Design sensitivity analysis for sequential structural-acoustic problems

Nam H. Kim, Jun Dong, Kyung K. Choi, N. Vlahopoulos, Z. D. Ma, M. P. Castanier, C. Pierre

Research output: Contribution to journalArticlepeer-review

67 Scopus citations

Abstract

A design sensitivity analysis of a sequential structural-acoustic problem is presented in which structural and acoustic behaviors are de-coupled. A frequency-response analysis is used to obtain the dynamic behavior of an automotive structure, while the boundary element method is used to solve the pressure response of an interior, acoustic domain. For the purposes of design sensitivity analysis, a direct differentiation method and an adjoint variable method are presented. In the adjoint variable method, an adjoint load is obtained from the acoustic boundary element re-analysis, while the adjoint solution is calculated from the structural dynamic re-analysis. The evaluation of pressure sensitivity only involves a numerical integration process for the structural part. The proposed sensitivity results are compared to finite difference sensitivity results with excellent agreement.

Original languageEnglish
Pages (from-to)569-591
Number of pages23
JournalJournal of Sound and Vibration
Volume263
Issue number3
DOIs
StatePublished - 5 Jun 2003

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