摘要
本文采用边界元法研究了半空间中一近表面裂纹对SH波的散射问题,导出了以裂纹张开位移为未知函数的边界积分方程,针对边界积分方程高阶奇异性的特点,运用降低奇异性的方法,计算了裂纹边界面的裂纹张开位移、半空间表面的散射位移、裂纹尖端的动态应力强度因子。给出的算例表明,本文的方法不仅计算量小,而且有较好的精度。
In this paper,the problem of scattering of SH waves by a subsurface crack is investi gated by a BIE method. A set of boundary integral equation(BIE)with the unknown function of opening displacement is obtained. To the high order of singularity of integral equation,a method of depression of singularity is used. Opening displacement,surface displacement and dynamic stress intensity factors at the crack tips have been computed. Numerical results obtained are in good agreement with known analytic solution,and the proceeding of computation is simplified by this method.
出处
《地震工程与工程振动》
CSCD
北大核心
1992年第4期25-29,共5页
Earthquake Engineering and Engineering Dynamics
