Improved component mode synthesis method using experimental obtained modal data

실험모달데이터를 사용한 구분모두 합성법의 개선

  • 장경진 (연세대학교 대학원,기계공학과) ;
  • 지태한 (연세대학교 대학원,기계공학과) ;
  • 박영필 (연세대학교 공과대학,기계공학과)
  • Published : 1996.02.01

Abstract

This paper presents systematic study of the experimental application of a free-interfaced component mode synthesis method. In the free-interfaced component mode synthesis method, an error the to truncated higher modes and neglected ineria loadings on a component from the connected component is inherent. Also, it is difficult to directly use experimental modal data in a modal synthesis method which links experimental model to finite-element model because of many inconsistencies between experimentally obtained and analytically obtained modal vectors and missing degrees-of-freedom (DOFs) such as rotational DOFs. In order to solve these problems, three methods, the first one based on attaching auxiliary weights to the connection points, the second one utillizing the normalization of experimental modal vector, and the third one generating smoothed and expanded experimental mode shapes, are studied in this paper. Finally, the study is illustrated for a flat-plate structure by using simulated and measured experimental data.

Keywords

References

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