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Sensitivity Analysis of Engine Mount System using FRF-based Substructuring Method
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 Title & Authors
Sensitivity Analysis of Engine Mount System using FRF-based Substructuring Method
Lee, Du-Ho; Hwang, U-Seok; Kim, Chan-Muk;
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A general procedure for the design sensitivity analysis of structural dynamic problems has been presented in frame of the FRF-based substructuring formulation. For a system response function, the proposed method gives a parametric design sensitivity formula in terms of the partial derivatives of the connection element properties and the transfer matrix of the subsystems. The derived design sensitivity formula is applied to an engine mount system. An interior noise problem in the passenger car is analyzed using the FRF-based substructuring method and the proposed formulation is adopted to study the response variations with respect to the dynamic characteristics of the engine mounts and the bushes. To obtain the FRFs, a finite element model is built for the engine mount structures, and test data is used for the trimmed body including cabin cavity. The comparison of sensitivities derived by the proposed method and the finite difference method shows that the proposed method is efficient and accurate. The proposed sensitivity analysis method indicates effectively the most sensitive location to the interior noise among the engine mounts and the bushes.
Design Sensitivity Analysis;FRF-based Substructuring Method;Engine Mount System;
 Cited by
부분구조 기반 민감도 해석을 이용한 볼트겹합 구조물의 결합강성 추정,서세영;방극호;김찬묵;이두호;

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