基于ANSYS的三维初始地应力场模拟方法  

Numerical simulation method for 3D initial geostress field based on ANSYS

作　　者：王勇[1] 杨维好[1,2] 

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221116 [2]中国矿业大学力学与建筑工程学院,江苏徐州221116

出　　处：《煤炭工程》2016年第10期77-80,共4页Coal Engineering

基　　金：国家高技术研究发展计划(863计划)资助项目(2012AA06A401)

摘　　要：为了精确模拟三维初始地应力场,为后续地下工程数值分析奠定基础,通过将地层材料假设为正交各向异性,利用其弹性本构关系,提出了一种仅需设置地层三个正交方向的泊松比即可实现ANSYS软件对地应力模拟的新方法。结果表明:采用新方法模拟所得地应力分布与理论值吻合;利用等效节点反力平衡法消除得到的初始位移在10-15m以下,满足精度要求;当地层材料为弹性时,该方法适用于所有常用单元,而当地层材料为弹塑性时,例如DP材料或双线性随动强化材料,则仅有SOLD45等部分单元适用。总体而言,该方法避免了目前常规模拟方法中复杂的编程过程,具有较好的可行性与较高的模拟精度。In order to simulate 3D initial geostress field accurately and lay a foundation for the following numerical analysis of underground engineering,a new method was put forward to simulate geostress in ANSYS only by setting Poisson＇s ratios in three orthogonal directions of formation through assuming the formation as the orthogonal anisotropic material and using its elastic constitutive relation. The results show that the geostress distribution simulated by the new method coincides with the theoretical values well; the initial displacement eliminated by the equivalent node reaction force balance method is below10 ~ 15 m,which could meet the accuracy requirement; when the formation material is elastic,this method is applicable to all common elements,however,when the formation material is elasticoplastic,such as DP material or bilinear kinematic hardening material, only partial elements like SOLD45 are applicable. Overall, the new method avoids the complex programming process in the conventional simulation and has good feasibility and high accuracy.

关 键 词：初始地应力场 ANSYS 数值模拟 正交各向异性 泊松比 

分 类 号：TD315[矿业工程—矿井建设]