Calculation of the scattering coefficient of sound diffusers using an improved boundary meshless method

Haitao Wang, Shenggang Yan, Xiangyang Zeng, Kean Chen

科研成果: 书/报告/会议事项章节会议稿件同行评审

摘要

This paper develops an improved boundary meshless method combining the boundary integral equation approach and the meshless method to predict the scattering coefficients. It is applicable to the finite surface with arbitrarily shaped profile. Compared with the traditional BEM, the improved method gives a different simulation model where the diffuser is considered to be attached on an infinite rigid baffle. Based on the model, the integral equation which has unique solution for all frequencies is derived. The solid angle which closely relates with the shape of the diffuser is also involved in the integral equation to give more complete simulation on the geometry of the diffuser. In addition, the system equation for calculating the sound pressure is solved using meshless method, which is beneficial to improve the accuracy on simulating the curved surface. Numerical verifications demonstrate that the improved method is valid for calculating the directional scattering coefficient. Especially, the improved method has better accuracy on simulations for grazing incident waves than the traditional method. The effectiveness of the improved method in calculating the random-incidence scattering coefficient is also validated, where the improved method gives closer results with the measurement than the traditional method.

源语言英语
主期刊名ICSV 2016 - 23rd International Congress on Sound and Vibration
主期刊副标题From Ancient to Modern Acoustics
出版商International Institute of Acoustics and Vibrations
ISBN(电子版)9789609922623
出版状态已出版 - 2016
活动23rd International Congress on Sound and Vibration, ICSV 2016 - Athens, 希腊
期限: 10 7月 201614 7月 2016

出版系列

姓名ICSV 2016 - 23rd International Congress on Sound and Vibration: From Ancient to Modern Acoustics

会议

会议23rd International Congress on Sound and Vibration, ICSV 2016
国家/地区希腊
Athens
时期10/07/1614/07/16

指纹

探究 'Calculation of the scattering coefficient of sound diffusers using an improved boundary meshless method' 的科研主题。它们共同构成独一无二的指纹。

引用此