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利用非线性规划研究的最新成果,设计了一种全新的震源破裂过程的反演方法,同时反演震源破裂的时间图像和滑动在破裂面上的分布.该方法与目前震源过程破裂反演计算所用的两类主要方法(线性矩阵方法和全局搜索寻优方法)相比,在线性矩阵方法对初始模型依赖大、解不稳定和全局搜索寻优方法在高维解空间寻优效率不高、易出现伪解等方面有较显著改善.数字试验的测试表明,本方法计算效率高,反演结果稳定、可靠,可有效应用于实际地震震源过程的反演研究中.
Based on the latest achievements of nonlinear programming, a new inversion method of source rupture process is designed, and simultaneously the time images of source rupture and the distribution of slip on the rupture plane are obtained. This method is compared with the calculation of rupture inversion Compared with the two main methods (linear matrix method and global search optimization method), the linear matrix method is not efficient enough for the initial model to rely on the large, unstable and global search optimization method in the high dimensional solution space, Which is easy to appear pseudo-solution and so on.Digital test shows that this method has high computational efficiency, stable and reliable inversion results and can be effectively applied in the inversion of actual seismic source process.