【摘要】 研究了半空间内弹性波强散射源的逆问题 ,利用矩量法进行离散处理 ,并利用正则化原则避免求解病态矩阵方程 ,基于DBI(Distorted BornIterative)方法 ,提出了一种非线性反演算法 .和Born方法不同的是 :该算法在每一步迭代过程中不仅只修正总波场 ,同时也修正格林函数 .数值模拟计算结果证明了本方法的有效性 .更多还原

【Abstract】 The nonlinear elastic wave inversion of strong scatter imbedded in half space was studied. Moment method was used in the discretization procedure and a numerical approach was presented by employing regularization technique and DBI (Distorted Born Iterative) method. This method, unlike the Born iterative method, attempts to correct the Green function as well as the total field at each iteration. The results showed that the approach presented was efficient.更多还原