针对采用三维刚塑性有限元法模拟三通管挤胀成形过程所遇到的一些关键问题, 如有限元计算模型的建立、模具型腔表面的几何描述、动态边界条件处理、空间坐标转换矩阵的推导等,给出了较为通用的处理方法。实际计算过程表明, 所提出的处理方法是有效的、可行的, 有助于提高模拟软件的通用性和自动化程度 Aiming at some key problems encountered in the simulation of three-way pipe extrusion forming process by using the three-dimensional rigid-plastic finite element method, such as the establishment of the finite element calculation model, the geometric description of the mold cavity surface, the dynamic boundary condition processing, the space coordinate transformation matrix Derived, etc., given a more general approach. The actual calculation process shows that the proposed processing method is effective and feasible, which helps to improve the versatility and automation of simulation software