Implementations with generalized finite differences of the displacements and velocity-stress formulations of seismic wave propagation problem

摘要

This paper shows the displacements and velocity-stress formulations for the wave propagation problem with the aim of comparing its effectivity when they are implemented with the Generalized Finite Difference Method (GFDM). Schemes in GFD with approximations of the second and fourth order have been used and absorbing boundaries have been simulated with perfectly matched layers. The results obtained using both formulations are compared by using several examples in 2-D. The influence of the type of discretization of the clouds of nodes (regular and irregular) is studied.