摘要
研究了界面附近非刚性目标的高频回波特性,给出了相应的计算形态函数和目标强度的Kirchhoff近似公式。计算对比了界面上非刚性和刚性球形目标以及自由空间中的刚性球形目标的形态函数和目标强度,结果表明:由于界面导致的附加回波的干涉影响,界面附近目标的回波幅值变大且起伏特性明显。界面附近目标采用吸声材料或透声材料后,将降低界面引入的附加回波的干扰,有利于沉底目标的隐身。
High-frequent echo characteristics from non-rigid targets near an interface are studied. Kirchhoff approximate expression is derived for calculating the form function or target strength. The form function and target strength of non-rigid and rigid spherical objects are calculated and compared to the rigid spherical obiect＇s in free space. The results show that the echo strength is enhanced, and fluctuation characteristics are distinct because of the added influences caused by interface. If sound absorption materials or materials transparent to sound are used by objects near an interface, the interference of additional echo will be reduced and be propitious to the stealth of bottom objects.
出处
《探测与控制学报》
CSCD
北大核心
2008年第1期66-69,共4页
Journal of Detection & Control
基金
国防预研项目资助(2010301010101)
关键词
高频回波特性
非刚性目标
界面
high-frequent echo characteristics
non-rigid targets
interface
