Acoustic topology optimization based on damping structure-acoustic cavity coupling

被引：0
|
作者：
Zou M.-X. [1 ,2 ]
Xia L.-J. [1 ,2 ]
机构：
[1] State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai
[2] Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiao Tong University, Shanghai
来源：
Chuan Bo Li Xue/Journal of Ship Mechanics | 2023年 / 27卷 / 11期
关键词：
damping structure; FEM; moving asymptote method; topology optimization of acoustics;
D O I：
10.3969/j.issn.1007-7294.2023.11.012
中图分类号：
学科分类号：
摘要：
Damping materials can effectively suppress structural vibration and noise. Harmonic response analysis of acoustics was carried out, and the optimal distribution of damping layer was obtained by using topology optimization to minimize sound radiation. With the structure-acoustic system considered as one-way coupling, the complex stiffness method was employed to analyze the damping material. The inner sound pressure and the structural velocity response (the latter was taken as the boundary condition) were calculated by FEM (finite element method) respectively. In the optimal design problem, the design variable was the element density of damping materials as the SIMP approach was employed. The sensitivity of sound pressure was derived and then used by the moving asymptote method for iteratively solving the optimal problem. An acoustic topology optimizer was programmed. A numerical example was employed to illustrate the validity of this approach. The impacts of the aimed frequency, the position of the referred point and the constrained volume fraction were discussed. © 2023 China Ship Scientific Research Center. All rights reserved.
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页码：1707 / 1717
页数：10
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