水下移动目标散射场垂直面上分布变化规律

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• 英文论文题名：Scattering direction variation of the underwater target on vertical plane caused by its shift
• 论文作者：马黎黎 ; 王仁乾
• 英文论文作者：MA Li-li ; WANG Ren-qian ; School of Electronics Engineering & Computer Science ; Peking University
• 年：2016
• 作者机构：北京大学信息科学技术学院;
• 论文关键词：水下目标散射场 ; 刚性球 ; 垂直面上散射场分布
• 英文论文关键词：scattering field of underwater target ; rigid sphere ; scattering fields on vertical plane
• 会议召开时间：2016-10-28
• 会议录名称：2016年全国声学学术会议论文集
• 语种：中文
• 分类号：TB566
• 学会代码：OGSM
• 会议名称：2016年全国声学学术会议
• 会议地点：中国湖北武汉
• 主办单位：中国声学学会
• 学会名称：中国声学学会
• 页数：4
• 文件大小：723k
• 原文格式：D
• 会议级别：全国

摘要

探讨均匀浅海中移动目标因位置的变化引起垂直面上散射场分布变化的规律。基于均匀浅海中刚性球散射场公式,数值模拟了:黏土、细砂和花岗岩等不同底质环境中刚性球散射场空间指向性;细砂底质环境中刚性球相对观察点水平移动和垂直移动时,垂直面上散射场的指向性。结果表明:水下目标散射场空间指向性受海底底质影响较大;因界面的影响,垂直面散射场分布扇面随目标与接收器间水平距离的增加而减小,目标沿深度下行,垂直面散射场指向性图中波瓣向海底偏转,并且指向海面的波瓣减小而指向海底的波瓣增大。
The variation of the scattering field on the vertical plane is researched when the underwater rigid sphere moving along vertical or horizontal directions. Based on the expression of the acoustic field scattered by a rigid sphere in the shallow-water, the scattering field on vertical and horizontal planes in the shallow-water with the seabed of being silt, sand and granite are calculated and the scattering field direction variation on the vertical plane caused by the target shift in the shallow-water with sand seabed is also calculated. The results show: the scattering field direction is influenced by the seabed material intensively; the fan plane of the scattering field distributing on the vertical plane is reduced with the horizontal distance between the target and the receiver increasing. When the target moving to the seabed the lobe of the scattering field direction pointing seabed becomes larger and that lobe pointing sea surface becomes lesser.

引文

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