Layer Damping

D. Battazzo, 0. McDaniel

Acoustic Sensitivity Analysis Based On The Results Of Acoustic Modal Testing 270-274N. Okubo, K. Masuda

Acoustical Emission Control Of Metal Plates Using Modal Analysis To Distribute 275-278Visco-Elastic Materials

L. Garibaldi, B. Piombo, G. L. Liu

An Analytical Calculation Method Of Acoustic Radiation From A Clamped Layered 279-285Circular Plate Contacting With Inviscid Fluid

Y.-S. Park, H.-K. Lee

A Method Of Reducing Structural Noise Through By Changing Modal Bending 286-289Strain Energy

J. X. Huang

SESSION 12. EXPERIMENTAL TECHNIQUES I

An Analysis Of The Monophase Operating Shapes Of A Highly-Damped Structure 290-294J.-H. Pan, R. Allemang, H. Void

An Identification Technique For Operating-Modes On A Loudspeaker Cabinet Applied 295-3060. Dossing

Operating Shape Estimation As A Function Of Dynamic Loads 307-312J.-H. Pan, R. Allemang, H. Void

Characterization Of Power Flow In A Frame Structure 313-321J. P. DeClerck, D. E. Soine, C. Van Karsen, H. A. Evensen

Modal Test Of A Large Spacecraft Using A Mass Loaded Interface 322-328J. Haughton, J. Hauser, L. Turner

A Logical Means Of Controlling An Enormous Amount Of Data--250 Points, 329-3333 Inputs, No Problem!

T. A. Mouch

IV

SESSION 13. NONLINEAR STRUCTURES I

Non-Linear Modal Synthesis In Frequency Domain 334-340L. Jezequel, H. D. Setio, S. Setio

Analysis Of Nonlinear Systems Using ARMA Models 341-347N. F. Hunter, Jr.

Parameter Identification Of Nonlinear System In The Frequency Domain 348-351J. Tang

Using Multiple Input/Output Analysis To Estimate Parameters Of Linear 352-357Systems With Additional Nonlinear Components

D. F. Bella, G. C. Pardoen

On The Location Of Structural Nonlinearity From Modal Testing--A 358-364Feasibility Study

R. M. Lin, D. J. Ewins

SESSION 14. PROCESSING MODAL DATA II

Force Determination With Slope And Strain Response Measurement 365-372M.-C. Han, A. L. Wicks

Selective Vibration Parameters Identification Method 373-375G. Zheng, W. Huang, C. Shao

A Spatial Curve Fitting Technique For Estimating Rotational Degrees Of Freedom 376-381E. J. Williams, J. S. Green

Application Of A Multidimensional ARMA Model To Modal Analysis Under Natural 382-388Excitation

D. Bonnecase, M. Prevosto, A. Benveniste

SESSION 15. MODELING STRUCTURES I

Using Experimental Normal Modes For Analytical Model Updating 389-396M. Brughmans, F. Lembregts

Vibration And Wave Propagation Characteristics Of Multisegmented Elastic Beams 397-402A. N. Nayfeh, M. A. Hawwa

Hybridization Of Finite Element Method With Experimental Modal Analysis And 403-406Its Application In Modeling Of Structure

K. Li, Z. Xu

SESSION 16. ANALYTICAL METHODS II

A Global Partial Fraction Curve Fitting Using Frequency Response Functions 407-412G. L. Liu, L. Garibaldi

Operational Deflection Shapes In Multisource Environments 413-421D. Otte, P. Van de Ponseele, J. Leuridan

Comparison Of Reduced Model Concepts 422-430J. O'Callahan

An Analytical Model Of Dynamic Characteristics For Fluid-Filled Tanks With 431-434A Flexible Bottom Plate

L. Bo

SESSION 17. MODAL TECHNIQUES FOR ROTATING MACHINERY II

On Measuring Frequency Response Functions And Modal Parameter Identification On 435-444Rotating Discs

P. Ebersbach, H. Irretier

Experimental And Analytical Study Of Shaft Cracking Response In Rotatory Machines 445-450L. A. San Juan, P. Saavedra

Asymmetry Of A Mode That Is Considered To Be Symmetrical 451-454W. G. Brown, D. R. Morrison

Prohl Transfer Matrix-Newmark Formulation Integration Method For Rotor Dynamics 455-459Z. Gu, S. Chen

SESSION 18. SEISMIC TOPICS

Multiple-Fracture Configurations Of A Beam Column Subject To Earthquake 460-467Y.-M. Lu, F. D. Ju

Analysis Of Liquid And Helical Spring Shock Isolation Systems Used To Isolate 468-473An Underground Structure

M. L. Wang, D. L. Swanson

Effect Of Void Ratio On Dynamic Soil Properties Using An Improved FFT Technique 474-478F. Amini

Modal Response Of Earth Retaining Structures 479-486

A.-W. Elgamal, P. Van Laak, S. Alampalli

SESSION 19. ANALYTICAL METHODS III

Modal Filter: Concept And Applications 487-496Q. Zhang, R. J. Allemang, D. L. Brown

Evaluation Methods Of Reduced Models 497-503M. K. Abdelhamid, S.-S. Chiang

Stationary Response To Multi-Correlated Filtered Noise Excitation 504-508Z. N. Wang, T. Fang, T. S. Zhang

Steady State Vibration Of Oscillators With Motion Limiting Constraints 509-514S. Natsiavas

Approach To Model Damping In Structural Analysis 515-521F. Kuster, Hp. Gysin

Finite Element Analysis Of Free Vibrations Of Laminated Composite Plates 522-529M. J. Kim, A. Gupta

SESSION 20. SYSTEM IDENTIFICATION II

The Identification Of The Nonlinear Dynamical Behaviour Of A Flexible Robot Link 530-539K. Wyckaert, P. Vanherck, P. Sas, H. Van Brussel

Comparison Of Time Domain Modal Identification Methods 540-546B. Bagus, L. Jezequel

Identification Of Physical Parameters Of A Mechanical Structure From Time 547-553Domain Data

N. Zhang, S. Hayama

Efficient Solution of 111-Conditioned Equations Arising In System Identification 554-558I. U. Ojalvo

Establishment Of Flow-Induced Vibration Prediction Model Of The Beam And 559-564Exciting Force Identification

D. Li, H. Zhuge, M. Su, Y. Zhang, B. Sun

Complete Identification Of Physical Parameters Of Linear Structure 565-569K. Li, Z. Xu

SESSION 21. LINKING ANALYSIS AND TEST III

Identification And Correction Of Errors In Analytical Models Using Test 570-578Data--Theoretical And Practical Bounds

M. Link

VI

Localization Methods For Parametric Updating Of Finite Element Models 579-585G. Lallement, J. Piranda

Updating A Finite-Element Model By Means Of Normal Mode Parameters 586-592N. Niedbal, E. Klusowski, W. Luber

Error Localization And Mathematical Model Updating At FSS And The NLR 593-597A. de Boer, M. H. M. Ellenbroek, J. J. Wijker

Application Of Sensitivity Methods For Error Localization In Finite 598-604Element Systems

W. Luber, A. Lotze

Expansion Of Modal Data For Correlation 605-609

N. A. J. Lieven, D. J. Ewins

SESSION 22. FINITE ELEMENT ANALYSIS I

A Finite-Element Approach To Composite Panel Flutter 610-616C. Surace, G. Surace

Finite Element Studies Of Single Cavity Acoustic Absorbers 617-621R. W. Harrison

Eigensensitivity Analysis For Space Structures 622-628J. W. Hou, S. P. Kenny

On The Performance Of Various Beam Mass Matrices 629-637K.-J. Young, L. D. Mitchell, J. B. Kosmatka

Fundamental Natural Frequencies For Plane Frames Supported By Elastic 638-644Foundation

A. I. M. Aljanabi, F. A. Alshawi, B. J. M. Farid

Study On Estimation Methods Of Floor Structure Vibration—Vibrational 645-651Characteristics Of Orthogonal Anisotropic Floor Structures

T. Abe, T. Hiromatsu, H. Kushida

SESSION 23. MODAL TEST METHODS II

Detection And Location Of Structural Cracks Using FRF Measurements 652-657M. A. Mannan, M. H. Richardson

Reflections On Some SDOF Modal Analysis Methods 658-666N. M. M. Maia

Comparison Of Modal Analysis Measurements With Microphone And Accelerometer On 667-672Hammer-Impacted Structures

G. Bissinger, M. R. Chowdhury

Avoiding Stinger Rod Resonance Effects On Small Structures 673-678I. A. Anderson

Using Time-Averaged Modal Excitation To Determine The Rotor Dynamic Bearing 679-684Coefficients Of Centrifugal Pumps

C.-W. Jen, W. D. Marscher

Dynamical Tests Of A Bearing Assembly And Nonlinear Analysis 685-689

X. Ma, J. Yuan, P. Liu

SESSION 24. MODELING STRUCTURES 1

The Random Structural Response Of A MDF System With Stiffness And 690-696Strength Degradation

S.-L. Lu, F. D. JuLinear And Non-Linear Dynamic Models Of A Geared Rotor-Bearing System 697-703

A. Kahraman, R. Singh

VII

Force And Moment Transmissibilities Through Rolling Element Bearings In A 704-710Single-Stage Rotor System

T. C. Lim, R. Singh

Modeling The Dynamic Characteristics Of Universal Tool Milling Machine 711-717And Design Optimization

B. Liao, Y. Liao, S. Wang

Modeling Procedure Of Analysis And Test Of Automobile Dynamics 718-724Z. Hu, W. Sha, S. Cheng

Dynamic Modeling Of Mistuned Bladed Disk Assemblies 725-730Z. Zeng, Y. Li

Dynamical Modeling Of Stator Winding End Baskets Of Large Turbo-Generator 731-734J. Zhu, Y. Wang

SESSION 25. SPACE STRUCTURES I

Modeling And Tachometer Feedback In The Control Of An Experimental Single 735-740Link Flexible Structure

E. Garcia, D. J. Inman

Dynamic Investigations On Satellite Tank Structures Filled With Liquid 741-749E. Hornung, S. Dieker, H. Wenz

Employment Of Combined Finite Difference Finite Element Methods For The 750-759Analysis Of Thermal Problems In Spacecraft Structurer

E. Fissette, M. Vidussoni, M. Klein, 0. Brunner, C. Stavrinidis

SESSION 26. ANALYTICAL METHODS IV

An Efficient Method For Forced Nonlinear Response Using A Structural Dynamic 760-768Modification Technique

P. Avitabile, J.n O'Callahan

Error Location And Updating Of Finite Element Models Using Singular 769-773Value Decomposition

N. A. J. Lieven, D. J. Ewins

Sensitivity Of Spatial Strain Distribution To Modal Parameters 774-779D. Vandepitte, P. Sas

Step-By-Step Perturbation Method For Reanalysis Of Linear Generalized 780-783Eigenvalue Problem

Z. Feng, Z. Lu

Modal Analysis Problems In The Nonuniform Inertial Field 784-787Y. Lu, B. Wang

SESSION 27. SYSTEM IDENTIFICATION III

Free Body Structural System Identification Using Constrained Test Data 788-791A. Berman

An Unifying Approach For Modal Identification Using The Prediction Error Method 792-797C. F. Cremona, J. A. Brandon

Sensitivity Of Model Parameters To Data Perturbations 798-808H. Van der Auweraer, H. Van Dessel

System Identification From Output Measurements 809-813A. Rytter, J. L. Jensen, L. P. Hansen

Identification Of Physical Parameters Of Vibration System By Means Of 814-818Solving Inverse Eigenvalue Problems

J. Zhang, Z. Chen

An Efficient Identification Method Of Modal Parameters--ARMAV Model Method 819-826P. Q. Zhang, Q. J. Yang, C. Q. Li, T. C. Huang

Vlll

SESSION 28. LINKING ANALYSIS AND TEST IV

Modeling Of A Precision Drilling Machine With A Moving Load Finite Element 827-832Model And Experimental Modal Data

Y.-H. Lin, M. W. Trethewey, J. R. Rieker

On The Influences Of The Branch Pipe In The Pipe System Upon The Air Column 833-835Resonant Frequencies

W. Zheng, Z. Zheng

Updating Structural Parameters Of A Finite Element Model By Adding Mass Or 836-842Stiffness To The System

N. G. Nalitolela, J. E. T. Penny, M. I. Friswell

Updating Model Parameters Directly From Frequency Response Function Data 843-849M. I. Friswell, J. E. T. Penny

SESSION 29. VEHICULAR

Using Real Time Animation And Experimental Modal Analysis To Influence The 850-856Design Of An Automotive Door Based Upon Durability Requirements

T. A. Mouch, W. D. Myers

Light Truck Body Mount Parameter Reanalysis 857-863J. C. Caris, S. D. Gray, J. M. Starkey

Theoretical And Experimental Study Of The Influence Of Furniture Elements 864-870On The Modal Properties Of An Underground Vehicle

B. Marguet, P. Level, Y. Ravalard, J. Oudin

Modal Analysis Of V-6 Engine Using In-Situ Impulse Test Data 871-877S. M. Pandit, Z. Hu, P. A. Schilke

Further Study On Modal Analysis About Vehicle Frame 878-883

W. Li, F. Liu, F. Li

SESSION 30. FUNDAMENTALS OF MODAL ANALYSIS

Errors In Using Force Transducers 884-890K. G. McConnell

Complex Modes: A Review 891-899L. D. Mitchell

Considerations In Accelerometer Application To Modal Analysis 900-904P. L. Walter

An Introduction To Shaker Shock Simulations 905-911J. D. Rogers

SESSION 31. SPACE STRUCTURES II

Modal Test And Correlation Of The Commercial Titan Dual Payload Carrier 912-918R. D. Brillhart, A. M. Freed, D. L. HuntT. L. Chism

Development And Implementation Of A Shuttle Modal Inspection System 919-925D. L. Hunt, T. A. Dunlap, S. P. Weiss, W. M. West

Simulation Of On-Orbit Modal Tests Of Large Space Structures 926-932P. Blelloch, C. Engelhardt, D. L. Hunt

Combined High Level Acoustic And Mechanical Vibration Testing and Analysis 933-939J. Haughton, A. Salzberg

SESSION 32. STRUCTURAL DYNAMICS MODIFICATION II

Predicting The Effect Of Structural Modification: Upper And Lower Bounds Due 940-945To Modal Truncation

S. G. Braun, Y. M. Ram

Optimization Of Structural Redesign With Dynamic Constraints 946-953W. Wang, Q. Zhang, R. J. Allemang, D. L. Brown

Sensitivity Analysis Of Structural Random Response Functions 954-960N. A. Roy, A. Girard, L. P. Bugeat

A Criterion For The Localization Of Structural Modification Sites Using 961-967Modal Data

W. M. To, R. M. Lin, D. J. Ewins

Inverse Weighted Residue Method And Its Application To Model Correction 968-971D.-W. Zhang, L.-C. Zhao

Using Experimental Modal Analysis To A Shell Structural Dynamic Modification 972-978A.-Q. Liu, J. Du, D.-B. Li

SESSION 33. PROCESSING MODAL DATA III

Measurement Of Dynamic Deformation During Operation Using The Principal Component 979-983Analysis On Response Data

N. Okubo, K. Imamura

Improved Modal Parameter Estimation With Variance Weighting 984-987M.-C. Han, A. L. Wicks

Multiple Integral Model For The Time-Domain Modal Parameter Identification 988-991B. Zheng, W. Huang, C. Shao

Graphics: Key To The Usefulness Of Structural Dynamics Technology 992-998C. H. Staker

Removal Of Harmonic Peaks From Frequency Response Functions Of Rotating Systems 999-1004L. T. Charek, G. D. Shteinhauz

SESSION 34. LINKING ANALYSIS AND TEST V

Test Analysis And Correlation For An Advanced Composite Stiffened Cylinder 1005-1011I. U. Ojalvo, T. Ting, D. Pilon, W. Twomey, T. L. C. Chen

Improvement Of A Finite Element Model By Means Of Measured Natural Frequencies 1012-1019F. Steinwender, R. Nordmann

A Comparison Of Some Methods Of Modal Parameter Extraction 1020-1025W. F. Tsang, C. Williams

Power Input Analysis In The Study Of Large Cylindrical Shell's Cutting Noise 1026-1031J. Zhang, C. H. Ku

Practical Applications Of Finite Element Model Tuning Using Experimental 1032-1037Modal Data

E. Dascotte

SESSION 35. DAMPING

Vibration And Damping Analysis Of Board Used For Printed Circuits 1038-1040A. Gupta, J. Crovetto, M. J. Kim

Identification Of Light Damping In Structures 1041-1047J. L. Jensen, R. Brincker, A. Rytter

On The Complex Damping Of MDOF Systems 1048-1055Z. Liang, G. C. Lee

Digital Filter Techniques Vs. FFT Techniqes For Damping Measurements 1056-1064S. Gade, H. Herlufsen

Analysis Of The Damping Of Liquid Sloshing In Cylinderical Tanks 1065-1067L. Bo

Suppression Of Residual Vibrations In Motor-Driven Arm Systems By 1068-1073Dynamic Damper

K.-J. Kim, D.-H. Cho

SESSION 36. EXPERIMENTAL CASE HISTORIES II

Modelling Gear Box Rattling Noise 1074-1079P. Solfrank,

Mechanical Mobility Of Elastomer Isolators Boundary Element Calculation 1080-1086And Measurement

L. Gaul

Improvement Of Final Drive Gear Noise By Structural Modification Of The Gear 1087-1092Housing And Drive Shaft

M. Kondo, M. Ishihama, A. Kinoshita, H. Aoki, A. Kawaguchi

Geometric Stiffness Influence In Linearized Flexible Multibody Systems 1093-11000. Wallrapp

SESSION 37. STRUCTURAL DYNAMICS MODIFICATION IV

The Characteristics Of Frequency Response Function Estimators Using 1101-1107Random Excitation

W. M. To, D. J. Ewins

On The Use Of Modal Analysis For Crack Identification 1108-1115J. M. Montalvao e Silva, A. J. M. Araujo Gomes

Estimation Of Rigid Body Modes And Support Properties 1116-1121Q. Zeng, L. Zhang

Mechanical Structural Dynamics Modification And Sensitivity Analysis 1122-1126M. Zheng, X. Liu

Simultaneous Structural Dynamics Modifications By Viscoelastic Damping 1127-1132X. Wang, C. H. Ku

SESSION 38. ANALYTICAL METHODS V

Elimination Of Rigid Body Modes From Asymmetric Dynamical Systems 1133-1139S. Natsiavas, H. D. Nelson

Restoring Force Method And Response Estimation 1140-1145E. G. Endebrock

The Method Of Finite Element In The Rotor Dynamics 1146-1150J. Gao, X. Zhu

Experimental Modal Analysis To Machine Tool Using Relative Pseudorandom 1151-1157Exciting Method

Z. M. Chen

Effect Of Backlash On Vibration Spectrum In Spur Gear Boxes Incorporating 1158-1164Ball Bearings With Radial Clearance

F. M. A. El-Saeidy

Coupling Effects Of Rigidity And Flexibility In A Chain System 1165-1168X. Ma, C. Shao, W. Huang, Z. Zou

SESSION 39. LINKING ANALYSIS AND TEST VI

Updating Mechanical Joint Properties Based On Experimentally Determined 1169-1175Modal Parameters

S. H. S. Carneiro, J. R. F. Arruda

Direct Update Of A Generalized Model Using Test Data 1176-1179S. J. Guo, N. G. Hemingway, N. D. Cogger

XI

Determination Of Analytical Model Differences Using Modal Updating 1180-1189J. O'Callahan

Experimental Verification Of The Theoretically Estimated Rotational Entries 1190-1194Of Mode Shapes

C. Minas, D. J. Inman

Finite Element Model Updating Using Frequency Response Functions And Component 1195-1201Mode Synthesis

J. M. C. dos Santos, J. R. de F. Arruda

Theoretical And Experimental Study On The Dynamic Characteristics Of Coil End 1202-1205Basket Of Large Generator's Stator

Y. Wang, J. Zhu

A Method Of Identifying Physical Parameters Of Substructures 1206-1208

D. Yu, J. Song, Z. Peng, Y. Xu

SESSION 40. EXCITATION METHODS

Modal Testing Using Modern Sine Excitation 1209-1213D. L. Hunt, H. Void, R. Williams

An Enhanced Sine Dwell Method As Applied To The Galileo Core Structure 1214-1220Modal Survey

K. S. Smith, M. Trubert

Electric Impact Hammer--A Performance Comparison Between The PCB Electric 1221-1225Impact Hammer And Conventional Impact Hammers

D. A. Corelli, R. Zimmerman

Modal Excitation--Force Dropoff At Resonances 1226-1231

E. L. Peterson, W. M. Rusen, T. A. Mouch

SESSION 41. EXPERIMENTAL TECHNIQUES II

Accuracy Requirements For Real Time Animation Techniques 1232-1239B. E. Rediers, G. M. Goetchius

Modal Survey Of An Arched Dam, Filling Up 1240-1245P. Kopff, E. Francois

Use Of Dynamic Strain Measurements For The Modelling Of Structure 1246-1251W. F. Tsang

A Frequency Domain Maximum Likelihood Identification Scheme With Application 1252-1261To Flight Flutter Data Analysis

J. Leuridan, H. Van der Auweraer, J. Schoukens, R. Pintelon

SESSION 42. SYSTEM IDENTIFICATION IV

Identification Of Operational Vibrations In Rail Vehicle Structures 1262-1270A. Schenk, M. Sinapius,

Robust Time-Domain Identification Of Mass Stiffness, And Damping Matrices 1271-1277M. J. Roemer, D. J. Mook

Nonlinear System Identification With Random Excitation Using Discrete 1278-1283Third-Order Volterra Series

S.-W. Nam, S. B. Kim, E. J. Powers

A Method Of System Identification For Nonlinear Vibrating Structures 1284-1290Y. Benhafsi, J. E. T. Penny, M. I. Friswell

On The Use Of Some Instrumental Variable Matrices For Inversion In 1291-1296Modal Analysis

C. F. Cremona, J. A. Brandon

Determination Of Physical Parameters Via Vendermonde Vibration Testing 1297-1303Z. Liang, G. C. Lee

XII

SESSION 43. FINITE ELEMENT ANALYSIS II

A Uniform Approach To The Forumulation Of Non-Consistent Mass Matrices 1304-1313K.-J. Young, L. D. Mitchell

Eigensolutions of Beams Carrying Axially Moving Material Calculated By Use Of 1314-1320Exact Finite Elements

J. H. Sallstrom, B. A. Akesson

Eigensolutions Of Rotating Beam Systems Found By Use Of Exact Finite Elements 1321-1326M. Lundblad

Statistics Of Eigensolutions For Degenerate Systems With Random Properties 1327-1330Z. Zhang, S. Chen

Modal Analysis Of Flexible Manipulators Using Finite Element—Transfer 1331-1337Matrix Method

Y. Xu

Dynamic Characteristics Of One-Way Stiffened Floor Systems By Finite 1338-1343Strip Analysis

B. Folz, A. Filiatrault

SESSION 44. LINKING ANALYSIS AND TEST VII

A Comparison Of Test-Analysis Model Reduction Methods 1344-1351A. Freed, C. C. Flanigan

Spatial Distribution Of The Harmonic Distortion Induced By Large Vibrating 1352-1358Amplitudes Of Fully Clamped Beams and Rectangular Plates

R. Benamar, M. M. K. Bennouna, R. G. White

Element Modification Method Of Analytical Model Updating With Application 1359-1364L. Zhang, L. Yu

A Note On The Effects Of An Iterative Method On Estimating Modal And 1365-1368System Parameters From Response Transfer Functions

D. J. Benson, T. C. Huang

Design Optimization And Test/Analysis Correlation Of The Head Expander Of 1369-1375A Vibration Test Shaker

R. S. Ballinger, D. L. Brown, E. L. Peterson

SESSION 45. ANALYTICAL METHODS VI

Singular Value Decomposition: Sufficient, But Not Necessary 1376-1380J. A. Brandon, C. F. Cremona

A New Nonlinear Modal Parameters Identification Method 1381-1385X. Ma, J. Yuan, P. Liu

Dynamic Analysis Of Machine Tool Column Via Modal Test and FEM 1386-1389D. Yu, X. Yu, Z. Peng, Y. Xu

The Analysis Of Stochastic Response Of Piecewise Linear System Under 1390-1396A Combined Deterministic And Random Excitation

Q. Feng

SESSION 46. SYSTEM IDENTIFICATION V

Eigenvector Derivatives For Analytical Model Improvement 1397-1402M. F. Orr, Jr.

Error Analysis Of Linear And Nonlinear System Identification 1403-1409C. D. Kan, H. M. Chen, J. S. C. Yang

Modelling Of Modal Interference For A System With Closely Spaced Modes 1410-1416T. K. Caughey, A. F. Vakakis, A. N. Moser

XIII

Reduced Order Self-Tuning Regulator And Corresponding Problems 1417-1423Y. Wu, W. Wu

A Stochastic Suboptimum Maximum Likelihood Approach To Structural 1424-1433Dynamics Identification

J. E. Lee, S. D. Fassois

Estimation Of Joint Structural Parameters From Measured And Computed 1434-1439Frequency Responses

C.-W. Lee, S.-W. Hong

SESSION 47. DESIGN METHODS

Design And Modal Analysis Of A Prototype Link For A Flexible Robotic 1440-1446Manipulator

M. D. Whalen, H. J. Sommer III

A Method Of Design Of Viscoelastically Damped Structure 1447-1455X. Wang, C. H. Ku

Iterative Curve Fitting Method To Extract A Constrained Optimum Design 1456-1461Parameter From The Best Possible Performance Result

Y.-S. Park, S.S. Lee

Design Sensitivity Analysis For Vibration Reduction Of Machine Structure 1462-1468J. Zhu, Y. Cheng Yaodong, J. Qi

Vibration Reduction Design Methods--Tuned Dynamic Absorber For High-Speed 1469-1475Press Machines

Y. Hashimoto, T. Hiromatsu, H. Kushida

Orthogonal Grid Method For Optimization Of Structural Modal Frequencies 1476-1478J. Hou, Z. Feng

XIV