实验测量声辐射模态
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南昌航空大学,瑞士联邦材料科学与技术研究所

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Experimental Measurement of Radiation Modes
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Nanchang HangKong University,Swiss Federal Laboratories for Materials Science and Technology

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    摘要:

    通过实验方法测量得到振动结构的声辐射模态及其辐射效率。首先通过辐射算子分析任意结构的声辐射模态,然后根据互换原理,在远场布置声源,通过测量结构表面声压,得到辐射算子。最后以一平面玻璃板为例进行实验研究,通过互换方法测量了前5阶声辐射模态和对应的辐射效率。实验结果表明通过互换方法测量声辐射模态是可行的。

    Abstract:

    A technique to measure the shapes and corresponding radiation efficiencies of the radiation modes for vibrating structures is proposed. First, the radiation operator is imposed to analyze the radiation mode for arbitrary structures. Then the reciprocal method is imposed to obtain the experimental version of radiation operator. By placing a source with known volume velocity in the far-field and measuring pressure on surface of the structure can obtain the appropriate radiation operator. Final, with an example of a rectangular glass plate, experimental study was carried out to verify the proposed method. The shapes and corresponding radiation efficiencies for the first five radiation modes were measured. The experimental results show the feasibility of the proposed reciprocity method.

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毛崎波,皮耶奇克 S.实验测量声辐射模态[J].振动工程学报,2012,25(3).[MAO QIBO and. Experimental Measurement of Radiation Modes[J]. Journal of Vibration Engineering,2012,25(3).]

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  • 收稿日期:2011-09-13
  • 最后修改日期:2012-05-25
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  • 在线发布日期: 2012-06-12
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