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Updating of a Finite Element Model with a Damping Effect Using Frequency Response Functions

주파수응답함수를 이용한 감쇠가 있는 유한요소모형의 개선

  • 이건명 (경상대학교 수송기계공학부) ;
  • 이형석 (경상대학교 대학원 기계공학과) ;
  • 이한희 (경상대학교 대학원 기계공학과)
  • Published : 2002.05.01

Abstract

The finite element analysis is frequently used to predict dynamic responses of complex structures. Since the predicted responses often differ from experimentally measured ones, updating of the finite element models is performed to make the finite element results agree with the measured ones. Among several model updating methods, one is to use FRF(frequency response function) data without a modal analysis. This paper investigates characteristics of the model updating method in order to improve the method. The investigation is focused on how to obtain FRFs for unmeasured rotational displacements and how to consider damping. For the investigation simulated data and experimental data for a cantilever beam are used.

Keywords

Model Updating;Finite Element Model;Frequency response Function;Rotational Displacement;Interpolation

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