文献类型：期刊文献

中文题名：Modification to first-order Born approximation for improved prediction of scattered sound from weakly scattering objects

英文题名：Modification to first-order Born approximation for improved prediction of scattered sound from weakly scattering objects

作者：Zhang, Peizhen[1,2]; Wang, Shuozhong[1]; Wang, Runtian[3]; Chen, Yunfei[4]; Wang, Luxian[1]

机构：[1] School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China; [2] School of Information, Guangdong Ocean University, Zhanjiang 524088, China; [3] Shanghai Acoustics Laboratory, Chinese Academy of Sciences, Shanghai 200032, China; [4] Key Laboratory for Underwater Test and Control Technology, Dalian 116013, China

年份：2014

卷号：33

期号：3

起止页码：331

中文期刊名：Chinese Journal of Acoustics

外文期刊名：Shengxue Xuebao/Acta Acustica

收录：CSTPCD、、北大核心2011、EI(收录号：20142217763885)、Scopus(收录号：2-s2.0-84901200088)、北大核心、CSCD、CSCD2013_2014

基金：supported by the National Natural Science Foundation of China(61071187);Key Laboratory Foundation for Underwater Test and Control Technology(9140c260201110c26)

语种：英文

中文关键词：Modification to first-order Born approximation for improved prediction of scattered sound from weakly scattering objects

外文关键词：Born approximation - Numerical methods - Acoustic wave scattering

中文摘要：When deriving the Fourier diffraction theorem based on the first-order Born approximation,the difference between wave number of the scattering object and that of the surrounding medium is ignored,causing substantial errors in sound scattering prediction.This paper modifies the Born approximation by taking into account the amplitude and phase changes between the scattering object and the water due to the wave number difference.By changing the radius and center position of the sampling circle in the Fourier domain,accuracy of the predicted sound scattering is improved.With the modified Born approximation,the computed far-field directional pattern of the scattered sound from a circular cylinder is in good agreement with the rigorous solution.Numerical calculations for several objects with different shapes are used to show applicability and effectiveness of the proposed method.

外文摘要：When deriving the Fourier diffraction theorem based on the first-order Born approximation, the difference between wave number of the scattering object and that of the surrounding medium is ignored, causing substantial errors in sound scattering prediction. This paper modifies the Born approximation by taking into account the amplitude and phase changes at the interface between the scattering object and the water due to the wave number difference. By changing the radius and center position of the sampling circle in the Fourier domain, accuracy of the predicted sound scattering is improved. With the modified Born approximation, the computed far-field directional pattern of the scattered sound from a circular cylinder is in good agreement with the rigorous solution. Numerical calculations for several objects with different shapes are used to show applicability and effectiveness of the proposed method.