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Lothar Gaul

o. Prof. Dr.-Ing. habil.
Lothar Gaul

 This picture shows Lothar Gaul
Phone 0049 711 685-66278
Fax0049 711 685-66282
Room3.127
Email address
Address
Universität Stuttgart
Institut für Angewandte und Experimentelle Mechanik
Pfaffenwaldring 9
70569 Stuttgart
Deutschland

Subject:

  

Computational Methods (Computer aided Engineering: Finite Element Method (FEM) and Boundary Element Method (BEM))

Experimental (CAT: Modal Analysis, Optoelectronics, Holography ) research of mechanics of elastic and viskoelastic continua

Adaptronics

Active Vibration Control (AVC)

Active Noise Control (ANC)

Active / Passive Structural Health Monitoring

Machine Dynamics

Structure-Acoustic / Hydroacoustic Interaction

Soil-Structure Interaction

Biomechanics

History of Mechanics

Curriculum vitae:

  

EDUCATION

Dr.-Ing. habil. University of Hanover (Mechanical Engineering) 1980

Dr.-Ing. University of Hanover (Mechanical Engineering) 1976

M Eng. University of Hanover (Mechanical Engineering) 1973

Degree in Mech. Eng. (FHS Wilhelmshaven) 1969

Degree in Welding Eng. (SLV Berlin) 1969

 

PROFESSIONAL AND ACADEMIC EXPERIENCE

 

Elected Senator in the Senate of Universität Stuttgart, 2002-2006.

Dean, Process Engineering and Engineering Cybernetics, Universität Stuttgart, 1999-2002.

Director, Institute of Applied and Experimental Mechanics, Universität Stuttgart, 1993-Present.

Full Professor of Mechanics, Universität Stuttgart , 1993-Present.

Vice Secretary GAMM, 1995 - 2002

Dean School of Mech. Eng. Univ. Federal Armed Forces Hamburg, 1991 – 1993

Full Professor and Head Institute of Mechanics Univ. Federal Armed Forces Hamburg, 1981 – 1993

Visiting Professor, Dept. of Ocean Eng., Florida Atlantic University, Boca Raton, USA, 1996-Present;

Distinguished Schmidt Visiting Professor, FAU Center of Applied Stochastics Research, 2001, 2002

Visiting Professor, Dept. Civil Eng. & Appl. Mech., McGill University, Montreal, Canada, 2000

Visiting Professor, Dept. Civil Eng., PUC, Rio de Janeiro, Brazil, 1999

Visiting Professor, Dept. Mech. Eng., Georgia Institute of Technology, Atlanta, USA, 1992

Visiting Professor, Dept. of Civil Eng., Columbia University in the City of New York, USA, 1990

Courtesy Professor of Engineering in the College of Engineering & Computer Science at Florida Atlantic University , 2009 - Present

 

HONOURS AND AWARDS

 

Elected Reviewer (Fachkollegium, Branch 402 “Mechanics”) German Research Society (DFG), 2007.

Research Auditor Daimler Corporation, 2002.

Recipient Hon. Ring German Eng. Society for Outstanding Achievements in Engineering 1985.

Recipient Hon. Medal German Eng. Soc.(VDI) for Merits in Engineering and the VDI, 2007

Elected Reviewer German Research Society (DFG) 1996-Present.

Offer Chair A of Mechanics and Director Material Testing Lab. Techn. Univ. Munich 1996

Offer 1 st Chair of Mechanics, Ruhr-Universität Bochum 1985.

 

PROFESSIONAL AND SCHOLARLY ACTIVITIES, PATENTS, ETC.

 

Member, Editorial Board, Computer Modeling in Engineering & Sciences (2002-Present)

Director of CAE + CAT Consulting, Ludwigsburg, Germany.

Consultant to: Daimler, Stuttgart, 1993-Present; Bosch, Stuttgart, 1996-Present; Fraunhofer Society, Stuttgart, (1992-Present); Consultant to Voith, Heidenheim, 1999; MAN-GHH Borsig, 2000-Present

Member Committee Noise Reduction on Naval Ships, 1989-Present

Member German Eng. Society (VDI) Board Vibration Engineering, 1990-Present.

Member VDI, DVS, IABM, ISBE, SEM,

Vice Secretary, GAMM (Society of Applied Mathematics and Mechanics), 1995-Present.

Senior Mentor SimTech (Cluster of Excellence),University of Stuttgart, 2007-present

Regional Editor, Mechanics Research Communications (2000-Present)

Member, Editorial Board, Mechanical Systems and Signal Processing (1996-Present)

Member, Editorial Board, Engineering Analysis with Boundary Elements (1998-Present)

Sole Patentee, "Seal with Polygon Profile": German Patent Number: 4130767 C2 (1991)

Sole Patentee, "Smart Joint": German Patent Number: 19702518 C2 (1997)

Patentee, "Einrichtung zur aktiven und/oder passiven Schwingungsbeeinflussung eines transparenten, dünnwandigen Elements und deren Verwendung": German Patent Number: 10 2005 044 448 (2005)

Further information:
 

CURRENT RESEARCH INTERESTS

Numerical Simulation and Computer-Aided Testing (CAT) of Mechanical and Adaptive Structures. Development of Boundary Element and Finite Element Formulations for Fluid-Structure Interaction, Soil-Structure Interaction, Machine Dynamics, Contact Dynamics of Structural Joints and Brakes, Piezoelectrics; implementation of Generalized Damping Description and Uncertain Parameters by Fuzzy Arithmetic; CAT with novel measurement technologies, including 3-D Electronic Speckle Pattern Interferometry (CW-ESPI, Pulse-ESPI), Non-contact Measurement for Modal Testing, Wave Propagation Techniques for Structural Health Monitoring. Adaptive Structures; Damping Control by Active Joints, Active Vibration Isolation, Active Structural Acoustic Control.

 

RESEARCH SUPERVISION:

Supervisor  34 Doctoral Students ; Co-Supervisor 19 Doctoral Students 8 Post-Doctoral Associates for Habilitation Theses.

Initiated and hosted the stay of three Alexander von Humboldt Research Award Winners from the USA, Japan and Canada. Proposed the Max-Planck-Research Award for International Cooperation 2003. Bilateral programs such as PROBRAL and ISAP provide a frame for ongoing scientific exchange between PUC Rio de Janeiro an Georgia Tech respectively with the Institute of Applied an Experimental Mechanics at University of Stuttgart.    

 

Publikationen:

 
Books: Boundary Element Methods for Engineers and Scientists, L. Gaul, M. Kögl, M. Wagner, Springer Berlin (2003)
 
Contact Mechanics , L. Gaul and C.A. Brebbia (Eds.), WIT Press Southampton (1999).
 
Methode der Randelemente in Statik und Dynamik , L. Gaul and C. Fiedler, Vieweg Braunschweig (1997)
Chapters in Books: Contributor to 7 Books.
 
Refereed Journal Publications: Author or Co-Author of 105 papers in Refereed Journals covering continuum mechanics, waves, vibrations, discretization methods and history of mechanics. (Recent Publ. are given below)
 
Refereed Conference Publications: Author or Co-author of more than 145 publications on the above topics.
   
SIGNIFICANT RESEARCH AND PROFESSIONAL CONTRIBUTIONS
  • Generalisation of Reissner’s halfspace theory for 3-D viscoelastic soil interacting with rigid and flexible vibrating foundations of arbitrary shape.
  • Development of an experimental approach for the identification of obstacles imbedded in soft soil by holographic surface wave measurements. Calculation and experimental verification of vibration isolation of machine foundations by underlying concrete blocks in soil.
  • Generalisations of his static hybrid Boundary Element Formulations based on multifield variational problems to elastodynamics and acoustics. These formulations were cast into powerful fluid-structure interaction software.
  • Contributions to dynamic contact formulations emerged from the idea to derive macroscale contact laws from microscale interface physics based on statistics of surface roughness measurements. FE implementations lead to various applications including rolling contact and metal forming with superimposed ultrasound.
  • Contributions to Structural Health Monitoring range from source identification methods to the development of smart layers which actuate and sense wave fields and process the signals for conditions identification.
  • Merged structural dynamics, actuator and sensor implementation and control design (Lyapunov-, Neural Network-, Modal-control) in adaptive structure acoustic control (ASAC) or active vibration and damping control.
  • Initiated and hosted the stay of three Alexander von Humboldt Research Award Winners from the USA, Japan and Canada. Bilateral programs such as PROBRAL and IAS provide a frame for ongoing scientific exchange between PUC Rio de Janeiro and Georgia Tech respectively with the Institute of Applied and Experimental Mechanics at University of Stuttgart.

 
SELECTED RECENT JOURNAL PUBLICATIONS
P.S. Selvaduray, K. Willner, L. Gaul: On frictionally constrained wing-cracks. Archives of Mechanics, Volume 57, Issue 2-3, Polish Academy of Sciences Warszawa, 2005, pp. 189 - 207
O. M. Fein, L. Gaul, U. Stöbener: Vibration Reduction of a Fluid-loeded Plate by Modal Control. Journal of Intelligent Material Systems and Structures, Vol 16, No. 6, (2005) SAGE-Publications, pp. 541 - 552
M. Fischer, L. Gaul: Application of the Fast Multipole BEM for Structural-Acoustic Simulations. Journal of Computational Acoustics (IMACS), Vol. 13, No. 1 (2005), pp. 87 - 98
L. Gaul, R. Allgaier, K. Willner, W. Keiper: Untersuchungen zum Bremsenquietschen am Balken-Scheibe-Modell. Konstruktion - Zeitschrift für Produktentwicklung, Springer-VDI-Verlag, Heft 6, 2005, S. 1 - 3
M. Fischer, L. Gaul: Fast BEM-FEM mortar coupling for acoustic-structure interaction. International Journal for Numerical Methods in Engineering (John Wiley & Sons, Ltd.), Vol. 62, Issue 12, 2005, pp. 1677 - 1690
S. Hurlebaus, L. Gaul: Calculating the Eigenfrequncy of rotating acoustic annulus inside labyrinth seals of  turbo machines. J. of Engineering for Gas Turbines and Power, ASME, Vol. 127, No. 1, 2005, pp. 178 - 181
M. Wagner, L. Gaul, N. A. Dumont: The hybrid boundary element method on structural acoustics. ZAMM 84, Wiley-Ych Verlag, 2004, pp. 780 - 796
N. Hoffmann, N. Wagner, L. Gaul: Quenching mode-coupling friction-induced instability using high-frequency dither. Journal of Sound and Vibration 279 (2005), Elsevier, pp. 471 - 480
L. Gaul, H. Albrecht, J. Wirnitzer: Semi-active friction damping of large space truss structures. Shock and Vibration, Vol. 11, No. 3/4 2004 (Special issue dedicated to Professor Bruno Piombo) IOS Press, Amsterdam, pp. 173 - 186
O. Fein, L. Gaul: On the Application of Shunted Piezoelectric Material to Enhance Structure Damping of a Plate. Journal of Intelligent Material Systems and Structures, Vol 15, 2004. Sage Publications, pp. 737 - 743
S. Hurlebaus, L. Gaul: Smart Layer for Damage Diagnostics. Journal of Intelligent Material Systems and Structures, Vol 15, Sept./Oct. 2004. Sage Publications , pp. 729 - 736
M. Kögl, S. Hurlebaus, L. Gaul: Finite Element simulation of non-destructive damage detection with higher harmonics. NDT & E International, Vol. 37, No. 3, Elsevier 2004, pp. 195 - 205
H. Hoffmann, L. Gaul: A sifficient criterion for the onset of sprag-slip oscillations. Archive of Applied Mechanics (AAM), Volume 73m Number 9-10, Springer 2004, pp. 650 - 660
M. Fischer, U. Gauger, L. Gaul: A multipole Galerkin boundary element method for acoustics. Analysis with Boundary Elements, Vol. 28, pp. 155 - 162
N. Hoffmann, L. Gaul: Non-conservative beating in sliding friction affected systems: transient amplification of vibrational energy and a technique to determine optimal initial conditions. Machanical Systems and Signal Processing (MSSP) 18, 2004, pp. 611 - 623
L. Gaul, M. Fischer, U. Gauger: Accuracy and Efficiency of the Multipole Galerkin BEM for Acoustics. Theoretical and Computational Acoustics 2003 (Proceedings of the 6^th International Conference on Theoretical and Computational Acoustics, ICTCA, Honolulu). World Scientific Publishing Co. Pte. Ltd., Singapore, 2004, pp. 97 – 106
L. Gaul, M. Kögl: Free vibration analysis of anisotropic solids with the boundary element method. Engineering Analysis with Boundary Elements. Elsevier, Vol. 27, No. 2, 2003, pp. 107 - 114
L. Gaul, M. Fischer, U. Nackenhorst: FE/BE Analysis of Structural Dynamics and Sound Radiation from Rolling Wheels, Computer Modeling in Engineering & Sciences (CMES), Vol. 3, No. 6, 2002, Tech Science Press, pp. 815 - 823
L. Gaul, A. Schmidt: Finite Element Formulation of Viscoelastic Constitutive Equations Using Fractional Time Derivates, Nonlinear Dynamics 29, 2002, pp. 37 - 55
L. Gaul, M. Hanss, S. Hurlebaus: Fuzzy Sensitivity Analysis for the Identification of Material Properties of Orthotropic Plates from Natural Frequencies. Mechanical Systems and Signal Processing (MSSP), 2002, 16(5), pp. 769 - 784
L. Gaul, W. Wenzel: A coupled symmetric BE-FE methkod for  acoustic fluid-structure interaction. Engineering Analysis with Boundary Elements, Vol. 26, No. 7 (July) 2002, pp. 629 - 636
L. Gaul, F. Moser: Non-singular symmetric boundary element formulation for elastodynamics,  Engineering Analysis with Boundary Elements, Vol. 25, No. 10, December 2001, Elsevier, pp. 843-849
L. Gaul, R. Nitsche: The role of friction in mechanical joints. Applied Mechanics Reviews, Vol. 54, No. 2, March 2001 (ASME), pp. 93 - 106
L. Gaul, R. Nitsche: Lyapunov design of damping controllers, Archive of Applied Mechanics 72 (2003), Springer Verlag 2003, pp. 865 - 874
L. Gaul: Soil-Structure Interaction - Generalization of Reissner's Solution for the Viscoelastic Halfspace (In memoriam Eric Reissner), ZAMM 80 (2000) 1, S. 69 - 76
L. Gaul: The Influence of Damping on Waves and Vibrations. Mechanical Systems and Signal Processing, MSSP, (1999) 13 (1), 1 – 30
 
INVITED KEYNOTE AND PLENARY LECTURES (2003 - 2006)
L. Gaul: Fast Multipole Boundary Element Method for the Simulation of Acoustic-Structure Interaction. IABEM 2006 Conference Graz, Austria, Keynote Lecture, 10.07.2006
L. Gaul: Geregelte Reibungsdämpfung durch optimal platzierte Fügestellen. Wissenschaftliches Kolloquium "Aktuelle Entwicklungen und Anwendungen von Simulations- und Testverfahren in der Strukturmechanik" anlässlich der Verabschiedung von Herrn Prof. Dr.-Ing. Michael Link, Universität Kassel, 28.06.2006
L. Gaul: Simulation of Acoustic Fluid-Structure Interaction with Advanced "Boundary Element Technics", Montreal, 28.07.2005
L. Gaul: Adanced boundary element formulations for mutifield problems. Keynote lecture. Forum Prediction of Noise Design, NOVEM 2005 (Noise and Vibration Emerging Methods), ST. Raphaël, 20.04.2005
L. Gaul: Simulation of Coupled Field Problems with the Boundary Element Method. Invited Plenary Secture, 76 th  GAMM Annual Scientific Conference, Luxembourg, 31.03.2005
L. Gaul: Structural Health Monitoring Research at the Institute A of Mechanics. Department of Civil Engineering, Massachusetts Institute of Technology (MIT), Cambridge, 29.10.2004
L. Gaul: Fast Boundary Element Calculation of Acoustic Radiation from Vibrating Structures by Mortar Coupling. Keynote Lecture, International Conference on Computational & Experimental Engineering and Sciences, Madeira, Portugal, 28.07.2004
L. Gaul: Global and local semi-active vibration control concepts for lightweight structures. Plenary Lecture Nordic Vibration Research 2004, KTH Stockholm, Schweden, 04.06.2004
L. Gaul: Semi-Active Friction Damping of Deployable Truss Structures. Lecture dedicated to Professor Tsuneo Someya an the occasion of awarding the degree of Doctor Honoris Causa. The Technical University of Łódź, 01.10.2003
L. Gaul: Simulation of Large Space Truss Structures with Semi-Active Friction Joints. Minisymposium: Dynamics of Jointed Structures. 7 th U.S. National Congress on Computational Mechanics (USNCCM), Albuquerque, New Mexico, 30.07.2003
L. Gaul: Simulation of automotive noise by advanced boundary element methods. Keynote address 15 th International Conference on Boundary Element Technology BETECH 2003, Dearborn Detroit, 20.05.2003