岩石力学离散单元计算方法中的若干问题探讨

INSIGHT INTO SOME ASPECTS OF DISCRETE ELEMENT NUMERICAL METHODS FOR ROCK MASS

对节理岩体中以离散的块体单元为计算模型的离散单元计算方法中的一些常遇到的问题和难点,进行了较深入的讨论,主要涉及到离散单元计算方法的各种算法及特点、块体的变形问题和块体之间的叠合、方程求解问题特别是单个块体求解与整体方程求解的内在关系、接触检索问题包括三维块体的接触检索等方面,指出了一些问题上的不足,提出了建议,并得到了一些有益的结论。

Discrete element numerical methods are based on isolated block model of jointed rock mass. In this paper, some typical problems and difficulties of discrete element numerical methods are studied so as to obtain clearer and deeper understanding to them. The problems and difficulties are associated with various algorithms of discrete element numerical methods and their peculiarities, deformation, overlap between blocks, contact detection (including that of three-dimensional problems) and equation solving (especially the inherent relation between the single-block-equation solving and the whole-equation solving). Some helpful and meaningful results are obtained.