对三维离散单元法中块体接触判断算法的改进

Improvem ent of Contact Judgem ent Algorithm in 3-D DEM

三维离散单元法中块体间的接触判断一般采用间接方法。基于公共面法，引入直接判断法对传统的间接判断算法进行改进，并通过算例进行了对比，结果表明，改进后的算法比原算法具有更高的效率。

Indirect m ethod is generally used to judge contact type betw een tw o blocks in three dim ensionaldiscrete elem ent m ethod. The idea of direct judgem ent m ethod is introduced in this paper to im prove thetraditional contact judgem ent algorithm , and the com parison is m ade betw een the previous m ethod and theim proved m ethod. The result indicates that the im proved algorithm has relatively high efficiency.