摘要
以严格求解波动方程反演海底声学参数分布的方法一般不适用于声阻抗变化不连续的情况。而射线近似方法不受此限制。在某些实际场合中射线方法已得到令人满意的反演结果。 本文介绍一种以传播时间为尺度的等层厚细密分层海底的散射求逆方法。反演程序具有判断是否存在多次散射并消除其影响的能力。初步解决由于多次散射而产生的虚假界面和在虚界面之后带来的计算误差问题。
The inverse method to infer the profiles of acoustical parameters under the sea-bottom from exact solutions of the wave equation is generally not applicable to the situation where discontinuity exists in the acoustical impedance profile[1]. However, the ray approximation is still effective, and satisfactory results have been obtained under some practial circumstances[2,3].
In this paper a scattering inverse method is presented based on the equi-thickness (measured in the propagation time) division of the sub-bottom media. This program is capable of judging the existence of multireflections and eliminating their influence. The problems of the occurence of pseudo-boundaries rising from multi-reflections and computation errors caused by them have been preliminarily solved.
出处
《声学学报》
EI
CSCD
北大核心
1989年第3期190-195,共6页
Acta Acustica
基金
国家自然科学基金项目
