时域局部透射边界的计算飘移失稳

本文通过对时域局部透射边界特性及应用结果分析，发现了多次透射边界的一种非高频振荡失稳的失稳性，并就此给出了人工边界的计算飘移失稳的概念．文中对多次透射边界的计算飘移失稳现象及失稳机制作了分析，探讨了飘移失稳发生的条件，提出了一种简单有效的消除飘移失稳的方法

THE DRIFT INSTABILITY OF LOCAL TRANSMITTING BOUNDARY IN TIME DOMAIN

In this paper, an instability of Multi transmitting Boundary differing from the high frequency oscillation instability is discovered based on the analyses of the properties and computing results in application, and the concept of the drift instability of Multi transmitting Boundary is introduced for the first time The drift instability phenomenon and its mechanism are studied, the drift instability condition is discussed, and a simple and effective measure is suggested for eliminating the drift instability