基于连续介质模型的离散元方法中弹簧性质研究.pdfVIP

25 6 Vol.25 No.6 2006 6 Chinese Journal of Rock Mechanics and Engineering June2006 1 2 2 2 2 (1. 300130 2. 100080) Gusev 0.25 1/3 Gusev Gusev TU 43 A 2006 STUDY ON SPRING PROPERTIES OF CONTINUUM-BASED DISCRETE ELEMENT METHOD 1 2 2 2 2 WEI Huaipeng YI Dake LI Shihai LIU Xiaoyu ZHAO Manhong (1. School of SciencesHebei University of Technology Tianjin300130China 2. Institute of MechanicsChinese Academy of SciencesBeijing100080China) Abstract The failure progress of geological material is a key scientific problem in the engineering of geological hazard and controland is also a front problem in mechanics. The continuum-based discrete element method (CDEM) is a numerical method to research this problem. According to the method to solve eigenvalues of matrix the analytical expressions of the spring stiffness in the discrete element from the stiffness matrix of the three-dimensional finite element is deduced and the rules how to choose the spring in the discrete element under different conditions are presented. The spring properties of the discrete element in the 8-node solid isoparametric element is investigated the expressions of the stiffness and directions of the spring between common edge particles between common diagonal of face particles and between common diagonal of cubic particles are deduced and the figures about the relation between the stiffness and directions of spring and Poisson ratio are given. Finallythe CDEM is compared with both Guse