Energy-conserving local time stepping based on high-order finite elements for seismic wave propagation across a fluid-solid interface

摘要: When studying seismic wave propagation in fluid-solid models based on a numerical technique the time domain with an explicit scheme it is often of interest to resort substepping because stability condition solid part medium can be more stringent than fluid. In such case, one should enforce conservation energy along interface matching algorithm order ensure accuracy and scheme. This not done available literature approximate techniques that do are used instead. We introduce energy-conserving local stepping method, which we need solve linear system interface. validate experiments performed using high-order finite elements. any other method diagonal mass matrix.