平坦海底界面上圆形平板的高频回声特性  

The Study of High-frequent Echo Characteristics of Disk on Flat Sea Floor

作　　者：文钢[1] 玄兆林[1] 张晓兵[1] 

机构地区：[1]海军工程大学兵器工程系,武汉430033

出　　处：《武汉理工大学学报（交通科学与工程版）》2008年第6期1075-1078,共4页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：国防预研项目资助(批准号:2010301010101)

摘　　要：用物理声学方法(Kirchhoff近似)结合镜像原理给出了计算界面附近目标声反射的方法.研究了泥砂类沉积物构成的平坦海底界面上不同倾斜角度的刚性圆形平板某一面在不同入射掠射角的高频回声特性.计算中考虑了圆形平板在某些倾斜角度存在的遮挡影响.结果表明,圆形平板垂直于海底界面时,在大部分掠射角范围内的目标强度最大.若要减小回波强度,则圆形平板应倾斜放置.The method for evaluation to acoustic scattering from object near an mtertace has provided based on Kirchhoff approximation combined with image theory. In this article, the high-frequent echo characteristics in different grazing angle of rigid disk laying slantwise on flat sea floor composing by dirty sand have been studied. The shadowing effect has been considered in some tilting conditions of rigid disk. The results show that the target strength is maximum in most grazing angles when rigid disk is normal to flat sea floor. If we want to decrease the target strength, rigid disk should be inclined to flat sea floor.

关 键 词：Kirehhoff近似 镜像原理 目标强度 海底界面 

分 类 号：U666.7[交通运输工程—船舶及航道工程] TV698.11[交通运输工程—船舶与海洋工程]