A Study on the Performance of Absorbing Boundaries for Wave propagation Using Finite Element Method

유한요소법에서의 파진행 문제를 위한 흡수경계 성능에 관한 연구

In this paper an analytical study is carried out to examine the effectiveness of absorbing boundaries using dashpot. Validity of the absorbing boundary conditions suggested by Lysmer-Kuhlemeyer and White et al. is investigated by adopting the solution of Miller and Pursey. The Miller and Pursey's problem is then numerically simulated using the finite element method. The absorption ratios are calculated by comparing the displacements at the absorbing boundary to those at the free field without the absorbing boundary. The numerical verification is carried out through comparison of displacement at the boundary.