【摘要】 对刚粘塑性有限元用于模拟分析叶片精锻过程的基本原理进行了论述 ;对模拟中需解决的关键问题提出了相应的算法和处理技术 ;开发了考虑工模具间的摩擦的三维刚粘塑性有限元模拟分析系统 .采用该系统 ,对航空发动机压气机简单叶片和带阻尼台叶片精锻过程进行了三维有限元模拟分析 .模拟过程中对榫头和叶身过渡处采用圆角连接 ,改善了金属的流动性和充填性 ,使叶片锻造三维有限元模拟的建模与分析更接近于实际过程 .结果表明 :采用作者所提出的基于边界构形的网格重划方法 -内缩法 ,进行畸变网格的重划是可行的 ;采用作者所提出的动态边界条件的处理方法以避免模具死锁问题是有效的 ;所开发的软件系统是可靠的 .更多还原

【Abstract】 The basic principles and the key technologies of 3-D rigid viscoplastic FEM simulation are introduced. 3-D rigid viscoplastic FEM simulation system considering friction between the die and the billet has been developed. By using this system, a simulation and analysis the precision forging of a simple blade and a blade with damper of aero engine compressor has been carried out. In the present simulation, the interface friction along the curved die surfaces is included, and the tenon and the body of the blade on the die are joined by arc. So, this simulation approaches the practical blade forging. By simulation, initial and deformed meshes have been obtained. The results show that: remeshing method of contracting from the boundary to inner proposed by the authors is practicable; It is effective for avoiding ″death space″ problem due to scatted die mesh by the method handling dynamic boundary proposed by the authors; the 3-D rigid viscoplastic finite element simulation system developed is reliable.更多还原