Interactions between different cracks and the stress intensity factors for different crack surface forms are calculated , and the effect of the distance and the angle on the stress intensity factor is analyzed 算例计算了多种情况下裂纹之间的相互作用，分别给出了不同裂面状态下的应力强度因子，分析了各种情况下裂纹间的距离、夹角等因素对应力强度因子的影响。
Using the complex potential method in the plane theory of elasticity of an anisotropic body , a series solution to the stress field of a finite plate containing multiple cracks subjected to arbitrary loads is obtained by means of the faber series expansion , and the stress intensity factors at the crack tips are calculated based on the theories of fracture mechanics . equivalence yield stress is introduced in order to consider the effects of the plastic zones , with which the strip yield criteria is developed in the article so that the effects of structural size and the crack interactions on the stress distribution can be considered accurately . the effects of plate size , crack size and crack distributions on the stress intensity factors as well as the residual strength of the plate are studied detailedly 采用各向异性体平面弹性理论中的复势方法，以faber级数为工具，得到了含多裂纹有限大板在任意载荷作用下应力场的级数解，并应用断裂力学方法确定裂纹尖端的应力强度因子；引入当量屈服应力考虑裂尖塑性区的影响，提出基于带屈服准则的剩余强度分析模型，能够充分考虑结构尺寸和裂纹之间相互作用对应力场的影响；通过数值计算详细讨论了结构尺寸和裂纹之间位置关系对应力强度因子和结构剩余强度的影响规律，得到了一系列对工程应用具有实用价值的结论。
By using the arrived fundamental solution , combined with the " pseudo - traction " method and the boundary collocation , the stress intensity factor for crack in a finite plate under compressive loading are solved , the effects of crack direction and boundary condition on the stress intensity factor are analyzed , and the varying curves of the sif along with the width are given 将所得的基本解与“伪力法” 、边界配置法相结合，得到了有限板在压缩荷载作用下应力强度因子的解法，分析了裂纹方向和边界条件对应力强度因子的影响，给出了应力强度因子随板宽的变化曲线。
The study indicate that the surface form has no effect on kl , but has obvious effect on kll , and will affect the breaking angle and mode ; in finite plate , the boundary condition has effect on the sif and the k is bigger than in infinite plate ; the effect of the distance and the angle between cracks are all have obvious effects on the multiple crack interaction , and the interactions between cracks also have obvious effects on the sif , which can be neglect only when the distance is bigger enough 研究表明：裂面状态对k _的大小没有影响，而对k _的影响却很大，相同应力条件下，裂面状态会影响裂纹的开裂角和开裂方式；有限板的边界对应力强度因子有一定的影响，其k比无限板中的k略大；裂纹间的距离、夹角等因素对裂纹间的干涉效应均有较大影响，裂纹间的干涉效应对应力强度因子的影响非常显著，只有当裂纹间的距离充分大时，干涉效应才可忽略。
Based on the fem model of the dam - reservoir system , the influence of water compressibility to the hydrodynamics is systemically analyzed and researched . it is showed thaf the water compressibility has significant effect to the size and distributing of hydrodynamics on the high dam , and the absorbency of reservoir bottom has a role as a damper on the dam - reservoir system 基于库水体各类边界条件的有限元模型，系统分析了可压缩性对坝体动力响应的影响，表明水可压缩性对高坝动水压力强度和分布具有显著影响，而库底边界条件对大坝的地震反应有抑制作用。
