声速剖面反演对基阵倾斜失配的敏感性研究  

Research about sensitivity of array inclination on sound speed profile inversion

作　　者：张维[1] 杨士莪 黄勇[1] 

机构地区：[1]中国船舶重工集团公司第七一○研究所,宜昌443003 [2]哈尔滨工程大学水声技术重点实验室,哈尔滨150001

出　　处：《声学学报》2015年第5期649-654,共6页Acta Acustica

基　　金：国家自然科学基金(11104045);国家安全重大基础研究项目(613110010202)资助

摘　　要：通过推导基阵倾斜失配给声传播时间计算带来的误差,分析了这种参数失配对基于声传播时间的声速剖面反演结果的敏感性。研究结果表明,小角度倾斜时,由基阵倾斜所带来的声速剖面反演误差与倾斜俯仰角近似成正比,与声传播时间近似成反比。当基阵倾斜方位与声源一基阵连线方向一致时带来的误差最大,而垂直时误差最小。理论计算与仿真、实验结果在变化趋势和数量级上具有较好的一致性,为反演误差预报提供了参考。From analyzing the error of sound transmission time induced by inclined array, the sensitivity about mis- match for sound speed profile （SSP） inversion based on sound transmission time is studied. It is indicated that the error of SSP inversion induced by inclined array is proportional to the pitch angle of array and inversely proportional to sound transmission time. The additional error is maximum when the azimuth angle of inclined array is accordant with the line between the source and array. However, while the azimuth angle is vertical with the line the error is minimum. The theoretical result is accordant with simulation and experiment in trends and order of magnitude. So it can provide some references for the prediction of SSP inversion error.

关 键 词：剖面反演 敏感性 基阵 声速 误差预报 失配 时间计算 传播时间 

分 类 号：O422.1[理学—声学]