Vita - Department of Engineering Science and Mechanics - Virginia

95 Pages·2016·0.51 MB·English

VITA
NAME: Ali Hasan Nayfeh
RANK: University Distinguished Professor Emeritus
VirginiaPolytechnic Institute and State University
540-231-6871(Sally)/FAX[phone]/[email protected]/WEBhttp://www.esm.vt.edu/∼anayfeh/
DATE OF BIRTH: December 21, 1933
CURRENT FIELDS OF INTEREST
Perturbation methods, nonlinear dynamics, linear and nonlinear control, dynamics and control of power
systems, structural mechanics, shipand submarine motion,acoustics, hydrodynamicstability,aerodynamic,
nonlinear waves, flight mechanics
EDUCATION
1962,B.S., Stanford University, Engineering Science, Great Distinction
1963,M.S., Stanford University,Aeronautics and Astronautics
1964,Ph.D., Stanford University, Aeronautics and Astronautics
SERVICE
1976-1977 Chairman of a committee of 35 US educators that established the College of Engineering at
King Abdulaziz University in Jeddah, Saudi Arabia.
1980-1984 Chairman of a committee that established the College of Engineering, served as Dean of Engi-
neering and Vice President for engineering affairs.
1988 Chairman of the NSF Steering Committee on Nonlinear Dynamics, with D. T. Mook, Nonlinear
Dynamics, Volume 5 of Research Needs in Dynamic Systems and Control, published by
ASME for NSF, April.
1988-present Member of the US Transition Study Group.
1994-1995 AconsultantwithfiveUSandEuropeaneducatorsforestablishingabranchofRiyadhUniversity
at Abha, Saudi Arabia.
1996- Member of the External Review Board of the Center for Aerospace Research.
1998- Member ofthe Advisory CommitteeInternationalSymposiumon VibrationsofContinuousSystems.
2003 Member of the International Advisory Committee of the MDP-8 Conference, Cairo Egypt, January
4-6.
2006- Member of the International START-/WittgensteinJury, Vienna, Austria.
2007 Member of the Engineering Science and Mechanics Norris HallSpace Review Panel, September. This
panel proposed to recreate community in Norris Hall by building welcoming communal learning, dis-
covery and outreach spaces for students.
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TEACHING EXPERIENCE
1971-present VirginiaPolytechnic Institute and State University
1980-1984 Yarmouk University, Irbid, Jordan: Established a College of Engineering, served as Dean of
Engineering and Vice President for engineering affairs.
SHORT COURSES
1974 Organizedandgavefourlectures,andashortcourseonPerturbationMethods,UniversityofTennessee
Space Institute, November 11-15,1974.
1975 Organized and gave a series of lectures on Perturbation Methods at the Institute for Fluid Dynamics
and Applied Mathematics, University of Maryland, College Park, MD, June 9-13, 1975.
1979 Participatedinashortcourse onPerturbationMethods,InternationalCenterforMechanicalSciences,
Udine, Italy, October 10-19,1979.
1984 15-hour workshop on Perturbation Methods and Nonlinear Mechanics, Institute of Aeronautics and
Astronautics, National Cheng Kung University, Tainan,NationalRepublic of China, March 1984.
1987 12-hourlecture onPerturbation Theory atthe XII Summer Schoolon MathematicalPhysics, Univer-
sita Degli Studi Di Napoli,Napoli, Italy,September 14-26,1987.
1991 Nayfeh,A.H.,Mook,D.T.,and Balachandran,B.,“FundamentalConcepts ofthe Modern Theory of
Nonlinear Dynamics,” AIAA Professional Studies Series Modern Analysis of Nonlinear Systems with
Applications, New Orleans, LA, August 15-16,1991.
1992 “NonlinearDynamicsandControlwithApplicationtoAirplanes”NASAShortCourse,NASALangley
Research Center, Hampton, VA, July 26-August 5, 1992.
1996 “NonlinearDynamicsandControlwithApplicationtoAirplanes”NASAShortCourse,NASALangley
Research Center, Hampton, VA, March 11-15,1996.
GRADUATE PROGRAMS SUPERVISED
Senior Projects:
1. Neal, H. L., 1988 “Nonstationary Response of a Nonlinear System to Nonperiodic Parametric Excita-
tions with Varying Frequency”
2. Nayfeh, T. A., 1989 “Modal Interaction in Structures – Theory and Experiment”
3. Nayfeh, S. A., 1990 “Nonlinear Oscillations of a Stretched String” Winner of the D. H. Pletta Award
for the outstanding senior project.
4. Fripp, M., 1992 “Experimental Investigation of Linear Bearings”
5. Kreider,W.,1993“AnAnalyticalandExperimentalInvestigationoftheNaturalFrequenciesandMode
Shapes of a Buckled Beam with Fixed Ends”
6. Popovic,P.,1994“AnExperimental InvestigationofEnergy Transfer froma High-Frequency Mode to
a Low-Frequency Mode in a Flexible Structure”
7. Hall,B., 1997“The Identification of a Nonlinear, NonidealVibrating System,” selected for Honorable
Mention
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Master of Science:
1. Asfar, O., 1973 “An Analytical Solution of the Nonlinear Eddy current Losses in Ferromagnetic Ma-
terials”
2. Shaker, B. S., 1974 “Influence of Linear Thickness on Wave Propagation in Ducts”
3. Atta, E. H., 1974 “Unsteady Flow over Arbitrary Wing-PlanformsIncluding Tip Separation”
4. Asfar, K. R.,1978 “Application of the Vortex-Lattice Technique to Arbitrary Bodies”
5. Huddleston, D.,1978 “Resonant Acoustic Frequencies of Parallel Plates”
6. Page, M., Nonthesis
7. Reed, H. L., 1980 “Closed-Form Solutions for Subsonic Flows Over Plates with Porous Strips”
8. Shayan, T., 1981 “An Analysis of Cubic Nonlinear, Multidegree-of-Freedom Systems Including the
Interaction of Parametric and External Excitations”
9. Abu Arish, A., 1983 “The Response of Single-Degree-of-Freedom Systems with Cubic and Quartic
Nonlinearities to a Harmonic Excitation”
10. Serhan, S., 1985 “Vertical Vibration of Machine Foundations”
11. Raouf,R. A., 1985 “Nonlinear Forced Response of Circular Cylindrical Shells”
12. Jebril,A.,1985“TheResponse ofTwo-Degree-of-FreedomSystems with Quadraticand CubicNonlin-
earities to Multifrequency Parametric Excitations - Application to an Arch”
13. Feeny, B. F., 1986 “Identification of Nonlinear Ship Motion Using Perturbation Techniques”
14. Al-Maaitah,A. A., 1986 “Effect of Roughness Element on the Stabilityof Boundary Layers”
15. Bouguerra, H., 1987 “Non-Linear Response of a Fluid Valve”
16. Krishna, R. C., 1988 “Effect of Surface Imperfections on the Stabilityof LaminarBoundary Layers”
17. Masad, J. A., 1988 “Subharmonic Instability in Boundary Layers”
18. Colbert, M. A., 1990 “An OptimalSystem for Three-Dimensional Motion Measurement”
19. Heydon, B., 1990 “Adaptive Quenching in Nonlinear Systems”
20. Nayfeh, M. A., 1990 “Nonlinear Dynamics of Power Systems”
21. Neal, H.L., 1990“Nonstationary Response of Nonlinear Systems to Frequency and Amplitude Modu-
lated Excitations”
22. Nayfeh, T. A., 1991 “Dynamics of Three-Degree-of-Freedom Systems with Quadratic Nonlinearities”
23. Kreider, M. A.,1992 “A Numerical Investigationof the GlobalStabilityof Ship Roll: InvariantMani-
folds, Melnikov’sMethod, and Transient Basins”
24. Yana,M., 1993 “An Investigation of Flow-Induced Vibrations of a Steam-Generator Tube”
25. Abu-Khajeel, H., 1993 “Effect of Humps on the Stability of Boundary Layers Over an Airfoil”
26. Nayfeh, S., 1993 “Nonlinear Dynamics of Systems InvolvingWidely Spaced Frequencies”
27. Ashour, O., 1993 “Receptivity to Free Stream Acoustic Disturbances due to a Roughness Element on
a Flat Plate”
28. Kreider, W., 1995 “Linear and Nonlinear Vibrations of Buckled Beams”
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29. Fiedler, L., 1996 “An Experimental and Theoretical Investigation into the Influence of Hysteretic
Dampingon the Dynamic Behavior of a Three-Beam Structure”
30. Lacarbonara, W., 1997 “A Theoretical and Experimental Investigation of Nonlinear Vibrations of
Buckled Beams”
31. Krauss, R. W. 1998 “Experimental Identification of Nonlinear Systems”
32. Fung,J.,1998“ParameterIdentificationofNonlinearSystemsUsingPerturbationMethodsandHigher-
Order Statistics”
33. Al-Fayyoumi,M., 1998 “Nonlinear Dynamics and Interactions in Power Electronic Systems”
34. Manzione, P., 1999 “Nonlinear Transverse Vibrations of Centrally Clamped Rotating Circular Disks
35. Henry, R. J., 1999 “Cargo Pendulation Reduction on Ship-Mounted Cranes,”
36. Hall,B.D.,1999“NumericalSimulationsoftheAeroelasticResponseofanActivelyControlledFlexible
Wing”
37. Al-Mousa,A.,2000“ControlofRotaryCranesUsingFuzzyLogicandTime-DelayedPositionFeedback
Control”
38. Al-Aqrabawi, M., 2001 “Combat System Modeling: Modeling Large-Scale Software and Hardware
Application Using UML”
39. Younis, M., 2001“Investigation of the Mechanical Behavior of Microbeam-Based MEMS Devices”
40. Daqaq,M., 2003 “Virtual Reality Simulationof Ships and Ship-Mounted Cranes”
41. Abdelkefi, A.,2010,“An Energy Harvester Using Piezoelectric Cantilever Beams Undergoing Coupled
Bending-Torsion Vibrations
Doctor of Philosophy:
1. Bordner, G. L., 1973 “Nonlinear Stability of Thin Liquid Films Adjacent to Compressible Stream”
2. Tsai, M-S., 1974“High Intensity Sound in Lined Ducts”
3. Kandil, O. A., 1974 “Prediction of the Steady Aerodynamic Lifting Surfaces Having Separation at
Sharp Edges”
4. Sridhar, S., 1975 “Nonlinear Resonances in Systems Having Many Degrees of Freedom”
5. Asfar, O. R.,1975 “Perturbation Theory of Modes in Nonuniform Wave Guides”
6. Lobitz, D. W., 1975 “Linear and Nonlinear Vibrations of Irregular Structural Elements”
7. Sun,J.,1975“Effects ofIsotropicandAnisotropicBulkLinersonWavePropagationinDuctsCarrying
Flows”
8. Shaker, B. S., 1976 “Transmission of Sound Through Nonuniform Circular Ducts with Compressible
Mean Flows”
9. Lekoudis, S., 1976 “Nonlinear Resonant Interactions in Supersonic Wind Generated Waves”
10. Atta, E. H., 1978 “Nonlinear Steady and Unsteady Aerodynamics of Wings and Wing-Body Combi-
nations”
11. El-Hady,N., 1978 “NonparallelStability of Compressible Boundary Layer Flows”
12. Bozatli,A.N.,1979“EffectsofWallUndulationsandInteractionofDisturbanceWavesontheStability
of Boundary Layer Flows”
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13. Marshall,R.L.,1979“AnExperimental Study ofAcousticPropagationandAttenuation inaCircular
Annular Duct with Variable Cross-Sectional Area”
14. Kelly,S.G.,1979“NonlinearInteractions ofAcousticFieldswithBodies underHarmonicExcitations”
15. Ragab,S. A., 1979 “Viscous-Inviscid Interacting Flows and Some Aspects of their Stability”
16. Padhye, A., 1980 “NonparallelStability of Three-Dimensional Flows”
17. Asfar, K. R., 1980 “Response of Self-Excited Multidegree-of-Freedom Systems to Multifrequency Ex-
citations”
18. Kelly,J.,1981 “Acoustic Propagation inNonuniformCircular Ducts Carrying Near-Sonic Meanflows”
19. Reed, H. L., 1981 “The Tollmien-SchlichtingInstabilityof Laminar Viscous Flows”
20. Yen, A. T., 1981 “A Continuous-Vorticity Panel Method for the Prediction of Steady Aerodynamic
Loads on Lifting Surfaces”
21. Asrar, W.,1983 “Stabilityof Heated Boundary Layers”
22. Klimkowski,J. Z., 1984 “Gortler Instabilityof Compressible Flows with Pressure Gradients”
23. Elzebda, J. M., 1986“Two-Degree-of-Freedom Wing Rock and Nonlinear Aerodynamic Interference”
24. Zavodney,L. D., 1987“A Theoretical and Experimental Investigation of ParametricallyExcited Non-
linear Mechanical Systems”
25. Mracek, C. P. Capt., 1988 “Unsteady Potential-Flow Solution Using Vortex Panels Coupled with
Dynamics and Controls”
26. Al-Maaitah, A. A., 1989 “Effect of Suction and Cooling on the Stability of Subsonic and Supersonic
Boundary Layers”
27. Serhan, S. J., 1989 “Response of Nonlinear Structures to Deterministic and Random Excitations”
28. Raouf,R. A., 1989 “Modal Interactions in Shell Dynamics”
29. Sanchez, N. E., 1989 “Stabilityof Nonlinear Oscillatory Systems with Applicationto Ship Dynamics”
30. Masad, J. A., 1990 “Secondary Instabilities of Boundary Layers”
31. Nayfeh, J. F., 1990 “Dynamics of Composite Plates Using Higher-Order Shear Deformation Theory”
32. Pai, P. F., 1990 “Nonlinear Flexural-Flexural-TorsionalDynamics of Metallic and Composite Beams”
33. Balachandran, B., 1990 “A Theoretical and Experimental Study of Modal Interactions in Structures”
34. Hadian,J., 1991 “ModalInteractions in the Dynamic Response of Isotropic and Composite Plates”
35. Abou-Rayan,A., 1991 “Deterministic and Stochastic Responses of Nonlinear Systems”
36. Oh, I., 1992 “A Theoretical and Experimental Investigation into the Nonlinear Dynamics of Floating
Bodies”
37. Anderson, T. J., 1993 “Nonlinear Vibrations of Metallicand Composite Structures”
38. Bikdash, M. U., 1993 “Time-Optimaland Saturating Controls with Applications to Space Structure”
39. Chin, C-M., 1993“Problems in Nonlinear Dynamics”
40. Oh,K.,1994“ATheoreticalandExperimentalStudyofModalInteractionsinMetallicandLaminated
Composite Plates”
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41. Tabaddor,M., 1996 “Nonlinear Vibration of Beam and Multibeam Systems”
42. Harb, A., 1996 “Application of Bifurcation Theory to Subsynchronous Resonance in Power Systems”
43. Pratt, J., 1997 “Vibration Control for Chatter Suppression with Application to Boring Bars”
44. Lacarbonara,W.,1998“ApproximateMethodsandModelsinNonlinearVibrationsofOne-Dimensional
Systems with InitialCurvature,” (University of Rome “La Sapienza”, Rome, Italy)
45. Oueini, S., 1999 “Techniques for ControllingStructural Vibrations”
46. Arafat, H., 1999 “Nonlinear Response of Cantilever Beams”
47. El-Badawy,A.,2000“StructuralIdentificationandBuffet AlleviationofTwin-TailedFighterAircraft”
48. Masoud,Z.,2000“AControlSystemfortheReductionofCargoPendulationofShip-MountedCranes”
49. Suleiman,B., 2000 “Identification of Finite-Degree-of-Freedom Models for Ship Models”
50. Fahey, S., 2000 “Parameter Identification of Structural Systems Possessing One or Two Nonlinear
Normal Modes”
51. Mazumder, S., 2001 “Nonlinear Analysis and Control of Standalone and Parallel DC-DC and Multi-
Phase Switching Converters”
52. Ashour, O., 2001 “Nonlinear Control of Plate Vibrations”
53. Alhazza, K., 2002 “Nonlinear Vibrations of Doubly Curved Cross-Ply ShallowShells”
54. Emam,S., 2002 “A Theoretical and Experimental Study of Nonlinear Dynamics of Buckled Beams”
55. Thomsen, J. J., 2003 External Examiner of the Doctoral Thesis of J. J. Thomsen, Copenhagen, Den-
mark, May 12-18
56. Omar, H. M.,2003 “Control of Gantry and Tower Cranes”
57. Malatkar,P., 2003 “Nonlinear Vibrations of Cantilever Beams and Plates”
58. Faris, W., 2003 “Nonlinear Dynamics of Annular and Circular Plates under Thermal and Electrical
Loading”
59. Younis, M., 2004 “Modeling and Simulation of Microelectromechanical Systems in Multidisciplinary
Fields”
60. Zhao, X., 2004 “Modeling and Simulationof MEMS Devices”
61. Reddy, Chevva Konda, 2005“Practical Challenges in the Method of Controlled Lagrangians”
62. Daqaq, M., 2006, “Adaptation of Nontraditional Control Techniques to Nonlinear Micro and Macro
Mechanical Systems”
63. Vogl, G., 2006, “Nonlinear Dynamics of Circular Plates Under Electrical Loadings for Capacitive
Micromachined Ultrasonic Transducers (CMUTs)”
64. Akhtar, I., 2008, “Parallel Simulation, Reduced-Order Modeling, and Feedback Control of Vortex
Shedding using Fluidic Actuators”
65. Hammad, B., 2008, “Modeling, Simulation, and Analysis of Micromechanical Filters Coupled with
Capacitive Transducers”
66. Marzouk, O., 2009, “Simulation, Modeling, and Characterization of the Wakes of Fixed and Moving
Cylinders”
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67. Abdelkefi, A.,2012,“GlobalNonlinearAnalysis ofPiezoelectric Energy Harvesting fromAmbientand
Aeroelastic Vibrations”
68. Bahrami, A., 2012,“Nonlinear Dynamics of TappingMode Atomic Force Microscopy”
69. Taha,H.E., 2013,“Mechanics ofFlappingFlight: AnalyticalFormulationsfor Unsteady Aerodynam-
ics, Kinematic Optimization,Flight Dynamics and Control”
INDUSTRIAL EXPERIENCE
1964-68 Heliodyne Corporation Worked on: reentry physics, orbital mechanics, shock wave structure,
plasma waves, nonlinear vibrations, asymptotic expansions
1969-71 AerothermCorporation(Manager-MathematicalPhysicsDepartment)Workedon: reentryphysics,
orbitalmechanics, flightmechanics, water waves, hydrodynamic stability,transpiration cooling,waves
in elastic media, asymptotic expansions
HONORS AND RECOGNITIONS
1. American Friends of the Middle East Scholarship, 1959-1962
2. Stanford University Scholarship, 1959-1962
3. Department of Aeronautics and Astronautics Affiliates Scholarship, 1962-1964
4. Third Annual Stanford School of Engineering Scholastic Prize, 1962
5. Certificate for Excellence in Teaching, 1974,1975, 1976
6. Named University Distinguished Professor of Engineering, 1976
7. Election to the Academy of Teaching Excellence, 1976
8. Society of Engineering Science, Certificate of Appreciation in Recognition of Outstanding Service to
the Society, Member, Board of Directors, 1980-1983
9. Kuwait Prize in Basic Sciences (Physics), 1981
10. Yarmouk University Research Award, 1982
11. Alexander von Humboldt FoundationSenior Award, Germany,1988
12. Listed in Outstanding Educators of America
13. Listed in Who’s Who in America
14. Listed in American Men of Science
15. Listed in Who’s Who in Aviationand Aerospace
16. Listed in Who’s Who in the East
17. Listed in Who’s Who in Science and Technology
18. American Institute of Aeronautics and Astronautics Pendray Aerospace Literature Award, 1995 (For
seminal contributions to perturbation methods, nonlinear dynamics, acoustics, and boundary-layer
transition; praiseworthy for their quality relevance, timeliness, and lasting influence on the aerospace
community.)
19. Society for Design and Process Science, FoundingBoard Member, Austin, TX, December 6-9, 1995
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20. Honorary Doctorate, Marine Technical University, St. Petersburg, Russia, 1996
21. American Society ofMechanical Engineers J. P.Den Hartog Award, 1997(Presented in recognition of
lifetime contributions to the teaching and practice of vibration engineering.)
22. Frank J. Maher Award for Excellence in Engineering Education, 1997
23. College of Engineering Dean’s Award for Excellence in Research, 1998
24. Honorary Doctorate, Technical University of Munich, Munich, Germany,1999
25. S. K. Mazumder, A. H. Nayfeh, and D. Borojevic, “A Theoretical and Experimental Investigation of
theFast-andSlow-ScaleInstabilitiesofaDC-DCConverter,”IEEETransactionsonPowerElectronics,
Vol. 16,No. 2,2001,pp. 201-216. WinneroftheIEEEPowerElectronicsSocietyTransactions
Prize Paper Award for 2001.
26. Honorary Doctorate, Politechnika Szczecinska, Poland, May 2004
27. ASMELyapunovAwardfirstrecipientof newly establishedandprestigiousaward. (Presented
for lifelongcontributions to the field of nonlinear dynamics), 2005.
28. VirginiaLife Achievement in Science Award, 2005.
29. The Academy Gold Medal of Honor from The Academy of Transdisciplinary Learning and Advanced
Studies (TheATLAS). (In recognition of distinguished contributions to the advancement of transdisci-
plinaryfoundationalideasandactivitieswhichhavebeeninstrumentalindevelopingandimplementing
the concepts and philosophyof transdisciplinary education and research), 2008.
30. AMD/ASME Tom Caughey Award first recipient of newly instituted award. (Presented for
significantcontributionstothefieldofnonlineardynamicsthroughpractice, research, teaching,and/or
outstanding leadership), 2008.
31. Recipient of the Benjamin Franklin Medal in Mechanical Engineering. (Presented for the develop-
ment of novel methods to model complex engineering systems in structural dynamics, acoustics, fluid
mechanics and electromechanical systems), 2014.
CONSULTING AND PATENTS
Spring 1971-1976,Aerotherm Corporation
Spring 1971-1976,Sandia Corporation
Fall1975-1978,ICST
Summer 1978-present, Hersch Engineering Associates
Fall1979-present, Westinghouse Electric
Fall1985-present, Morning International
Winter 1985,Fermi Lab
US Patent No. 6,631,300, Nonlinear Active Control of Dynamical Systems, Oct. 7, 2003, A. H. Nayfeh,
D. T. Mook, Z .N. Masoud, and R. Henry
European Patent No. 1,235,735, Nonlinear Active Control of Dynamical Systems, March 13, 2005, A.
H. Nayfeh, D. T. Mook, Z .N. Masoud, and R.Henry
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US Patent No. 7,044,314,Nonlinear Active Control of DynamicalSystems, May 16,2006,A. H. Nayfeh, D.
T. Mook, Z. N. Masoud, and R. Henry
Chinese Patent No. ZL 00815340.X,NonlinearActive Controlof DynamicalSystems, February 15,2006,A.
H. Nayfeh, D. T. Mook, Z. N. Masoud, and R.Henry
MEMBERSHIP IN SCIENTIFIC AND PROFESSIONAL SOCI-
ETIES
Tau Beta Pi
Phi Beta Kappa
Sigma Xi
American Institute of Aeronautics and Astronautics (Fellow) - 1991
American Academy of Mechanics (Fellow) - 1986
American Physical Society (Fellow) - 1975
American Society of Mechanical Engineering (Fellow) - 1991
Society for Design and Process Science (Fellow) - 1996
American Society of Naval Engineers - 2005
REVIEWER
Journal of Fluid Mechanics
Physics of Fluids
AIAA Journal
Journal of Spacecraft and Rockets
SIAM Journal of Applied Mathematics
Journal of the Acoustical Society of America
Journal of Mathematical Physics
National Science Foundation
Journal of Sound and Vibration
Journal of Applied Mechanics
Journal of Vibration and Acoustics
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Journal of Ship Research
Army Research Center
International Journal of Solids and Structures
Journal of Hydronautics
Celestial Mechanics
IEEE Transactions on Sonics and Ultrasonics
The Physical Review
Journal of Aerospace Engineering
CONTRIBUTING EDITOR
(1988-1990)International Journal of Non-Linear Mechanics
EDITOR-IN-CHIEF
Nonlinear Dynamics
Journal of Vibration and Control (1995-2014)
EDITOR
Nonlinear Science Book Series, Wiley
CONFERENCES ORGANIZED
1. Seventh International Symposium on Nonlinear Acoustics, VPI&SU, Blacksburg, VA, August 19-21,
1976.
2. Second Conference on Nonlinear Vibrations, Stability, and Dynamics of Structures and Mechanisms,
VPI&SU, Blacksburg, VA, June 1-3,1988.
3. Third International Congress of Fluid Mechanics, Cairo, Egypt, January 2-4, 1990.
4. Third Conference on Nonlinear Vibrations, Stability, and Dynamics of Structures and Mechanisms,
VPI&SU, Blacksburg, VA, June 25-27,1990.
5. Fourth International Congress of Fluid Mechanics, Cairo, Egypt, April 28-30,1992.
6. Fourth Conference on Nonlinear Vibrations, Stability, and Dynamics of Structures and Mechanisms,
VPI&SU, Blacksburg, VA, June 7-11,1992.
7. FifthConferenceonNonlinearVibrations,Stability,andDynamicsofStructures,VPI&SU,Blacksburg,
VA, June 12-16,1994.
8. International Conference on Asymptotics in Mechanics, St. Petersburg, Russia, August 14-17,1994.
9. Sixth Conference on Nonlinear Vibrations, Stability, and Dynamics of Structures, VPI&SU, Blacks-
burg, VA, June 9-13, 1996.
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