【作者】 宋延勇； 苏明旭； 蔡小舒； 沈嘉祺； 薛明华；

【Author】 SONG Yanyong,SU Mingxu,CAI Xiaoshu,SHEN Jiaqi,XUE Minghua (Institute of Particle and Two Phase Flow Measurement Technology,University of Shanghai for Sicence & Technology,Shanghai 200093,China)

【机构】 上海理工大学颗粒与两相流测量技术研究所；

【摘要】 本文介绍了计算任意形状颗粒及颗粒系的声散射场的边界元法原理及计算模型,给出了刚性球在平面波入射下的声散射算例,验证了边界元法计算颗粒声散射的正确性.本文还分析了不同大小和间距的两刚性球的复散射场,不同大小和长短轴比的刚性椭球在不同方向平面波入射下的单散射场散射图样.更多还原

【Abstract】 The BEM(Boundary Element Method) is introduced for calculation of the acoustic scattering field from rigid particles.This paper presents the corresponding principle & computation model for scattering of a plane wave by a single particle or multiple particles with arbitrary shapes.To validate the method,acoustic scattering of a plane wave by a rigid sphere with its size varying were calculated by both the BEM and the analytical solution.This paper also presents the multiple scattering patterns for two rigid spheres with their sizes and the space between varying as well as the single scattering patterns for a rigid ellipsoid with its orientation,size & aspect ratio varying.更多还原