廖氏吸收边界条件稳定性的改进  

Method of Improving Stability of Liao's Absorbing Boundary Condition

作　　者：张雷[1] 余同彬[2] 赵妍卉[2] 田军[3] 

机构地区：[1]解放军理工大学通信工程学院研究生3队 [2]解放军理工大学通信工程学院 [3]中国人民解放军71625部队

出　　处：《军事通信技术》2012年第4期6-9,25,共5页Journal of Military Communications Technology

摘　　要：廖氏吸收边界条件具有吸收效果好、编程易实现、无需分裂场量的优点,但其数值计算稳定性不佳,无法运用到需要进行长时间迭代的数值计算中去,这极大地限制了其运用范围。文章针对廖氏吸收边界条件数值计算稳定性问题,提出了一种基于加权思想的改进其稳定性的方法,这种方法和以往方法相比,实现起来非常简单,在保证廖氏吸收边界条件良好吸收效果的同时,改善了其稳定性,扩展了高阶廖氏吸收边界条件的运用范围。Liao＇s Absorbing Boundary Condition（ABC） has the advantages of better absorbent effect, easy programming and unnecessary to split field. But its numerical stability is poor, so it cannot be applied to long time step iterative numerical calculation, which greatly limits the scope of its application. To solve this problem, a weighting method for improving the sta-bility of Liao＇s ABC was presented. The method is very simple and effective, and can be implemented easily compared with other methods. It improves the stability of Liao＇s higher order ABC effectively, keeps its excellent absorption, and extends the applying range of Liao＇s higher order ABC.

关 键 词：廖氏吸收边界条件 稳定性 时域有限差分法 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]