硐室围岩塑性区跟踪算法  

Determination of plastic zone of caverns by tracing algorithm

作　　者：陈振建[1] 王建华[1] 钟俊彬 

机构地区：[1]上海交通大学建筑工程与力学学院,上海200030

出　　处：《煤炭学报》1999年第6期595-598,共4页Journal of China Coal Society

基　　金：国家自然科学基金!资助项目(59879012)

摘　　要：常规的弹塑性有限元方法在确定塑性区时， 所得网格不能直观地反映出塑性区的形状和大小， 计算结果精度低． 采用自适应网格加密技术求解硐室围岩塑性区； 针对跟踪塑性区交界面这一具体问题， 采用了加权参数网格加密准则； 通过改变影响围岩塑性区的几个主要因素， 进行了大量的数值计算． 结果表明， 所提出的加密准则能有效地求出围岩塑性区的形状和大小．When the conventional finite element method is used to determine the plastic zone of caverns, the accuracy of the results obtained on such meshes is low, and the shape and size of plastic zone can not be directly visualized via the meshes. The adaptive refinement technique is used to determine the plastic zone of caverns in the paper. For the specific problems of tracing the interface between plastic and elastic zone, a weighted parameter mesh refinement criterion is presented. By changing several main factors that affect the shape and size of plastic zone, a lot of numerical computing are carried out. The results show that the criterion used in the paper is effective for determining the shape and size of plastic zone of caverns.

关 键 词：硐室 围岩 塑性区 跟踪算法 岩石力学 

分 类 号：TU457[建筑科学—岩土工程]