摘要
针对典型浅海海洋环境下的低频声传播问题,以快速场方法为建模手段,以声能流为研究对象,结合具体算例模拟研究了不同浅海环境参数对低频声信号传播特性的影响规律.研究结果表明:矢量场中质点垂直振速传播衰减远大于同点声压与水平振速传播损失;海洋环境参数、声源参数、海底声学参数均对低频声信号传播具有重要影响,其中又以海底声速对声能量传播特性的影响最为显著.
Targeted at the issue of low-frequency acoustic propagation in typical shallow water environment,and based on specific example simulation,the research of the influence law of different ocean environment parameters on the acoustic signal propagation at low frequency is performed through taking fast field method（FFM）as the modeling approach and acoustic energy flow as the research subject.The results have been proved that the transmission loss of vertical particle velocity is larger than that of pressure and horizontal particle velocity.Ocean environment parameters,sound source parameters and geo acoustic parameters all have important effects on acoustic signal propagation at low frequency,and the sound velocity in ocean bottom exerts the most significant influence.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2017年第12期1464-1472,共9页
Journal of Shanghai Jiaotong University
基金
海洋科学浙江省重中之重学科开放课题(20160103)
水产浙江省一流学科开放课题(20160004)
浙江海洋学院科研启动金项目(21105013415)资助
关键词
浅海Pekeris波导
低频声信号
快速场方法
声传播
声能流
Pekeris waveguide in shallow water~ low frequency acoustic signal
fast field method （FFM）
acoustic propagation
acoustic energy flux
