| A prediction of the acoustic field of a vibrating box by FEM-BEM |
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| 作者姓名： | YU Xingzhuo FANG Xing and ZHOU Yu |
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| 摘 要： | I.Mathematicalmodelofacousticfie1dByapplyingtheSommerfeldradiationcondihonThus,anacousticfic1disdescribcdbyHelmholtzformula.Byconsideringaficldpointinthearea,Helmholtzformulaisgivenbythefollowingthreeintegra1equations:(1)Theexternalintcgra1fOrmu1a'(2)Thcintcrnalintegralformu1af(3)Thesurfaceintegralformu1afwhcreP.isthesoundpressureonthcSsurface;rthedistancefrompointqtothee1ementsurfacedSiqtheficldpoint,tuthefrcqucncyoftheacousticradiation;pthedensityofthesurroundingmedium,vsthenormalvibrati…
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A prediction of the acoustic field of a vibrating box by FEM-BEM |
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| Authors: | YU Xingzhuo FANG Xing and ZHOU Yu |
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| Institution: | Department of Mechanical Engtheering I. Huazhong University of Science and Technology. Wuhan 430074 |
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| Abstract: | A method based on Holmholtz equation is presented to predict thc acoustic radiation of a vibrating box by combining the finite clement method (FEM) with boundary element method (BEM). The prediction formulation is valid for all frequencies if an extra equation is added. The acoustic field of a vibrating box has been calculated and measured. The effectiveness of the method has been proved by test results. |
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| Keywords: | Acoustic radiation Noise prediction Integral equation Finite element method Boundary element method |
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