MODEL UPDATING FOR STRUCTURAL DYNAMICS: PAST, PRESENT AND FUTURE OUTLOOK

During the past two decades, finite element model updating using experimental data has matured from attempts to directly calibrate system matrix coefficients until today's semi-automatic iterative techniques. State-of-the-art approaches provide the flexibility that is needed to update virtually any input parameter, at either a local or a global level. Despite the large number of contributors to the research, only few commercial implementations have emerged that combine all necessary supporting tools and enable interaction with standard solvers. In this presentation, the entire model updating process is reviewed and some successful methodologies are highlighted. Based on the author's own experiences over the past 20 years, a number of practical solutions are presented that allowed to remove past barriers, increase user productivity and widen the field of application. The paper concludes with current trends and an outlook to the future of the technology.

[1]  G. G. Stokes "J." , 1890, The New Yale Book of Quotations.

[2]  Jon D. Collins,et al.  Statistical Identification of Structures , 1973 .

[3]  Miss A.O. Penney (b) , 1974, The New Yale Book of Quotations.

[4]  Randall J. Allemang,et al.  A Correlation Coefficient for Modal Vector Analysis , 1982 .

[5]  M. Imregun,et al.  A review of model updating techniques , 1991 .

[6]  John E. Mottershead,et al.  Model Updating In Structural Dynamics: A Survey , 1993 .

[7]  T. K. Kundra,et al.  Comparative study of model updating methods using simulated experimental data , 2002 .

[8]  Peter Avitabile,et al.  Twenty years of structural dynamic modification: A review , 2002 .

[9]  Tom Lauwagie,et al.  Layered material identification using multi-model uptdating , 2002 .

[10]  Eddy Dascotte,et al.  The Use of FE Model Updating and Probabilistic Analysis for Dealing with Uncertainty in Structural Dynamics Simulation , 2003 .

[11]  F. Wetenschappen Identification of the material properties of slender composite structures , 2004 .

[12]  E. Dascotte Identification of Random Material Properties using a Mixed Deterministic-Probabilistic Method 1 , 2004 .

[13]  T. Lauwagie Vibration-Based Methods for the Identification of the Elastic Properties of Layered Materials (Trillingsgebaseerde methodes voor de identificatie van de elastische eigenschappen van gelaagde materialen) , 2005 .

[14]  Randall J. Allemang,et al.  The Modern Era of Experimental Modal Analysis One Historical Perspective , 2007 .