【作者】 曹正良； 杜栓平； 王军； 汪素萍；

【Author】 CAO Zhengliang DU Shuanping WANG Jun WANG Suping (Hangzhou Applied Acoustics Research Institute,Hangzhou 310012)

【机构】 杭州应用声学研究所声纳技术国防科技重点实验室；

【摘要】 本文以线性调频(LFM)信号回波特征作为研究重点,在仿真分析弹性球壳的回波及其亮点结构的基础上,分别对湖试水中和海试沉底的两个不同壳体目标进行了亮点结构分析。初步研究和分析结果表明：由宽带 LFM 信号得到的回波亮点结构反映了目标回波中各模式成分,同一实验布设情况下不同脉宽的回波亮点结构基本一致,另外,湖试和海试目标与仿真球壳目标的回波亮点结构有明显差别。更多还原

【Abstract】 The focus of this paper is on characteristics of echo from shell targets irradiated by linear frequency modulation(LFM) signal.Based on simulation of echo scattered by an elastic spherical shell,as well as highlight structure of the echo is analyzed, the highlight structure of two different targets,respectively submerged in a lake and landed on seabed is studied.The simulating results show that highlight structure of target echo is related to the modes of the echo.In addition,the structure of the same experimental target is similar at kinds of pulse width,and there are some differences from each other.更多还原