基于有限元方法的车身B柱全工序焊接变形研究及应用

打开文本图片集

中图分类号：TP391.9；U463.83 文献标志码：B

Research and application of whole-processes welding distortion in B pillar based on FEM

WANG Yidong

(SAICMotorCo.，Ltd.，Shanghai200030，China)

Abstract： To research the influence of welding distortion from diffrent vehicle structures，the finite element models of resistance welding in B pillar area are established both for original car in Europe and product safety measure （PSM） car in China. The welding distortion in B pillar is simulated by thermoplastic finite element method.At the same time，the chain-simulation is finished for wholeprocesses welding in B pillar area，and the total welding distortion is got.The results show that the maximal distortion in B pillar is 0.85mm ，which is in good agreement with real distortion 0.90mm . The total distortion from whole-processes chain-simulation issmaler than simple accumulation of each processes，and it meets the real produce better.

Key Words： hot-forming plate； welding deformation； whole-process； chain-simulation；reposition

0引言

车身B柱是碰撞试验的重点区域，直接影响乘员的生命安全。（剩余8131字）