浅海环境不确定性对声场扰动的影响

发布时间：2018-06-06 17:15

本文选题：海洋环境不确定性 + 声场扰动　；参考：《声学技术》2017年04期

【摘要】：探索海洋环境各水声参数的不确定性所引发的声场扰动,对提高水声场预报的准确性与科学性至关重要,极具理论意义与应用价值。基于Workshop’97浅海环境基准模型,以扰动声场与实际声场的相关性函数作为量化指标,通过Kraken波动理论数值模型与马尔科夫链蒙特卡罗随机统计思想,基于单因子变量原则模拟分析了浅海水平不变环境中各水声参数声场扰动敏感性大小及其相关性,结果表明:沉积层声速C_1、水深D_1敏感性最强,沉积层衰减系数αs、沉积层密度ρs、沉积层声速C_2、沉积层厚度D_2、基底声速C_3次之,基底衰减系数αb、基底密度ρb几乎无影响;αs、ρs、C_1、D_1敏感性随距离增加逐渐增强,C_2、D_2、C_3敏感性随距离增加逐渐减弱;D_2、C_2,D_2、C_3,C_1、C_3,C_2、C_3之间存在较强的正相关性,D_2、C_1,C_1、C_2之间为显著的负相关性。
[Abstract]:It is very important to explore the disturbance of acoustic field caused by the uncertainty of underwater acoustic parameters in marine environment to improve the accuracy and scientificity of underwater acoustic field prediction, which is of great theoretical significance and application value. Based on the Workshop-97 shallow water environmental datum model, the correlation function between disturbed sound field and actual sound field is taken as the quantitative index, and the Kraken wave theory numerical model and Markov chain Monte Carlo stochastic statistical thought are adopted. Based on the principle of single factor variable, the sensitivity of acoustic field disturbance of acoustic parameters in shallow sea and its correlation are simulated and analyzed. The results show that the acoustic velocity of sediment layer C _ 1 and the depth of water D _ 1 are the most sensitive. The attenuation coefficient 伪 s, the density 蟻 s, the sonic velocity C _ 2, the thickness D _ 2, the sound velocity C _ T _ 3 of the substrate, The sensitivity of D _ 2C _ 1 / C _ 2C _ 2C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) to C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (1) C _ (
【作者单位】：海军海洋测绘研究所;
【基金】：国家自然科学基金资助项目(41276088) 国家海洋公益性行业科研项目(2012050007-7)
【分类号】：P733.2

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