【摘要】 采用刚粘塑性有限元、灵敏度分析和工程优化算法相结合的方法 ,对一典型的多型腔齿轮坯锻件进行了预成形优化设计。通过优化预锻模具形状 ,可得到完全充满型腔少无飞边的终锻件。给出了灵敏度分析的基本公式和优化迭代步骤 ,并提出了贮存灵敏度刚度矩阵、减少优化设计变量的方法 ,大大提高了程序的运行速度更多还原

【Abstract】 The preform optimization design of a typical multi-cavity gear forging was carried out in this paper by combining rigid-viscoplastic finite element method, sensitivity analysis and engineering optimization algorithm. The nearly flashless final forging with complete die fill can be achieved by using the optimized preform dies. The fundamental formulas of sensitivity analysis and optimization iteration steps were given. This paper also presents a method of storing sensitivity stiff matrices and reducing optimization design variables. The program running time was greatly decreased by using the method.更多还原