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论文类型：期刊论文

发表时间：2016-06-02

发表刊物：ENGINEERING OPTIMIZATION

收录刊物：SCIE、EI、Scopus

卷号：48

期号：6

页面范围：1060-1079

ISSN号：0305-215X

关键字：adjoint sensitivity analysis; acoustic-structural coupled; optimality criteria; bi-material; topology optimization

摘要：This article investigates topology optimization of a bi-material model for acoustic-structural coupled systems. The design variables are volume fractions of inclusion material in a bi-material model constructed by the microstructure-based design domain method (MDDM). The design objective is the minimization of sound pressure level (SPL) in an interior acoustic medium. Sensitivities of SPL with respect to topological design variables are derived concretely by the adjoint method. A relaxed form of optimality criteria (OC) is developed for solving the acoustic-structural coupled optimization problem to find the optimum bi-material distribution. Based on OC and the adjoint method, a topology optimization method to deal with large calculations in acoustic-structural coupled problems is proposed. Numerical examples are given to illustrate the applications of topology optimization for a bi-material plate under a low single-frequency excitation and an aerospace structure under a low frequency-band excitation, and to prove the efficiency of the adjoint method and the relaxed form of OC.