| 考虑声振耦合下结构阻尼板降噪拓扑优化设计 |
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| 引用本文： | 李鸿秋,陈国平,张保强.考虑声振耦合下结构阻尼板降噪拓扑优化设计[J].振动．测试与诊断,2011,31(5):586-590. |
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| 作者姓名： | 李鸿秋 陈国平 张保强 |
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| 作者单位： | 1. 南京航空航天大学机械结构强度与振动国家重点实验室,南京,210016;金陵科技学院机电工程学院,南京,211169
2. 南京航空航天大学机械结构强度与振动国家重点实验室,南京,210016 |
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| 基金项目： | 国家高技术研究发展计划(“八六三”计划)资助项目，南京航空航天大学基本科研业务费专项科研基金资助项目 |
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| 摘 要： | 弹性板-声腔系统声振耦合研究不仅要计算结构-声场耦合的频率以及振型,还要计算耦合后系统对设计变量的灵敏度.本文采用伴随法得到弹性板上节点位移对阻尼层单元的灵敏度,并使用变密度优化方法对阻尼材料敷设位置予以优化.同时,引入Sigmund提出的过滤公式,抑制优化过程中出现的棋盘格现象.分析表明,敷贴约束阻尼层后控制点位置的声压明显减低.与均匀敷贴阻尼相比,阻尼材料敷设位置优化后的结构能有效地抑制声腔内控制点的声压级和减轻结构重量.
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| 关 键 词： | 声振耦合 降噪 约束阻尼板 拓扑优化 |
Topology Optimization Design of Constrained Layer Damping Plate-Cavity System Considering Vibro-acoustic Coupling |
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| Li Hongqiu,Chen Guoping,Zhang Baoqiang.Topology Optimization Design of Constrained Layer Damping Plate-Cavity System Considering Vibro-acoustic Coupling[J].Journal of Vibration,Measurement & Diagnosis,2011,31(5):586-590. |
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| Authors: | Li Hongqiu Chen Guoping Zhang Baoqiang |
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| Affiliation: | Li Hongqiu1,2,Chen Guoping1,Zhang Baoqiang1(1State Key Laboratory of Mechanics and Control for Mechanical Structures,Nanjing University of Aeronautics and Astronautics Nanjing,210016,China)(2College of Mechanical and Electrical Engineering,Jinling Institute of Technology Nanjing,211169,China) |
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| Abstract: | Laplace transform is utilized to solve the coupled equation of plate and acoustic cavity and analysis sensitivity of the vibro-acoustic system.The sensitivity of the displacement amplitude with respect to size and shape design parameters for the coupled system is derived.Research on vibro-acoustic coupling system includes computation of the coupling frequencies and coupling modes,and sensitivities of the coupling system to design variables.The reducing displacement amplitude of the specified nodes on the pl... |
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| Keywords: | vibro-acoustic coupling noise reduction constrained layer damping plate topology optimization |
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