轴承定位套热锻成形问题的无网格SPH法分析

Meshless SPH method analysis of hot forging problems for bearing positioning sleeve

基于配点型无网格理论和紧支试函数加权残量法理论基础,构造了满足一致性条件的核近似函数,在域内及域边界上节点满足平衡方程及力和位移边界条件的基础上,寻找稳定方案,并建立了三维弹塑性SPH模型。将所建模型运用到某重装企业的轴承定位套锻件生产研究中,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SPH法和FEM法模拟,通过与实验数据的对比分析,验证了SPH模型的正确性和SPH法在分析金属塑性成形过程的优越性,对实际生产具有一定的参考价值。

The kernel approximation function which meets consistency condition has been built on the basis of the match point type meshless theory and compact supported trial function weighted residual method theory. A stable solution has been found when the nodes in the domain satisfy the equilibrium equation while nodes on the domain boundaries satisfy the force and displacement boundary condition. A 3D elastic-plastic model has been established and applied into the production research of some bearing positioning sleeve manufacturer. The SPH and the FEM methods have been adopted to simulate the whole forming process ineluding the material parameters and the forging size, etc. By comparison and analysis with experiment data, the correctness of SPH model and its superiority in analysis of metal plastic forming process have been verified. It has certain reference value to the actual production.