Sound scattering at fluid-fluid rough surface  

作　　者：YU GaoKun PENG LinHui 

机构地区：[1]Department of Physics,Ocean University of China,Qingdao 266100,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2008年第1期72-81,共10页中国科学：物理学、力学、天文学（英文版）

基　　金：Supported by the National Basic Research Program of China(Grant No.2005CB422307)

摘　　要：Extinction theorem was used to deduce the first order scattering cross-section including the double scattering effects for the fluid-fluid rough surface.If the dou- ble scattering effects are neglected in the present method,the scattering cross-section agrees with the result obtained by the perturbation method based on Rayleigh hypothesis.Calculations of scattering strength were carried out,and comparisons with the first-order perturbation method based on Rayleigh hypothe- sis were also done.The results show that double scattering effects are obvious with the increase of the root mean square of surface height and the grazing angle when the valid condition k1h<1 is satisfied.Extinction theorem was used to deduce the first order scattering cross-section including the double scattering effects for the fluid-fluid rough surface. If the double scattering effects are neglected in the present method, the scattering cross-section agrees with the result obtained by the perturbation method based on Rayleigh hypothesis. Calculations of scattering strength were carried out, and comparisons with the first-order perturbation method based on Rayleigh hypothesis were also done. The results show that double scattering effects are obvious with the increase of the root mean square of surface height and the grazing angle when the valid condition k 1 h < 1 is satisfied.

关 键 词：ROUGH surface SCATTERING CROSS-SECTION EXTINCTION THEOREM double SCATTERING 

分 类 号：O427[理学—声学]