列车工作轮热锻成形问题的无网格EFGM分析  

Meshless EFG analysis of hot forging problems for train wheel

作　　者：杨垠耘 刘泓滨[1] 刘欣玮 

机构地区：[1]昆明理工大学机电工程学院,云南昆明650504

出　　处：《锻压装备与制造技术》2016年第6期60-64,共5页China Metalforming Equipment & Manufacturing Technology

基　　金：昆明理工大学学生课外学术科技创新基金资助项目(2015YB017)

摘　　要：基于伽辽金型无网格理论和紧支试函数加权残量法理论基础,在确定近似函数定义域及节点支撑域的前提下,利用移动最小二乘近似构造了满足条件的权函数,在弹性力学控制方程的基础上构造伽辽金型无网格格式,对比选择积分方案,寻找引入试探函数约束条件的合适方法以确定边界条件处理方式,建立了三维弹塑性EFG模型。将所建模型运用到某重装企业的列车工作轮锻件生产研究中,对热锻过程中的材料特性参数、锻件尺寸参数等进行了全面的EFG和FEM模拟,通过与实验数据的对比分析,验证了EFG模型的正确性和EFGM在分析金属塑性成形过程的优越性,对实际生产研究具有一定的参考价值。The Galerkin meshless theory and the compact supported trial function weighted residual method theory have been adopted. On the premise of determining the approximate function and the nodes＇ support domains, the weight function has been built by use of the moving least-square approximation, which can meet the conditions. The Galerkin meshless format has been established on the basis of elastic mechanics control equation. The integral solution has been compared and selected. The suitable method to introduce the trial function＇s constraint conditions in order to determine the right handle way for boundary conditions has been searched. Thus in this way, the EFG3D elastic-plastic model has been established. The model has been ap- plied into the production study of train wheel forging from some enterprise. The EFG and FEM simulation has been conducted to the whole forming process, including the material parameters and the forging size, etc. By comparison and analysis with the experiment data, the correctness of EFG model and the superiority of EFG method in analysis of hot forming process have been verified. It provides certain reference for practical production study.

关 键 词：锻造成形 EFG法 FEM法 列车工作轮 

分 类 号：TG316.4[金属学及工艺—金属压力加工]