VIBRO-ACOUSTIC DESIGN BASED ON MICROSTRUCTURE TOPOLOGY OPTIMIZATION
Topological design of the periodic microstructure with respect to minimization of the total sound power radiation from the boundaries of the macrostructure is studied in the present paper.The macrostructure is excited at a single or a band of excitation frequencies by a time-harmonic external mechanical loading with prescribed amplitude and spatial distribution.The structural damping is considered to be Rayleigh damping.The microstructure composed of two different solid isotropic material phases is assumed to be identical from point to point at the macro level, which implies that the interface between the structure and the acoustic medium will not change during the design process.The upper limit of the volume fraction of the strong material is given.A high frequency approximation model is employed to implement calculation of the sound power and the corresponding sensitivity analysis.The proposed methods are validated by several numerical examples concerning single and multiple frequency optimization problems.
Vibro-acoustic design Microstructure topology optimization Homogenization Bi-material interpolation Sound power flow
Ruizhen Yang Jianbin Du
School of Aerospace,Tsinghua University,100084,Beijing,China
国际会议
黄山
英文
1-6
2012-06-18（万方平台首次上网日期，不代表论文的发表时间）