基于真实工艺参数数值模型的动力显式算法  

A New Process Numerical Model for Dynamic Explicit Incremental Method

作　　者：杜亭[1] 谢邵辉[1] 许江平[1] 章志兵[1] 柳玉起[1] 

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室,武汉430074

出　　处：《中国机械工程》2009年第19期2378-2381,共4页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(50905066);中央高校基本科研业务费专项基金资助项目

摘　　要：传统动力显式算法将拉深筋阻力、摩擦力等工艺参数所引起的约束阻力作为主动力进行处理,无法反映约束阻力的真实作用效果。针对该问题,通过采用弹簧单元提出了基于真实工艺参数的动力显式算法,该算法可以更加精确地反映实际成形过程中工艺参数所引起的约束阻力的同步、被动产生的效果,提高动力显式算法的计算精度。将提出的算法引入自主开发的板料成形模拟软件FAS-TAMP,计算了Numisheet 2005标准考题的成形过程,计算结果与实验数据比较接近,验证了算法的有效性。The constrain resistance force caused by drawbead and friction is always treated as active force,that can not simulate the real effect in stamping process.A new technique of constraint resistance treatment by means of linear elastic spring element model was proposed based on the dynamic explicit incremental method,which can be applied to build more accurate model of process parameters such as blank holding force,drawbead and friction,to reflect the effect of the process parameters actually generated synchronously and passively.The simulation results of Numisheet 2005 decklid are compared with experimental ones,which verifies the efficiency of the new treatment method.

关 键 词：板材成形 弹簧单元 工艺参数 约束处理 FASTAMP 

分 类 号：TG386[金属学及工艺—金属压力加工] TP391.9[自动化与计算机技术—计算机应用技术]