地震工程与工程振动（英文版）
地震工程與工程振動（英文版）
지진공정여공정진동（영문판）
EARTHQUAKE ENGINEERING AND ENGINEERING VIBRATION
2010年
3期
385-396
,共12页
plane SH waves%diffraction,semi-circular%cavity%half-space%improved cosine half-range expansion
Diffraction of a two-dimensional (2D) semi-circular cavity in a half-space under incident SH-waves is studied using the classic wave function expansion method with a new de-coupling technique. This so-called "improved cosine half-range expansion" algorithm exhibits an excellent performance in reducing displacement residual errors at two rim points of concern. The governing equations are developed in a manner that minimizes the residues of the boundary conditions. Detailed derivation and analysis procedures as well as truncation of infinite linear governing equations are presented. The semi-circular cavity model presented in this paper, due to its simple profile, is expected to be used in seismic wave propagation studies as a benchmark for examining the accuracies of various analytical or numerical methods for mixed-boundary wave propagation problems.
