Forward modelling of elastic wave equation with coarse-grained parallel algorithm
弹性波方程正演的粗粒度并行算法

Wave equation forward modelling plays a significant role in seismic data acquisition, processing, interpretation and inversion. At present, however, forward modelling algorithms based on the seismic wave-equation are restrained in large-scale industrial application because of their massive computational cost. This article studies the basic methods for solving the 2D elastic wave-equation with finite difference and parallel algorithms, and gives the computation domain division method and communication scheme that are suitable for the parallel algorithm. Also, the article analyzes the difference of the computation time cost, the speedup ratio and efficiency of the parallel programs under different parameters. Numerical experiments realized the parallel solution of elastic wave-equation with Message Passing Interface (MPI), and show that the introduction of MPI greatly improves the computation efficiency.