快速场(FFP)算法反演海底参数研究  

The research for seabed parameters inversion with fast field program(FFP)

作　　者：祝捍皓 朴胜春 张海刚 刘伟 安旭东 

机构地区：[1]哈尔滨工程大学水声技术实验室,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2012年第5期648-652,659,共6页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(50979019);国防科技重点实验室基金资助项目(9140C200103110C20)

摘　　要：针对弹性海底条件下的声传播问题和海底参数反演问题,在Pekeris海洋声场模型的基础上推导了基于快速场(FFP)理论的两层弹性海底声场计算公式,讨论了其传播规律并利用KrakenC进行了验证.其次结合水池条件,采用能够模拟弹性海底海洋环境的声场测量平台进行缩比实验.反演中,采用了实际测得的传播损失与FFP理论计算值相等的代价函数,讨论了其对各海底参数的敏感度,并选用遗传算法对该代价函数进行寻优计算.反演得到的声传播损失与实验中实际测量结果吻合较好,表明所建立的理论模型符合实际声场环境.In considering the problems of sound propagation in the ocean with an elastic bottom and inversion of bottom parameters,first,based on the Pekeris model,the computational formulas for a 2-layered elastic ocean bottom were analyzed with a Fast Field Program（FFP） algorithm.The transmission rules were discussed and also proved by KrakenC＇s result.Secondly,a scaled model experiment was carried out in a laboratory tank which was used to simulate an elastic ocean bottom.The cost function for inversion was used so that the actually measured transmission loss was equal to the calculated result of the FFP.The sensitivity of the cost function to the seabed parameters was discussed.The inversion result of transmission loss agreed well with the measurement result;it verified that the theoretical model corresponds with the actual situation.

关 键 词：FFP建模 缩比实验验证 参数反演 弹性海底 声传播 

分 类 号：O427.1[理学—声学]