一步法冲压映射在汽车座椅碰撞仿真中的应用

Application of One-Step Forming in Crash Simulation of Automobile Seat

为指导座椅设计、降低开发工时,基于一步法冲压映射研究了钣金件冲压后产生的残余应变、塑性变形对汽车座椅碰撞仿真结果的影响,研究冲压映射过程的自动化处理方法。通过Altair HyperWorks软件的Radioss_One_Step模块模拟钣金件冲压;利用Tcl/Tk以及Python语言优化编程,实现座椅全部钣金件冲压模拟的自动化批量处理,并将冲压结果自动映射至碰撞模型;以某车型驾驶员座椅为研究对象,进行第50百分位男性假人后撞仿真与物理试验的对比分析。研究发现:带有冲压映射结果的仿真分析更接近物理试验,仿真更加精确,与手动处理相比,采用优化的批处理程序降低工时90%以上。

To guide the design of car seats and save development time,this paper studied the effects of residual stress and plastic deformation generated after sheet metal parts stamping on the crash simulation of car seat based on one-step stamping,and investigated the automatic processing method of stamping process.Stamping simulation of sheet metal parts was conducted through the Radioss_One_Step module of Altair HyperWorks software.The program was optimized by TCL/TK and Python language,to achieve the automatic batch processing of stamping simulation of all sheet metal parts of seat,meanwhile,the stamping results was automatically mapped to crash model.This paper took the driver’s seat of a vehicle as research object to perform crash simulation and physical test of the 50th percentile male dummy.It is found that the rear impact simulation with the stamping results is closer to the physical test,the simulation is more accurate.Moreover,the optimized batch program can save more than 90%of the working time.