具有刚性覆盖层的界面圆环形衬砌对SH波的散射

采用Green函数方法研究界面圆环形衬砌对SH波的散射问题，取含有半圆环形衬砌的弹性半空间在其水平表面上任意一点承受时间谐和的出平面源荷载作用时位移场的解答为Green函数，并采用契合方法推导出求解该问题的定解积分方程组，衬砌边界面点对应的附加外力系的值反映了该点的动应力集中程度，采用直接离散的方法将定积分方程组转化为线性代数方程组计算求解，给出了具有刚性覆盖层地各种介质参数对界面环形衬砌周边动应力集中系数的影响。

Scattering of SH-Wave by Interface Cirular Lining with Rigid Surtacing Layer

The scattering of SH_wave by interface circular lining is studied using the Green's function, a essential solution of displacement field for the elastic half space with a half circular lining bearing out_plane harmonic line load at horizontal surface, and setting up the integral equations through the corresponding method and interface continuity conditions. For the model of circular lining, the added force at the interface point of the lining is related to its dynamic stress concentration factor, the solution of dynamic stress concentration factor (DSCF) is obtained. The integral equations for determination of unknown forces can be transformed into algebraic equations and solved numerically. Finally, the influence of different medium parameters upon dynamic stress concentration factor are discussed when there is a rigid surtacing layer on the interface circular lining.