【摘要】 离散单元法是一种适用于不连续岩体稳定分析的数值方法，可用于模拟岩体的大变形及系统的失稳破坏过程。提出了一种可用于岩体动静力稳定分析的三维离散元模型的凸多面体角边修圆模式及接触关系检测算法，此法将接触区域分为角区域、边区域和面区域，采用分级检索。对于接触刚度、阻尼系数、时步等参数作了讨论，同时建立了相应的动力学模型，并验证了振动台上的两刚块振动实验结果。结果表明：计算所得的加速度、位移过程曲线与试验结果吻合较好。该模型可分析在静力与动力作用下岩体的大变形失稳过程。更多还原

【Abstract】 A numerical model of dynamic three dimensional distinct element method(DEM) is developed for static and dynamic stability analysis of rock bodies. The contact zones are divided into face zone,edge zone and corner zone. The multistage technique for contact searching is used. The contact stiffnesses, damping coefficients of contact interface and time step in computation are selected based on the previous studies. The dynamic responses of two rigid bodies are examinated by shaking table test compared with the numerical results and the accuracy of the proposed procedure is verified. The proposed model can be used to analyze the large deformable displacement under static and dynamic loads.更多还原