摘要
Mohr-Coulomb(M-C)准则能较好地描述岩土材料的强度特性,在岩土工程中应用广泛,ANSYS大型有限元软件采用外角点外接圆Drucker-Prager(D-P)准则,研究发现两种准则的计算结果有较大差别。以某开挖边坡为例,建立ANSYS有限元模型,分别计算了外角点外接圆D-P和内切圆D-P准则下边坡开挖后的位移、应力情况。利用ANSYS-ADINA接口程序建立相同网格的ADINA有限元模型,在M-C准则下对开挖边坡进行重新核算。计算结果对比分析表明:内切圆D-P准则下的计算结果和M-C准则下的计算结果十分接近,而且可以避免对ANSYS程序进行二次开发,参数转换简单易行,具有良好的适用性,研究成果对于岩土工程的数值分析具有借鉴意义。
Mohr-Coulomb （M-C） criteria describes the characteristics of soil materials in geotechnical engineering well, so it＇s widely used. Finite element software ANSYS uses exterior angle point eireumcircle Drucker-Prager （D-P） criteria and numerical simulation results existence hig error. Inscribed circle D-P criteria can match with M-C criteria, and has better convergence. Based on a slope excavation for example, ANSYS finite element model is established, and separately calculated the displacement and stress after excavation with Exterior angle points D-P and inscnbed circle D-P criteria. Using the ANSYS-ADINA interface procedure to establish the same grid ADINA finite element model, the excavation of the slope is recalculated. Comparison resuhs show that the results of ANSYS under the inseribed circle D-P close to the calculated results of ADINA under M-C, has a good applicability.
出处
《露天采矿技术》
CAS
2010年第1期11-13,17,共4页
Opencast Mining Technology
基金
国家自然科学基金项目(90610029)
湖北省教育厅自然科学研究项目计划(Q20091901)
