| 考虑流体加载效应的板结构声辐射损耗因子和辐射效率的计算分析 |
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| 引用本文： | 黎胜.考虑流体加载效应的板结构声辐射损耗因子和辐射效率的计算分析[J].中国舰船研究,2010,5(2):9-12,17. |
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| 作者姓名： | 黎胜 |
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| 作者单位： | 大连理工大学工业装备结构分析国家重点实验室,辽宁大连116024;大连理工大学船舶工程学院,辽宁大连116024 |
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| 基金项目： | 辽宁省自然科学基金资助项目(20082170);;教育部留学回国人员科研启动基金资助项目 |
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| 摘 要： | 采用有限元法和Rayleigh积分耦合方法对考虑流体加载效应的板的结构声辐射损耗因子和声辐射效率进行了计算分析,其中结构振动模态的声辐射损耗因子和声辐射效率分别基于模型降阶的结构模态参数识别方法和考虑流体附加质量的实模态进行计算。对板在空气和水中的声辐射损耗因子和辐射效率进行了计算,计算结果表明：板的奇奇振动模态的声辐射损耗因子远大于其他类型模态;板奇奇振动模态在空气中的声辐射损耗因子远小于水中的声辐射损耗因子,约差一个数量级;板在水中的声辐射损耗因子远大于板的结构损耗因子,空气的声辐射损耗因子与结构损耗因子相当;空气中的声辐射效率比水中的声辐射效率约高两个数量级。
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| 关 键 词： | 流体加载效应 声辐射 损耗因子 辐射效率 |
Analysis of Structural Acoustic Radiation Loss Factor and Radiation Efficiency of a Plate Under Fluid Loading |
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| Li Sheng.Analysis of Structural Acoustic Radiation Loss Factor and Radiation Efficiency of a Plate Under Fluid Loading[J].Chinese Journal of Ship Research,2010,5(2):9-12,17. |
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| Authors: | Li Sheng |
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| Institution: | Li Sheng( 1 State Key Laboratory of Structural Analysis for Industrial Equipment,Dalian University of Technology,Dalian 116024,China ;2 School of Naval Architecture,Dalian University of Technology,Dalian 116024,China ) |
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| Abstract: | The structural acoustic radiation loss factor and radiation efficiency of a plate under fluid loading were computerized and analyzed using finite element method and Rayleigh integral coupled method.The finite element method was employed for discretizing the structure.The Rayleigh integral was used for modeling the acoustic fluid.The modal acoustic radiation loss factor and the modal acoustic radiation efficiency were obtained with fluid-loaded undamped normal modes and reduced order models respectively.The ... |
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| Keywords: | fluid loading effects acoustic radiation loss factor radiation efficiency |
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