板料弯曲成形数值模拟参数敏感性分析

在单因素敏感性分析的基础上,利用定义了无量纲形式的敏感度函数和敏感度因子的多因素敏感性分析方法,对板料弯曲成形数值模拟前处理阶段可控模拟参数进行了敏感性分析.结果表明,冲头虚拟加载速度Vp是影响板料弯曲成形数值模拟前处理阶段可控参数对结果扰动度大小的敏感因素.通过敏感性分析剔除了非敏感因素,为提高板料弯曲成形数值模拟精度而进行的前处理参数优化提供了方便,减少了计算工作量,为实际成形优化了试验方案.

Parameters sensitivity analysis of sheet bending based on numerical simulation

Based on the multi-parameters sensitivity analysis method, the sensitivity of controllable simulation parameters of metal sheet L-Bending was analyzed. The results show that punch virtual loading velocity Vp is the most sensitive parameter of metal sheet L-Bending in numerical simulation. Based on parameters sensitivity analysis, the non-sensitivity parameters were eliminated, and a mass of calculation works were cut down during subsequently parameters optimization of metal sheet L-Bending based on numerical simulation. At the same time, the plans of practice forming test were optimized.