论文部分内容阅读
基于AutoCAD和OpenGL有限元可视化建模,利用Fortran语言对模型文件中的单元信息进行改写,提出了一种在地下厂房有限元模型中生成沥青单元网格的方法,显著减少了模型单元数与节点数,提高了建模与计算效率。采用隐式杆单元法模拟涂沥青锚杆,隐式柱单元法模拟普通锚杆,推导了其刚度矩阵及有限元迭代计算公式,并应用于地下厂房岩锚梁锚杆涂沥青段的有限元分析中。结果表明,吊车梁附近围岩破坏区减少,围岩深部锚杆应力增大,说明围岩受力特性得以改善,围岩和吊车梁整体安全度增大,符合工程实践经验。所提出的计算和单元再分方法可操作性和实用性大,可为类似工程有限元分析提供参考。
Based on the AutoCAD and OpenGL finite element visualization modeling, Fortran language was used to rewrite the cell information in the model file. A method of generating bitumen cell grid in finite element model of underground powerhouse was proposed, which reduced the number of model elements and nodes Number, improved modeling and computational efficiency. The bitumen bolt was simulated by the implicit pole element method and the ordinary anchor rod was simulated by the implicit column element method. The stiffness matrix and iterative calculation formula of the finite element were deduced. The finite element method was applied to the finite element Analyzing. The results show that the failure area of surrounding rock near the crane girder decreases and the stress of the anchor bolt in the surrounding rock increases. This indicates that the mechanical properties of the surrounding rock are improved and the overall safety of the surrounding rock and crane beam increases, which is in line with engineering practice. The proposed calculation and unit subdivision method are feasible and practical, which can provide reference for similar engineering finite element analysis.