| 两种模态展开法预测结构辐射声功率时振动传感器数目的要求研究 |
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| 引用本文： | 陶建成,邱小军.两种模态展开法预测结构辐射声功率时振动传感器数目的要求研究[J].应用声学,2009,28(4):283-290. |
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| 作者姓名： | 陶建成 邱小军 |
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| 作者单位： | 近代声学教育部重点实验室南京大学声学研究所,南京,210093 |
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| 基金项目： | 国家自然科学基金，教育部新世纪优秀人才支持计划 |
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| 摘 要： | 在考虑模态幅度估计时采样点数目要求的基础上,比较了使用振动模态展开法和辐射模态展开法预测辐射声功率对速度传感器的数目要求。对于点力激励的小阻尼简支矩形板,发现激励频率低于第一阶本征频率时,使用辐射模态展开法所需的传感器数目较少;而激励频率在本征频率附近时,使用振动模态展开法所需的传感器数目较少。
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| 关 键 词： | 辐射模态 模态展开法 传感器数目 |
Velocity sensor number requirements on using mode decomposition methods for structure borne sound power prediction |
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| TAO Jian-Cheng and QIU Xiao-Jun.Velocity sensor number requirements on using mode decomposition methods for structure borne sound power prediction[J].Applied Acoustics,2009,28(4):283-290. |
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| Authors: | TAO Jian-Cheng and QIU Xiao-Jun |
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| Institution: | TAO Jian-Cheng QIU Xiao-Jun (Key Laboratory of Modern Acoustics and Institute of Acoustics,Nanjing University,Nanjing,210093) |
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| Abstract: | In this communication,by considering the precision of the mode amplitude estimation,the number requirements of velocity sensors are compared between using the vibration mode decomposition method(VMD) and the radiation mode decomposition method (RMD) for sound power prediction.For lowly-damped,baffled simply-supported rectangular plates,it is shown that employing RMD requires fewer sensors at frequencies below the first resonance frequency,while employing VMD at structural resonance frequencies requires fewer sensors those on employing RMD. |
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| Keywords: | Radiation mode Mode decomposition The number of sensors |
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