【摘要】 基于应变空间理论,选择不同的塑性势函数(M-C关联准则和D-P非关联准则),对Mohr-Coulomb本构模型给出了它的数值计算格式,同时阐述了编制的关键技术和具体实施方法。采用FLAC3D二次开发平台UDM,在UserMohr模型的基础上使用Visual Studio 2005编译得到本构模型的动态链接库文件(DLL),实现了应变空间中弹塑性本构模型的二次开发。并利用地下盐穴静力溶腔过程模拟的验证算例进行对比分析。结果表明,计算结果与FLAC3D自带Mohr-Coulomb本构模型及解析解在弹塑性条件下进行比较,差值均很小,从而验证了程序的正确性。该程序可以为地下盐穴储库的溶腔模拟和长期运行流变分析提供一种可选择的数值模拟方法。更多还原

【Abstract】 Based on the theory of strain space,the numerical computational scheme was proposed for Mohr-Coulomb constitutive relation,by using different plastic potential function(M-C associated criteria and D-P non-associated criteria),and the key technologies and concrete methods of implementation were explained.Through the secondary development platform UDM of FLAC3D,by using Visual Studio 2005 on the basis of UserMohr model,the dynamic link library file(DLL) of the constitutive model was compiled and the secondary development of elasto-plastic constitutive model in strain space was realized.Underground salt caverns static dissolved simulation validation examples were compared and analyzed.The results showed that the calculated results were almost consistent with the FLAC3D self-defined Mohr Coulomb constitutive model and the analytical solutions under the elastic-plastic conditions,which verified the validity of the software.The software could provide an alternative numerical simulation method for underground salt dissolved cavity simulation and long-term operation rheology.更多还原