ANNOUNCING

9th

International

Modal Analysis Conference Sponsored by

UNION COLLEGE AND SOCIETY FOR EXPERIMENTAL MECHANICS, INC.

In Cooperation With: Universita degli Stadi di Firenze and Politecnico di Torino To be held at the FIRENZE INCONTRA, CENTRO AFFARI FIRENZE (FLORENCE), ITALY APRIL 15-18,1991 In keeping with the true international structure of the modal analysis community, the Ninth International Modal Analysis Conference (IMAC) will convene in Florence, Italy. Engineers and scientists from 31 countries will present papers at this Conference attesting to the world’s acceptance of IMAC as the prestigious forum for the exchange of this knowledge. The Italian hosts and European community will sponsor a technology information center in the IMAC exhibit area. The technology center concept has been a most popular addition to the exhibit in recent years. On the succeeding pages is the preliminary technical program. Please note that this program is subject to change. This year’s technical program will feature a wide range of topics from basic tutorials to advanced analytical concepts. SEM and the IMAC staff extend a cordial invitation to the modal analysis community to attend the first IMAC to be held in Italy. For further details, including housing and travel information, call or FAX SEM at (203) 790-6373; FAX (203) 790-4472.

12 NavemberlDecember 1880

TECHNICAL PROGRAM MONDAY MORNING, APRIL 15

Eigensolution Reanalysis Using a Modal Reduction Procedure P.J. Conti

1. Experimental Techniques I

Comparison of Component Modal Synthesis Methods C.D. Tsai. S.1. Chen. M.S. J u and Y.G. Tsuei

Italsat Satellite Structure Sine Vibration Test Correlation With Math Model Predictions E Morganti

3. Structural Dynamics Modification I

Testing of Offshore Platforms: Experimental and Numerical Modal Analysis P.M. Quijada and M.E. Martinez Monitoring the Condition of Bridge Structures Using Vibration Data M.G. Wood, M. Bailey, M.1. Friswell, J.E.T. Penny and J.A. Purkiss Experimental Modal Analysis and Disc Drive Design: An Interactive Case History J. Castagna Modal Analysis in the Certification of a Commercial Aircraft W.R. Buckley, G. Green and J. Poland Modal Analysis of an Aluminum Baseball Bat K.K. Steuens

2. Analytical Methods I Combined Experimental/Analytical Component Mode Synthesis (Part 1) and Combined Experimental/Analytical Component Mode Synthesis (Part 2) X. Keqin, H.Zushun and L. Zhenhuang Optimization Techniques in Identifying Parameters of Nonlinear Systems in the Frequency Domain T.Jiashi Nonlinear Modes of a Beam P.H. McDonald The Dynamic Response of Elastic Cantilevers Subjected to Follower Forces A Theoretical and Experimental Study of the Influence of Eccentricity and Initial Curvature G.M. Arijand 0. Pettersson

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I

Structural Damage Configurations Subject to Modal Oscillations Y.-M. LU

Minimum Weight Structure Subjected to Both Natural Frequency and Frequency Response Constraints T.-Y Chen Modal Energy Gradient Method for Updating Design Parameters Using Parameters Using Complete Modal Space D.-W. Zhang and F.S. Wei Theoretical and Experimental Data on Crack Depth Effects in the Dynamic Behavior of Free-free Beams A.J.M.A. Gomesand J.M.M.E. Silua Prediction of Structural Dynamic Modification Via Pertubationiteration Method S.Jianjin Predicting the New Frequency Response Function of a Structure When Adding Constraints A. Sestieri Application of the VA Model Updating Technique for Dynamic Structural Optimization S.Lammens, W. Heylen and K.U. Leuven

4. Linking Analysis and Test I Solution of the Model Correction Problem Via Inverse Methods D.J. Inman and L Starek General Accurate Analytical Type Solutions for the Free Vibration of Rectangular Plates Resting on Classical Edge Supports Utilizing the Superposition Method: Experimental Verification R.K. Singal, D.J. Gorman and S.A. Forguee Estimation of Load Inertia Parameters in Parallel Drive Mechanism S.J.Lee, Y-K. Ha, K.J. Kim, T.S. Oh and Y-P. Park

Chwalla’s Bifurcation Problem Revisited 1.C. Chang

Parametric Correction of Finite Element Models By Minimization of a n Output Residual J. Piranda and G. Lallement

Considerations to Optimize the Dynamic Behavior of Boring Bars F. Kuster

Optimal Selection of the Measured Degrees of Freedom and Application to a Method of Parametric Correction G. Lallement and S.Cogan

Experimental Tecbniquam 19

Identifying the Free-free System Characteristics From Multiple Constraint Boundary Tests P. Barney

An Evaluation of Some Uses of Mass Orthogonality M.K. Abdelhamid

A Method for Error Localization in FE-models C.P. Frftaen

B.P. Jarufs

5. Processing Modal Data I

Frequency Response Synthesis Using Assumed Component Modes P.J. Conti and M.G.Donley

Determination of Undamped Normal Modes From Measured Real Forced Modes Using Frequency Response Data M. Rades

Study of Modal Vector Correlation Using Various Techniques for Model Reduction P. Auftablle

Optimal Uniform Subwindow Partitioning for FFT-based Timefrequency Spectrum Estimation P. Shennan

Influence of the Furniture Elements on the Modal Properties of a Double Deck Railcar Study of a Strategy of Modelization B. Darguet

Investigation on CAT System With Stable Sinusoidal Sweep Frequency and Modal Analysis Technique X. Yanehen

Localization of Modeling Error and Updating of Structural Parameters by Sensitivity Analysis L Zhang

Consideration on Graphical Representation of the Modal Shape and Vibration Distribution of a Complex Structure T.G. Cioara

A Technique to Update Finite Element Models Using Frequency Response Data W.J. Vfmer

Estimation of Covarianse Functions by the Random Dec Technique R. Brfncker

8. System Identification I

A Comparison of Scalar and Vector Autoregressive Models for Modal Analysis S.M.Pandit and J.N.Tolia

An Experimental Study of a Number of SDOF Systems Using the Restoring Force Surface Method K. Worden and G.R. Tomlinson

6. Modal Test Methods I

SlSO and MlMO Time Domain Methods for Vibrational Structures S. Braun

Enhancements to Modal Testing Using Finite Elements

An Efficient Procedure for Harmonic Testing of Structures S.Alampalli Void Detection in Concrete Pavements Using Modal Procedures G.R.Tomlfnson and R. Chng An Investigation Into the Use of Statistical Process Control for Determining Modal Test Linearity M. Good Use of Modal Testing in the Nonlinear Dynamic Analysis of Vehicle Systems A.A. Shabana

O n Modal Testing of Structures With Rubber Links J.C. Van der Walt and P.S. Heyne Modal Parameter Identification of a Spacecraft Launcher Payload Fairing Half Shell J.E. Cooper On Regularization Methods Applied to Error Localization of Mathematical Models H.G. Natke Input Output Identification and Control of Structures

J. Rodellar. A. Reinhorn and T.T. Soong Remote Detection and Location of Structural Faults M.H. Richardson Determining A Modal Sensitivity Function for Locating Structural Faults M.H. Richardson

MONDAY AFTERRJOON,APRIL 15 7. Linking Analysis and Test I1 Observations on Some Model Optimization Methods M.K. Abdelhamfd and M.S. Hemami

14 Navember/December 1990

ldentification of Modal Parameters Via Global F.R.F. With Curve Fitting Order-by-Order S. Jfanwef Accurate Determination of the Inertia Properties of a Nearly Axisymmetric Rigid Body R. Rodeman

9. Modeling Structures I The Modal Analysis of Motion Response, Dynamic Stress and Acoustic Radiation T.Jffang

Application of CAE to Vibration and Strain Analysis of a Bicycle N . Okubo and N. bhlda

Development of a Standard Test-bed Box for Structural Noise Evaluation in a Closed Field M. Gllardl, G. Ottonello and G. Toniato

Modeling and Control Design of a Wind Tunnel Model Support D.A. Howe

Comparison Between Experimental and Numerical Structural Noise Evaluation Inside a Test-bed Box A. Preue

Parametric Signal and System Modeling From Short Duration flutter Test Data H. Van der Auweraer Consistent Modeling of Continuous Structural Dynamic Modifications W. D'Ambrogio Structural Integrity Monitoring Through Dynamic Measurements and Changes in the Flexibility of Beam Element Due to Cracking A. Rytter Local Element Method for Structure Dynamics Modification K. Jian

Minimization of Radiated Sound Power From Structures Using Shape Optimization J.S. Lamancusa A Method for Modal Analysis of Constrained Structures Q. Jhg-Lei A Study on the Interior Noise-Reduction of a Passenger Car J.M. Lee

12. Special Modal Session (developed by Professor B. Piombo)

10. Substructuring I

A Boundary Element Approach to an Acoustic Radiation Problem Based on Calculated and Measured Vibrational Data G. Ruspa. G. Schelllno. E. Mantouanl and M. Hamdl

Algorithm of Repetitive Substructures for Thick Shell and Transition Finite Elements J. Szwedowicz and J.A. Kublak

Identification of Robot Link Interface Using Least Square Modal Assurance Criteria M.M. Gola. A. Soma, P. Rissone and N. Carjagni

Influence of Component Nonlinearities on Robot Vibration Analysis A. Romlti and C. Ferraresi

Repeatability of the Non-linear Characterization of a n Automotive Shock Absorber A. Audenlno and G. Bellngardl

An Improved Numerical Procedure for the Coupling of Structural Components Using Measured and Computed Response Spectra T.C. Lim and G. Steyer

Optimization of fluid and Structure FEM Models for the Dynamic Analysis of a Test-bed Box M. Costa. F. Cum, G. Curti and G. Ottonello

Derivation of a Controls Design Model From Test Data Using MPlus and ERA J.P. Lauffer and J. Allen Use of Modal Synthesis Techniques for the Design of Vibration Isolators Taking Into Account the Elastic Foundation Behavior L Li

A Lubricated Bearing Element for FEM Rotor Dynamics G. Genta and F. Vatta Influence of Component Nonlinearities on Robot Vibration Analysis A. Rornlti and C. Ferraresl Some Contributions to Composite Panel Flutter Research C. Surace and G. Surace

Prediction of the Dynamics of Structural Assemblies Using Measured FRF Data: Some Improved Data Enhancement Techniques D. Otte

TUESDAY MORNING, APRIL 16

11. Noise/Acoustics I

13. System Identification I1

Numerical and Experimental Acoustic Results of a Fuselage Full Scale Test A. Poonessa

Impulse Response Identification of SDOF Systems From Timetruncated Signals A. Agnenl,..I Balls-Crerna and A. Poolozzl

Practical Treatment of Elasto-acoustic Problems Using A Mixed Modal Finite Element/Boundary Element J.P. Coyette

A Multi-reference Modal Parameter Identification Technique Based on a Weighted Least Squares Principle T. Yoshlmura

Gear Box Rattling Noise Based on Modal Data

Observations on Some Model Optimization Methods M.K. Abdelhamid and M.S. Hemami

P. Solfrank

Experimental Ibehnigues 15

Structural Damping Measurement Using FFT-based Frequency Response Analyzer T. Yamaguchf

A Comparison of SDOF and Global MDOF Modal Analysis Techniques When Applied to a Lightly-damped Linear Structure M. lmregun

Variance and Bias Estimates for Time Domain Modal Identification Methods LD. Peterson

Expansion of Frequency Response Data for Model Updating W.J. Vfsser

Parameter Estimation of Structural Dynamic Models J.J. Allen

Estimation of Damping Matrix for Analytical Model From Experimental Results J.J.C. We1

Q-Markov Cover Identification Frequency Domain Windowing and Their Application on Hubble Telescope Data Modeling K Lfu

A Procedure for the Integrated Development of Test-analysis Models P. Sergent, S. Crowley and M. Capablanco

Dynamic Load Identification in Time Domain R. Wu

16. Experimental Techniques I1

14. Finite Element Analysis I

Optoelectronic Measurement and Calculation of Surface Wave Propagation on Irregular Soil Domains L. Gaul and M. Plenge

Vibration of Delaminated Anisotropic Plates LH. Teneketzfs, EG. Henneke and M. Gunzburger The Impedance Matrix for the Finite Dynamic Element of Triangular Bending Plate C. Jfng-Yu

A Theoretical Basis for Cross-axis Corrections in Tri-Axial Accelerometers K.G. McConnell and S.B. Han

Identification of Structural Boundary Condition D. Xiao-Qfng, C. Yao-Dong and Q. Jlng

An Experimental Technique for Determining Complex Structural Frequency Response Functions in High Ambient Temperature Y.Heji

Natural Frequencies for Plane Frames Partially Embedded in Elastic Foundations A.LM.AIJanabf, B.J.M. FaridandF.A. AI-Shawf

Experimental Research of Ultra-small Body’s Dynamic Characteristics P.Q. Zhang. Q.M. Wang, X.O. Tang and T.C. Huang

Gearbox Dynamics for Low Noise G. Steyer and T.C. Llm

Using Numerical and Experimental Modal Analysis in Building Conservation: The Case of the Medieval Belltower of the Church of Badia Fiorentina in Florence, Italy M. Carfagnf and S. Carfagnf

Optimization of Structures to Reduce the Transmission of Vibrations: An Approach Based on Kuhn-Tucker Optimality Condition With Constraints on Modal Effective Parameters P. LeMerle. L. Jezequel and H. Gmngfer Modal Description and Sensitivity Analysis in the Determination of Thermal Parameters in Microelectronic Structures M. Wledemann

Generation of Signals for Structure Excitation with Given Spectrum of Frequency P. Toni and V.D. Campedellf An Attempt to Quantify the Errors in the Experimental Modal Analysis Process K. Marudachalam and A.L. Wicks

Transient Vibration of Compressible Fluids in Piping Systems Including Non-proportional Damping and Mean Flow Using Complex Modal Analysis A. Frid

17. Modal Techniques for Rotating Machinery I1

15. Linking Analysis and Test 111

The Use of Neural Nets in Signature Analysis-rotor Imbalance W.J. Stevenson

Utilizing the Kinetic Calculation as an Aid to Instrumentation Location in Modal Testing G.R. h r k e r and T.L Rose

Dynamic Analysis of Pivoted-pad Journal Gas Bearing and Rotor System A. Sakuraf. Y.Inoue, T. Hlrata and F. Kanou

Evaluation of Model Verification Methods in Structural Dynamics M.F. Schmldt

An Improved Branch Method for Gear-coupled System J. Kuang

Modal Analysis of a Pre-cast Concrete Floor Element P. Eriksson

16 November/Deeember 1900

Design and Test of an Electromagnetic Eddy Current Damper for a High-speed Rotor J.R. Frederick and M.S. Darlow

Dynamical Behavior Analysis of Rotor/Structure Systems By Modal Truncation Method F. Cheli, K.L. Caualca. F.G. Dedini and A. Vania

On the Fundamental Frequency of Symmetric Rectangular Laminated Plates: A New Closed-form Solution R. Reis, 0. Barton, B. Qian and L. Thigpen

18. Instrumentation and Transducers

20. Structural Dynamics Modification I1

Absolute Force Gage Calibration Using Step Excitation G.P.Carroll

Treatment of Damping Add on Initially Undamped Structures Using a Modal Reanalysis Procedure P. Level

Effects of Scaling on the Implementation of Digital Filters and Controllers J.J. Allen Low Frequency Calibration With Structural Gravimetric Technique J. Lin Application of a Three Degree of Freedom Laser Vibrometer for Experimental Modal Analysis J.A. Cafe0 A New Pipelined Software Design Speeds Up MIMO Measurements on Multi-processor Based Data Acquisition Systems S. Wilkie Experimental Investigation of Piezoelectric Film Used as Modal Sensors A. Sumali and H.H. Cudney

TUESDAY AFTERNOON, APRIL 16

Improvement of the Numerical Conditioning of a Structural Modification Procedure S. Cogan and G. Lollement A Model of a n L-Section Beam Containing Damage for Use in Finite Element and Structural Dynamics Modification Applications W.T. Springer Continuous Perturbation Method for Structural Dynamics Modification L Kuinian On the Application of Perturbation Theory in Modal Analysis: Truncational Effect and Repeated Eigenfrequencies W.Wang Modal Analysis on the Model of the Satellite Italsat I. Peroni. A. Paolozzi and A. Bramante

21. Non-Linear Modal Analysis

19. Analytical Methods I1

An Adaptive Autoparametric Vibration Absorber M.P. Cartmell

Solutions to Superharmonic Oscillations J.J. Wu

Polyreference Method of Modal Analysis Using Impact Test T. Vinh and I. Tawjlk

Complex Modal Analysis of Nonstationary Random Response

T.Fang, T. Zhang and 2.Wang

Experimental Analysis of a Non-linear Two Degree of Freedom System Q.H. Yu,H.J. Rice and J.A. Fitzpatrick

Eigen-matrix for the Dynamic Behavior of Linear Engineering Structures X. Ma, G.C. Lee and 2.Liang

Engineering Applications of Volterra Series A Pilot Study M. Wright

Forced Vibration of Thick Cylindrical Shell H.-Y. Ni

An Explanation of the Cause of the Distortion in the FRF of a Duffing Oscillator Subject to Harmonic Excitation D.M. Storer and G.R.Tomlinson

Identification for Main Harmonic Component by Hilbert Transforms H. Dfshan and T. Zhongfang

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Study on Vibration Source Characteristics General I/Q Model Representation and Its Fundamental Properties Y Hashimoto Modal Theory of Linear Incompletely Uncoupled Vibration System Q.J. Yang, C.Q. LI and T.C. Huang Determination of Material Constants for a Cardboard With Sandwich Corrugated Core by Modal Testing and Analytical Method I.C. Wang, J.C. Wei and W.J. Lin

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Aeroelastic System Identification of Advanced Technology Aircraft Through Higher Order Signal Processing R.O. Stearman E.J. Powers and R. Yurkouich Substantial Effects of Nonlinear Modal Coupling in Structural Vibration Testing J.W. Roberts and M.J. Atherton Higher Order Frequency Response Functions and Their Relation to Practical Structures G.R. Tomlinson and D.M.Storer Multidimensional Frequency Hilbert Transform to Validate Higher Order Transfer Function T. Vinh and T. Chouychai

Experimental 'Ibohniquea 17

22. Processing Modal Data I1 A Study on the Separation of Vibrational Modes J.R. Houghton and P. Shen An Iterative Approach to an Optimal Reduced Mass Matrix M.A. Blofr Instantaneous Time-Varying AR Spectral Analysis for Cyclostationary Random Processes P. Sherman Improved FRF Estimation by the Data Dependent Systems Methodology S.M. Pondft and Y. Yo0 Extraction of Structural Angular Velocities Using a Laser Velocimeter K. Kochersberger and A.L Wicks An Alternative Time-domain System Identification Algorithm C.M. Archibald and A.L Wicks

23. Modal Test Methods I1 The Application of ITD Modal Test Method to the Analysis of Dynamic Characteristics of Road Vehicle Structures 2.-A. Shoo, T.-Y.Jfang and W.-F. Zhang Electromechanical Simulation of Actively Controlled Vibratory Systems A.B. Polazzolo and R.R. Lfn Dynamic Response of Structural Elements Excited Acoustically

H.-T. Lee Use of Principal Force Vectors With the Multivariate Mode Indicator Function M. Nosh Determination of Real Normal Modes Via an Optimized Superposition of Broad-band Frequency Response Functions K. Muhlbauer, S. Dfllinger and G. Bothe Determination of In-flight Modal Characteristics of a Fighter Aircraft M. Marshall

24. System Identification I11

Dynamic Characteristics of Liquid-filled Tanks by Modal Analysis Technlques S.A. Mourad and M.A. Haroun System Identification in the Presence of Harmonic Signals P. Sherman Recursive Identification of Nonlinear Systems by Means of the Extended Kaiman Filter S. Sefbold and C.P.Frftzen Comparison of Identification by ARMA Models and the Random Dec Technique J.L. Jensen Variation in the Modal Parameters of Steel Plates Due to Changes in Mass, Stiffness. and Damping M.R. Chowdhury

WEDNESDAY MORNING, APRIL 17 25. Space Structures Vibration Control of Large Space Structures by the Variable Structure System Method L WangandL. Lfu Active Vibration Control of a Beam: Experiment and Theory J.-Y. Kfng, R.C. Lfn and K.C. Chfao Study in the Structural Dynamics of a Tilt Prop-roto/Wing System N. Khoder and R. Abu Malluh Vlbration Induced Motion of a Neutral Particle Beam Operating in Space T.A. Butler Atlas II Payload Fairing Modal Test and Correlation R. Brlllhart. D. Hunt and W. Dreyer Qualification of Large Spacecraft Using Modal Test Techniques C.R.Voorhees Modal Survey of the Brazilian Launch Vehicle S.H.S. Carnefroand J.R.F. A m d a

A Time-Domain Method for Identification Based on Fourier Series V. Steffen. Jr. and D.A. Rade

26. Analytical Methods I11

The Use of Impulse Response Function for Modal Parameter Estimation S. Gade and H. Herlujsen

Analytical Formulation of Fluid Structure Interaction With F.E.M. Method Taking Into Account Different Coupling Approaches A. Pldello

Methods and Application of Spatial Parameter Estimation From Measured Vibration Data J.E. Mottershead Modal Analysis and System Identification of Coupled Electronic Packaging Systems K.K. Stevens

18 November/December 1880

Broadband Response of Beam Trusses by Frequency Smoothing and Structural Path Analysis A. Gfrard Modal Effective Mass Models in Structural Dynamics A. Gfrord

A Direct Energy Approach for Updating Dynamic Finite Element Models N.A. Roy

On Dynamics Modification of Structures by means of Eigenstructures Assignment Method J. Qu

Klnetoelastodynamics of Cam-linkage-Follower Systems C. Bagcl

Natural Frequencies of Vertical Process Vessels Using the Personal Computer A.E. Blach

Determining Structural Dynamic-damping Factors in Moving Mechanical System C. Bagcl

ADYS-analyze Dynamics of Structures Software S. Mllacek

Techniques for Forced Response Involving Discrete Nonlinearities P. Aultablle Forced Nonlinear Response for Linear Modal Models Using a State Space Structural Dynamic Modification Process P.Aultablle

27. Rotating Machinery Modal Analysis Techniques and Dynamic Characteristics of Rotor Bearing System R. Jln-Quan and X. You-Bal

29. System Identification IV Localization of Model Error With Structural Connectivity Constrait J.C. O’Callahan and C.-H. Wu A Spectral Method for Identifying Nonlinear Systems R. Shyu Optimal Design of Measurement Programs for the Parameter Identification of Dynamic Systems P.H. Kirkegaard

A Sgt of C Finite Elements for Rotor Dynamics Analysis T.C. Gmuer and J.F. Rodrigues

Test-Analysis Correlation of a Three-stage Missile Using Design Sensitivities E L Marek

Finite Element Modeling Associated to Laser Holography in Turbomachinery Blading Modal Analysis E. Benuenuti and M.Plniautl

The Extended Complex Mode Indication Function in Modal Force Technique A.C.Y. Lin and Y.G.Twei

Assessing an Approach to Fluid Power Components Dynamic Analysis G. Mlccoll, S. Negrfnl and R. Paolussl

Spatial Modal Analysis K. Kochersberger and LD. Mltchell

Investigation of an Arrayed Sensor to Characterize Bearing Defect Forcing Functions S.M. Dumbacher

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Digital Resampling A Viable Alternative for Order Domain Measurements in Rotating Machinery D. McDonald The Dynamic Characteristics of a Mass-spring Propeller Model S. Sarkanl and G. Ssllagyl

Two Approaches to Improve the Identification Accuracy of Complex Modal Parameters T.P u - h n and S. Zhang-Llng Impulse Response Identification of SDOF Systems From TimeTruncated Signals A. Agneni and L Balis-Crema

30. Damping

28. Design Methods

Feasibility of Introducing Active Elements in Structures to Increase Effective Damping G. Desanghere and E. Vansevenant

Active Control of Structural Vibration Via Considering Acceleration Index J. Jiang and Y Ye

Response of a Circular Plate With Patch Damping M. Mezache and D. Muster

A Field Modal Parameter Identification Technique of Rotor or Rotor System 2. Gangtle. H. Wenhu and W. Chengxun

Modal Analysis and Five Series Model of Synthetic Damped System L Zhong

A Method of Multi-object Optimization Designs for Vibration System Parameters T.Jlashl

A New Technique for the Determination of Dynamic Shear Moduli and Shear Specific Damping Capacities of Fiber-reinforced Composites Through Flexual Vibration Measurements L Dash1

Optimum Control Design of a Non-linear Dynamic Absorber Applying to Structural Vibration Induced by Wing S.R. Ying

Optimal Dynamic Absorber for Transients Application to the Motion of a Robot Arm D.A. Johnson

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On Adaptive Damping of Robotic Manipulators With Uncertain Dynamic Models Y.Stepanenko Vibration Isolation Analysis of Two-stage Nonlinear Vibration Isolation System to Random Excitation S.-2. Chen and G.S. Cheng

WEDNESDAY AFTERNOON, APRIL 17 31. Experimental Techniques 111 Predicting Most of the Elasto-mechanical Parameters by the Use of Electronic Test Equipment in Ground Resonance Tests With Application to Airframe Vehicles S.F. Glrgls and A. Glad1 Stepped Multi-sine Modal Testing in Practice M.I. Frlswell and J.E.T. Penny

33. Vehicular Exact Complex Eigensolutions Used for Beam Structures on Elastic Foundation Subjected to Moving Loads J.C.O. Nlelsen Reduced Order Linear Models of a Hydro-mechanical Mount R. Slngh Structural Analysis and Tests of Truck Transported Nuclear Waste Shipping Containers K. W. Gwlnn Chatter in Railway Transmissions G.G. Llalnl. P. Ton1 and V. Brandanl Modeling and Study of Ride Quality of A Land Cruiser M. Bahraml and A. Nakhal Applications of Modal Analysis to Motor Cars F. Casula, V. Manea and F. Zampedrl

Dam-foundation Interaction Study of a Concrete Arch Dam Z,H. Duron and J.F. Hall Experimental Modal Analysis in Offshore Platforms M.E. Martlnea and P. Quljada Measurement and Importance of Rotational DOF M. Lally and D. Brown Dynamic Analysis and Structural Modification of Engine Block Y. Qlngfo

The Utilization of Magnetic Tape Recording for Modal Data Acquisition J.C. Morehead

34. Modal Excitation Methods

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M.P.S.T. Multi-point Structural Testing B.S. Gabrl, R. Wallace and J. Matthews Overview of Excitation Methods for Modal Measurements N. Olren Modal Testing Using Multiple Input Random Excitation D. Hunt and R. Brlllhart Modal Testing Using Multi-phased Step Sine Excitation

J. Matthews and R. Williams

32. Structural Dynamics Modification 111 FRF Method of Structure Dynamic Modification and Software X. Zhang and J. Zhang

35. Modal Test Methods I1

An Efficient Technique for Optimal Design Changes to FEM of Structural Dynamic Systems G.A. Plerce and S. Jonas

Low Cost Real-time Special Resolver for Modal Applications J.T. Gajjar

Modal Modification of Dynamic Mechanical Structure Using Dynamic Stiffness and Transfer Matrix Concept R.K. Srlvastava and T.K. Kundra Dynamics of Multiple Span Pipes Conveying Fluid and Instability of Multi-span Pipe Conveying Unsteady Flow and Resting On Elastic Supports A.N. Raafat, A.A. Helmy and U.A. Abdelsalam

Driven-base Modal Parameter Estimation for Continuous Structures J. Lee Uncertainty in the Estimation of Modal Parameters of a Structure N. Phone and C. Santollnl Comparison of Multi-point Vibration Test Methods

K. Alexlou and J.R. Wright A Procedure of Structural Dynamics Modification Using Frequency Response Function Formulation Q. Zeng Optimizing the Fatigue Lifetime of Structural Components by Using Dynamic Analysis Methods D. Llefooghe, W. V a n B ~ sand ~ l P. Sas

20 NovemberDecembr 1880

Estimation of Clearances and Impact Forces of Mechanical Systems Using Vibroimpact Response S. Lin and C. Bapat Multiple Input/Output Frequency Response Function Estimation C.M. Archlbald and A.L Wicks

36. Linking Analysis and Test IV Active Vibration Control of a Flexible Manipulator in Parallel Drive Mechanism Y-P. Park, X-K. Han, S.-C. Chol, J.-W. Kim andS.-J. Lee Comparison of Use of Natural Frequency Data and Mode Shape Data for the Location of Defects in Structures C.H.J. Fox Comparison of Procedures for Localizing and Correcting Errors in Computational Models Using Test Data M. Link Finite Element Modeling Improvement of an Analytical Model Using Test Data

S.Guo Model Correlation and Orthogonality Criteria Based on Reciprocal Modal Vectors J.J.C. We1 Expanding Test Mode Shapes for Better Visualization

S. Crowley The Modal Parameters Identification and Noise Control of Oil Pan Z. Zhonghua and J. Wefmfng A Second Order Interaction Procedure for Correlation of Analysis Frequencies with Test Data I.U. Ojaluo and D. Pflon

37. Analytical Methods IV A New Approach Frequency Response Function Estimation S. Gu and F. Huang

APRIL 18 38. Standardizational Modal Analysis Standardization and Modal Analysis D. Muster

39. Analytical Methods V Dynamic Analysis of Viscoelastic Structures A. Chen and D. Zhu Power Flow and Energy Distribution Between Non-conservatively Coupled Plates and Power Flow and Energy Distribution Between Coupled Plates Under Correlative Excitations J. Zhang and C.H. Ku

The Modal Strain, RDOFs and the Graphics Method of Modal Parameter Sensitivity Analysis T.Jrfong and H. Shilfn The Transfer Matrix Method for Dynamic Analysis of Onedimensional Lattice Structures Y.RenandW.Zhu Generalized Definition of Shear Parameter for a Damped Beam With N Elastic Layers L. Jfan and C.-Z. Zhong A Method for Modal Analysis of Constrained Structures J.-L. QU Impact Response Analysis of Multi-body Systems Z. Shfjln

Modes and Quasi-modes in Modai Analysis D. Afolabf

Force Reconstruction Using the Inverse of the Mode-shape MaMx T.G.Came and V.1. Batemen

Resolution of Double Modes D. Afolabf

40. Linking Analysis and Test V

Correlation of Finite Element Models Using Mode Shape Design Sensitivity C. Flanfgan

A New Method to Correct the Design Value of Gear Stiffness X. Yon& and C. Zhongyi

Comparison of Driving Point and Transmissibility Frequency Response Functions S. R e t n k o Comparison of Two Approaches t o Incorporate Geometric Stiffness Terms in Flexible Multibody Dynamics 0.Wallrapp and W. Rulka Multi-modal Approach for Free Large Vibrations of Buckled Plates R. Heuer, H. Irschik and F. Zfegler

Revising MSC/Nastran Models to Match Test Data K. Blakely Updating of Force Functions D. Eddy Practical Application of FEM Model Correlation and Updating Techniques on a n Aircraft Using Test Data of a Ground Vibration Survey M. Brughmans

Receptance Functions Prediction for Rotating Elastic Bodies Y.F. Chou and K.F. Huang

Factors Contributing to the Nonlinear Acoustic Response in Fluid Structural Interactions R.O. Steannan

Lanczos Algorithm for Eigenvalue Problem Analysis of Flexible Multibody System W. Bin, L Youfang and H. Jfanyao

Difference Between Left-hand and Right-hand Natural Modes in Industrial Rotating Machines R. Bigret. S. Vfalard,R. Cheualier and J. Bedfou

Experimental lbchniquen Zl

Modal Correlation of Test and Finite Element Results Using Cross Orthogonality With a Reduced Mass Matrix Obtained By Modal Reduction and Nastran’s Generalized Dynamic Reduction Solution Routine R.G. Budynas and D. Krebs Determination of Critical Buckling Load of Thin-walled Cylinders Using Modal Analysis A.C. Costley. S. Mourad, G.C. Fbrdoen and R.J. Kazanjy

41. Modal Fundamentals A Fundamental Theorem of Complex Damping M. Tong and Z. Llang

42. Experimental Techniques IV Ground Vibration Test On Piaggio P-180 Aircraft Comparison Between Two Modal Test Methods C. Surace and P. Chlarlone ARMAV Model Technique for Multiple Input/Output System Identification G. D’Aleesandro, E. Glorcelli and L Garlbaldl Sensitivity knalysis for Partial Viscoelastc Layer Distribution A. Soma and L Garlbaldl A Method for Evaluating Loss Factor of Damping Layers LG. Llang, L Mlna and L. Garlbaldi

On the Performance of Various Kinds of Rod and Beam Mass Matrices on a Plane Frame Structure KJ. Young and LD. Mitchell Nonlinearity Identification and Quantification Using Inverse Fourier Transform Y.Pork Identification of Nonlinearities: Application of the VolterraModel to Discrete MDOFs Systems; Possibilities and Limits A. Frachebourg Modal Test Strategies for Moderately Nonlinear Structures J. Dee1 and J. Komrower

THURSDAY AFTERNOON, APRIL 18 44. Finite Element Analysis IV Solid-Shell Transition Finite Elements for Structural Dynamics Analysis A. Schorderet and T.C. Gmuer A Method of H-P Version Mesh Optimization for Structural Dynamic Analysis by FEM J. Nlu. J. QI and Y. Chen

Global MDOF Curve Fitting With Separated Global Parameter Method Using Frequency Response Functions LG. Llang and L Garibaldl

Analysis and Improvement of Static and Dynamic Characteristics of Mechanical Structure

Singular Value Decomposition Applications and Limitations Y.Mebrahtu and L Garlbaldl

Design Optimization of Modal Behavior of Railway Pantograph for High Speed Running G. Glanfranco, P. Toni and a Brandanl

Experimental Analysis of a Coupled Structural-acoustic Vibration in a Cylinder with A Flexible Plate F.M. Cura. G. Curti and M. Mantovanl Reduction and Modal Truncation: Test Cases D. Francesconl and G. Tonlato

L Damlng

Practical Application of CAE to Design a New Comfortable Scooter

c. pbll

43. Finite Element Analysis 111

Simulating the Presence of Damage in a Vibrating Structure With Finite Element and Structural Modification Techniques W.7.Sprlnger

Tuning of Large-scale Finite Element Models E. Dascotte

Test Ship Structure Subjected to Underwater No-contact Explosion G. Guzzo. E. Ghlnettl, L Rastello. G. Guldl and R. Alba

Structural Optimization Using Predicted Complex Response A. Potel

Assessing an Approach to Fluid Power Components Dynamic Analysis R. Paoluzzl. G. Mlccoll and S. Negrlnl

Implementation of a Modal Filter on a Five Meter Truss Structure S.J.Shelley

45. Siesmic Topics

Stability Analysis and Damped Critical Speeds Research in Rotating Machines by Finite Element Analysis U.Barberls

Comparative Study of the Dynamic Response of Solid and Sliced Rigid Bodies G.C. Manos and M. Demosthenous

Finite Element Meshing Tool for the Dynamic Analysis of Beamlike Structures M. DeSmet. H. VanBrussel and P. h.9

Dynamic Response of a Liquid Storage Tank Model With Influences From Support Non-linearities G.C. Manos

22 NovemberlDecember 19BO

Study of the Dynamic Characteristics of Model Frame Structures Utilizing an Earthquake Simulator Facility G.C. Manos, D. Mpouftdls and M. Demosthenous

Viscoelastically Passive Damping Analysis and Design Using ASKA X. Coo and H.-P. Mlejnek

Frequency Response of Some Seismic Events; Modal Response to the Vertical Component of Seismic Ground Motion P.R. Mlllarke and D.J. DeMlchele

An Effective Solution Method for Local Modificationsof Damped Linear Systems and Effective Software VSDM for Predicting Dynamic Characteristics of Structures Modified by Viscoelastic Damping S. Zhljlan, W. Xlaogang and X. Xla

Effect of Impulse Loading on Dynamic Behavior of Soils F. Amlnl Modification by Modal Force Technique A.C.Y. Llq and Y.G. Tsuel

46. Experimental Techniques V Thermoelastic Vibration Test Techniques M.W. Kehoe and H.T. Snyder Mode Shape Measurement Using a Scanning Laser Doppler Vibrometer P. Srlram, S. Hanagud and J.1. Cralg

Perturbation Analysis of Free-layer Viscoelastic Damping Treatments ICK. Steuens Theoretical Modeling of the Damping Produced by Fatigue Cracks ICY. Sanllturk Frequency Modification of Damped Mechanical Systems E.K.L. Yee and Y.G. Tsuei Dynamics of Partially Viscoelastically Supported Plate Y A . Wang and H.Y. Chu

Effect of Excitation Signal in the Quality of Frequency Response T.Yamaguchl

49. Vehicular I1

A Survey of Data Acquisition and Analysis Methods for Harmonic Waveforms F. Rouurals

Dynamic Simulation of Lateral and Vertical Behavior of Passenger Rail Cars F. Tlntl and C. ScafPdl

An Application of Unbiased Estimation of Operating Shapes

The Application of ITD Modal Test Method to the Analysis of Dynamic Characteristics of Road Vehicle Structures Z.-A. Shao. T.Y. Join and W.F. Zhang

J. Pon Identification of Dynamic Mass and Transducer Mass-loading Effects 0.Dosslng

47. Linking Analysis and Test V I Comparing Measured and Predicted Spatial Properties B.J. Dobson and H.G. Lee Model Updating Under Incomplete and Noisy Modal Test Data

L. Eckert Real Mode Computation From Identified Modal Parameters With Estimate of Generalized Damping A. Seatleri Evaluation of Expansion Processes on Model Updating Procedures J. O'Callahan Localization of Model Errors With Structural Connectivity Constraint J. O'Callohan Identification of Orthotropic Complex Material Properties Using a Mixed Numerical/Experimental Technique J. DeVlsscher. H. Sol and W.P. DeWllde

48. Damping I1 Identification of Damping Matrix for Non-proportionally Damped System X Ma, Z. Llang and G.C. Lee

Test Method for Checking the Efficiency of Passenger Car Shock Absorbers H. Troldl Statistical Variation of Modal Parameters in Production Level Vehicles W. Osborne and W.F. Resh

50. Model Updating: The GARTEUR Project R.O. Hayon and DJ.Ewins For the past three years, the aerospace research community in Europe has been collaborating on a GARTEUR-sponsoredexercise to explore model updating methods. Using common test cases, researchers in France, Netherlands, Germany and the UK have sought to locate and to correct errors in dynamic models of a range of structures. In this session, the coordinators of the project will first summarize the overall plan of the activity and this will be followed by presentations from representatives of each of the participating organizations who will describe their individual experiences and results for the set test cases. The major participants are the national aerospace research institutes in each of the four participating countries: ONERA France; DLR Germany; NLR -The Netherlands; and RAE UK with contributions a161 from University Besanco. France; Dornier; MBB; University of Kaasel. Denmark; Fokker. The Netherlands; Katholic University of Leuven, Belgium; and Imperial College, London. UK.

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