ANSYS三维地应力场数值模拟方法应用研究

A PRACTICAL ANSYS 3-D NUMERICAL SIMULATION METHOD FOR IN-SITU STRESS FIELD

初始地应力场由自重应力场和构造应力场叠加而成,是深部地下工程分析必须考虑的重要因素。针对目前常用的三维地应力场数值模拟方法在维持地应力场分布规律和避免附加位移方面存在的缺陷,进行了ANSYS地应力场模拟方法的比较研究。用java语言编写了针对不同ANSYS版本的初始应力文件合并程序,提出了高版本ANSYS初始应力文件合并的EXCEL简易方法,实现了不需编写任何其他程序、对所有类型单元通用的ANSYS初始应力平衡等效节点反力法,构建了一套实用的ANSYS三维地应力场模拟方法流程。

In-situ stress field,which is consist of self-weight stress field and tectonic stress field,is one of the most important factors in the deep underground engineering analysis.There are some defects in present commonly used three dimensional stress field simulation method,then it is not very well in maintaining ground stress field distribution rule and avoiding additional displacement.Firstly,two methods are evaluated and some Java programming is built based on the better one to create the initial stress file.And that can be done by a simple EXCEL method without programming when higher version ANSYS software is used.Then,a simple node reaction method is put forward to realize ground stress balance which means the displacement in the finite element model is zero.At last,all good methods in the process are integrated into a practical ANSYS 3-D numerical simulation method for in-situ stress field.