瞬态波的开路边条件  

THE OPEN BOUNDARY CONDITION OF TRANSIENT WAVES.

作　　者：邹光远[1] 陈耀松[1] 

机构地区：[1]北京大学力学系

出　　处：《力学学报》1989年第5期522-529,共8页Chinese Journal of Theoretical and Applied Mechanics

摘　　要：对波在无界区域内的传播作数值计算时,本文提出了一种处理开路边条件的方法,它无需在有限的人为边界上指定波的传播方向,即不要求波的传播方向与人为边界垂直或近于垂直,而是根据毗邻的内点和边界点的状态,确定待定边界点的波的传播方向。算例表明,这样的开路边条件能将内区来波很好地吸收而无明显反射,符合辐射条件的要求。This paper suggests a method about the 'open boundary condition' to calculate numerically the wave propagation in an infinite region. With this method it is not necessary to define the direction of wave propagation on the artificial boundary. The direction of wave propagation at undetermined boundary points is defined by directions of the wave propagation at boundary points and neighbouring inner points.The numerical test proves that this open boundary condition can absorb the wave propagation from the inner region without obvious reflection which satisfies the radiation condition.

关 键 词：瞬态 波 开路边条件 人为 边界 

分 类 号：O353.2[理学—流体力学]