Sensitivity analysis and optimization of vibration modes in continuum systems

Akihiro Takezawa*, Mitsuru Kitamura

*この研究の対応する著者

研究成果: Article査読

23 被引用数 (Scopus)

抄録

The sensitivity analysis of objective functions including the eigenmodes of continuum systems governed by scalar Helmholtz equations is carried out in continuum form. In addition, based on the sensitivity, the mode shapes are specified through numerical optimization. Using the continuum sensitivity and adjoint equation, the physical nature of them can be analyzed, which helps to explain the nature of the target optimization problem. Moreover, the continuum sensitivity and adjoint equation contribute to the quick numerical implementation of sensitivity analysis using software that can solve an arbitrary partial differential equation directly. A scalar Helmholtz equation in 1D or 2D domain is considered. The sensitivity analysis is performed for the general objective function formulated as a function of the eigenmode in continuum form. A minimization problem using the least squared error (i.e., difference) between the eigenvector and target mode shape is set as a sample objective function for both the first and second eigenmodes. The sensitivity and the adjoint equation are derived for this objective function. 1D and 2D numerical sensitivity analysis and optimization examples are studied to illustrate the validity of the derived sensitivity.

本文言語English
ページ(範囲)1553-1566
ページ数14
ジャーナルJournal of Sound and Vibration
332
6
DOI
出版ステータスPublished - 2013 3月 18
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学
  • 材料力学
  • 音響学および超音波学
  • 機械工学

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