| 封闭空腔声学特性研究 |
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| 引用本文： | 张琪,张卫红.封闭空腔声学特性研究[J].强度与环境,2008,35(6). |
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| 作者姓名： | 张琪 张卫红 |
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| 作者单位： | 北京强度环境研究所,北京,100076 |
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| 摘 要： | 研究封闭空腔结构在声激励下出现的流固耦合问题,难点和关键点是弄清封闭空腔的声学特性。建立封闭空腔的有限元模型,根据空气的物理特性和空气中的音速,计算得到封闭空腔的声学固有频率;试验采用点声源装置、随机信号激励,采集时域数据进行功率谱分析,由频谱图得到共振频率,即封闭空腔的声学固有频率。比较并分析试验值与计算值,二者相吻合,对于轴向声学频率,有限元计算相对准确。
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| 关 键 词： | 有限元分析 封闭空腔声学特性 随机信号 |
Research about enclosure cavum acoustic characteristics |
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| ZHANG Qi,ZHANG Wei-hong.Research about enclosure cavum acoustic characteristics[J].Structure & Environment Engineering,2008,35(6). |
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| Authors: | ZHANG Qi ZHANG Wei-hong |
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| Institution: | ZHANG Qi ZHANG Wei-hong(Beijing Institute of Structure , Environment Engineering,Beijing 100076,China) |
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| Abstract: | Researching structural hydro-solid problems for structures with enclosure under acoustic excitation,the difficult key is studying the enclosure acoustic characteristics.Building Finite Element model of the enclosure,based on the aerial physical property and velocity of sound,acoustic normal frequency was calculated with FEM.Spot acoustic device and exciting of random signals were used to test the enclosure acoustic characteristics.Throughput data of acoustic response were analyzed to get figure of Power Spe... |
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| Keywords: | finite element method the enclosure acoustic characteristics random signals |
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