| 结构声辐射边界元声学灵敏度研究 |
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| 引用本文： | 张军,兆文忠.结构声辐射边界元声学灵敏度研究[J].大连铁道学院学报,2005,26(3):12-15. |
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| 作者姓名： | 张军 兆文忠 |
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| 作者单位： | 大连交通大学机械工程学院,大连辽宁116028 |
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| 摘 要： | 声学灵敏度反应了结构振动引起的辐射声压与结构表面法向振动速度之间的关系.分析了基于边界元法的结构振动声辐射计算原理,推导了声学敏度.用有限元法计算结构动力学响应,以有限元法计算的结构振动速度为边界条件,基于边界元法计算结构振动幅射的声压及声压对振动速度的灵敏度.以一六面体的振动为研究实例,得到了其振动的外场声压及其对结构振动法向速度的灵敏度.结果表明声学灵敏度只与结构几何形状及设计域点的位置有关.
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| 关 键 词： | 灵敏度 边界元法 声辐射 声压级 |
| 文章编号： | 1000-1670（2005）03-0012-04 |
| 收稿时间： | 2005-03-04 |
Acoustic Sensitivity Study of Structure Acoustic Radiation Baed on BEM Method |
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| ZHANG Jun, ZHAO Wen-zhong.Acoustic Sensitivity Study of Structure Acoustic Radiation Baed on BEM Method[J].Journal of Dalian Railway Institute,2005,26(3):12-15. |
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| Authors: | ZHANG Jun ZHAO Wen-zhong |
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| Institution: | School of Mechanical Engineering, Dalian JiaoTong University, Dalian 116028, China |
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| Abstract: | Acoustic sensitivity method is developed to perform sensitivity analysis of sound pressure with respect to structure vibration velocity. BEM analysis method and acoustic sensitivity are deduced. Structure dynamic response is calculated by using FEM method, and the vibration velocity achieved in FEM is applied as boundary condition in BEM, the response sound pressure and acoustic sensitivity are calculated by BEM method. The validity of this method is demonstrated through the examples of radiation box. |
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| Keywords: | sensitivity BEM method acoustic radiate sound pressure level |
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