摘要
鉴于接头焊接工艺对车身结构的影响,提出了一种客车骨架接头焊缝焊接顺序优化方法。首先从客车结构中选取待优化的接头,采用与实际接头相同材料和尺寸的方形钢管,按8组不同焊接顺序进行焊接试验,测取中心点的焊接变形,从中选出一组变形相对较小的焊接顺序方案;以此为基础,为进一步寻优,通过坐标转换,确定新的8组不同焊接顺序的试验方案,获得新的8组保持幅值较小的变形数据;然后建立接头的有限元模型,通过有限元分析获得接头的焊接变形应力,并将其引入整车骨架分析,与实际工况下的应力进行叠加,获得接头处的实际应力,并以此为依据确定相对合理的焊接顺序;最后,总结出客车骨架接头焊缝焊接顺序优化流程。
In view of the effects of joint welding process on vehicle-body structure, a method of welding sequences optimization for the joints of body framework is proposed. Firstly,the joints to be optimized are selected, and using the square steel tube of the same material and dimension as that of joint to perform welding tests with eight different schemes of welding sequences and the deformations of center point are measured, from which a scheme with relatively small deformations is selected. Based on this, for further optimizing, a new set of eight different schemes of welding sequences is devised through coordinates transform, and eight groups of deformation data, keeping their amplitudes relatively small,are obtained. Then a finite element model for joint is built and the stress in joint caused by welding deformation are obtained through finite element analysis, which are then taken as input to entire body framework analysis and are superimposed on the stress induced by real working load to get the resulting stress in joint,based on which the relatively rational welding sequence is determined. Finally, a typical procedure of welding sequence optimization for joints in a bus body framework is summarized.
出处
《汽车工程》
EI
CSCD
北大核心
2016年第9期1158-1162,共5页
Automotive Engineering
基金
国家自然科学基金(51375201)资助
