摘要
海底混响是主动声纳的重要背景干扰.研究混响的主要目的之一是得到混响干扰背景下主动声纳方程中的混响强度参数.应用射线声学理论研究了收发合置和分置两种情况下,倾斜海底的近程混响平均强度衰减特性;并且结合湖上实验数据的处理及分析,讨论了海水中声速分布、海底散射特性、海底倾斜角和海水中声速跃变层等因素对混响平均强度衰减特性的影响.数值计算以及实验结果表明:对浅海近程混响强度衰减规律影响最大的是海底散射特性;影响较小的是海底倾斜角.
As boundary reverberation from ocean floor is the main interference with active sonar systems in shallow water,and reverberation intensity is a basic parameter of interest in the corresponding sonar equation. Intensity of short range reverberation from bottom in shallow water has been discussed for both monostatic and bistatic cases.By processing and analyzing experimental data collected from a lake trail, the influence of such factors as the sound velocity profile in water layer, angular distribution function of bottom scattering, incline angle of ocean bottom, and thermocline on reverberation intensity has also been discussed. The numerical results and experimental data show that the influence of bottom incline angle is weak while that of scattering angular function is more prominent.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
2002年第6期4-8,15,共6页
Journal of Harbin Engineering University
关键词
海洋混响
平均强度
衰减规律
oceanic reverberation
average intensity
decaying rule
