岩体裂隙扩展过程的有限元仿真

Simulation of the crack propagation process of rock mass based on the finite element method

利用1/4奇异元和动态网格调整技术,对岩体裂隙动态扩展过程给出了一较理想的自动跟踪方法。研制并调试完成了具有较强功能及实用性的岩体裂隙扩展过程的动态跟踪仿真程序RCPTP。该程序除能够跟踪仿真裂隙扩张过程以外,还考虑了多种工程因素(如开挖、支护等),能适应于复杂工程岩体结构的稳定性分析及变形特征超前预测。通过算例证明了本研究思想的正确性、有效性和实用性。

By using the collapsed singular isoparametric element and the dynamic grid remeshing technique, an ideal automatic tracking method is presented for the dynamic and random process of rock crack propagation,and the tracking program of rock crack propagation is developed and debugged successfully. While simulating the process of rock crack propagation,various engineering factors such as excavation, support,are considered,then the stability analysis of complex engineering rock mass structure and the prediction of the deforming behavior can be made. Calculation examples and an engineering case are given,and the obtained results prove that the presented method is practical and reliable.