摘要
通过一种自适应时频分析方法获取浅海简正波信号的群延迟数据,与简正波群延迟特性相匹配,从而实现了在单水听器信号基础上进行海底声速、密度等参数的反演。利用反演参数计算得到的1-4号简正波群速度与通过时频分析得到的实验结果符合的很好,对于海水深度、沉积层深度、声速、密度等参数给出了可靠的反演结果,实验数据处理结果表明这是一种简单、快速而有效的参数反演方法。
The group delays of normal modes in shallow water are obtained by an adaptive time-frequency analysis. The bottom sound velocity and density are inverted based on single hydrophone by matching the group delays of normal modes. Group speeds of mode 1～4 for the inverted parameters provide an excellent match to the experimental data obtained from time-frequency analysis, several inverted parameters include the depth of the water, the depth, density and sound speed of the deposit are reliable, and the processed results indicate that it is a simple, fast and effective approach for geoacoustic inversion.
出处
《声学学报》
EI
CSCD
北大核心
2005年第5期415-419,共5页
Acta Acustica
基金
国家自然科学基金资助项目(10474112)
