摘要
探讨了基于ANSYS的有限元强度折减法强度准则的选取问题,推导出德鲁克-普拉格准则不同形式的安全系数的转换关系。通过算例,验证了转换关系的正确性。发现基于ANSYS的内置外角点外接圆准则计算的安全系数偏大、偏危险。对于二维边坡问题,可将其转换成平面应变圆准则下的安全系数(非关联流动法则)或内切圆准则下的安全系数(关联流动法则);对于三维边坡问题,可转换成内角点内接圆准则下的安全系数。
The selection problem of strength criterions of FEM strength reduction method based on ANSYS is discussed, and the conversions of safety coefficient of different Drucker- Prager criterionforms were derived. Through many examples, the correctness ot the conversion relationship is venlied. The results show that the calculation of safety factor of external angle ＆ circumcircle criterion built-inANSYS is larger and more dangerous. For the problem of two-dimensional slope, Its safety factor calculated by ANSYS can be converted to the safety factor of plane strain circle criterion （non-associated flow rule） or inscribed circle criterion （associated flow rule）. The 3D slope stability problem can be converted into the safety factor of the corner points and inscribed circle criterion.
出处
《煤炭技术》
CAS
北大核心
2016年第9期123-126,共4页
Coal Technology
基金
国家重点基础研究发展计划(973计划)项目(2013CB227900)
国家自然科学基金资助项目(U1261201)
关键词
边坡
稳定性分析
强度折减法
强度准则
slope
stability analysis
strength reduction method
strength criterion
