WIT Press


Verification And Adjustment Of Dynamic Structural Finite Element Models By Experimental Model Analysis Data

Price

Free (open access)

Paper DOI

10.2495/CMEM950751

Volume

12

Pages

8

Published

1995

Size

784 kb

Author(s)

M. Zehn, F. Wahl & G. Schmidt

Abstract

The adjustment of structural dynamic model (finite element method, FEM) using experimental data (experimental modal analysis, EMA) is a difficult and time consuming task, especially for real engi- neering structures with a large number of degrees of freedom. Both measurement and calculation in- clude subjective and objective errors. Therefore verification is first what have to be done. One cannot employ one method alone, even well known methods like MAC, COMAC, etc., can fail and indicate good model coincidence wrongly. FEM and measurement model are not unique because of incom- pleteness in modal space. The model correction method presented in the paper is mainly focused on large FE models and has been tested in the commercial FE code COSAR. 1 Introduc

Keywords