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ARTICLE

Prediction of High-frequency Vibro-acoustic Coupling in Anechoic Chamber Using Energy Finite Element Method and Energy Boundary Element Method

Miaoxia Xie¹, Yueming Li¹, Hualing Chen^1,2

1 State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, P.R. China
2 Institute of Vibration and Noise Control, School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, P.R. China

Computer Modeling in Engineering & Sciences 2012, 85(1), 65-78. https://doi.org/10.3970/cmes.2012.085.065

Abstract

Energy finite element method(EFEM) is a promising method to solve high-frequency vibro-acoustic problem. Energy boundary element method (EBEM) is an effective way to compute high-frequency sound radiation in the unbounded medium. Vibro-acoustic coupling of cavity structure in anechoic chamber includes both the interior acoustic field and unbounded exterior acoustic field. In order to predict this kind of high-frequency vibro-acoustic coupling problem in anechoic chamber, an approach combined EFEM and EBEM is developed in this paper. As a numerical example, the approach is applied to solve the high-frequency vibro-acoustic coupling response of a cubic cavity structure excited by a point sound source in an anechoic chamber. The result shows the approach is of the feasibility.

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Keywords

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