【摘要】 海水中的声速剖面对声传播有比较重要的影响.利用海上实验的实际数据由声信号的传播时间反演海水中的声速剖面.用经验正交函数表示声速剖面,根据选取的代价函数应用遗传算法搜索最优解.为了提高反演算法的性能,快速反演获得海水中的声速剖面,在射线声学理论下,对传播时间的计算方法进行了改进,有效降低了算法的计算量.利用海上实验的实际数据反演获得的声速剖面与实验时直接测量获得的声速剖面相比较,误差小于2‰.反演结果与实测结果基本相符.更多还原

【Abstract】 The sound speed profile in the ocean has important influence on sound propagation in the medium.The sound speed profile in the ocean was inverted by using travel time.The experimental data were used for the study.The sound speed profile was described by empirical orthogonal functions.A genetic algorithm was used to search the optimum solution.The methods of quickly calculating travel time based on ray theory were developed in order to improve efficiency of inversion algorithm.The experimental data were used to invert sound speed profiles in the experimental sea area.The error of the calculated result was less than 2‰.The calculated result was consistent to the sound speed profile measured.更多还原