岩土力学2013，Vol.34Issue(2)：526-534,9.
接触处理Munjiza方法在数值流形法中的应用
Application of Munjiza's algorithm to contact treatment in numerical manifold method
摘要
Abstract
Contact treatment of the numerical manifold method (NMM) mainly includes contact detection, including point-point and point-line contact, open-close iteration for determining the correct constrained state, and contact transfer by which effective contact couples can be transferred to the next time step. The whole process is slightly complicated and inefficient. Besides, the contact modes adopted in the NMM are quite different from the real physical contact state. The no binary search (NBS) contact detection algorithm proposed by Munjiza maps all elements into regular cells and connects the elements by the list structure effectively. The contact detections are limited within the cell and the four neighboring cells. With low requirement of random access memory, contact detection operation is just proportional to the number of the elements, and the efficiency is accordingly increased significantly. With the defined 'potential', contact pressure, belonging to the distribution category, is calculated by the contact overlapped area, which is closer to the real contact state, and avoids the cumbersome process involved in the NMM. As a result, it is introduced to the NMM as an alternative contact treatment method. The effectiveness is verified by the examples.关键词
势接触力/接触判断/NMM/FEM-DEMKey words
potential contact force/ contact detection/ numerical manifold method (NMM)/ FEM-DEM分类
数理科学引用本文复制引用
徐栋栋,孙冠华,郑宏..接触处理Munjiza方法在数值流形法中的应用[J].岩土力学,2013,34(2):526-534,9.基金项目
国家杰出青年基金资助项目(No.50925933) （No.50925933）
国家自然科学基金-面上项目(No.11172313) （No.11172313）
本文的工作得到了国家重点基础研究发展计划"973"课题(No.2011CB013505)的资助,在此谨表谢意！ （No.2011CB013505）
