基于稳定性的不锈钢地铁底架焊点布局改进

Solder Joint Layout Improvement of Stainless Steel Subway Underframe based on Stability

以某不锈钢地铁底架为研究对象,利用有限元仿真软件对其进行稳定性分析,找出底架容易失稳的薄弱位置以及对应的屈曲因子.结果表明:不锈钢地铁底架最容易失稳的部位为枕梁附近边梁处波纹地板,焊点位置和数量会对屈曲造成一定的影响.从结构和力学的角度,对失稳位置的焊点布局进行改进,得到新的设计方案.对比新的方案与初始方案的屈曲结果可知,合理布置焊点位置能在保证静强度的情况下,明显增加结构的稳定性.为今后不锈钢点焊车底架的生产和研发提供了参考.

Taking a stainless steel subway underframe as the research object,finite element simulation software is used to conduct stability analysis to find out the weak position where the underframe is unstable and the corresponding buckling factor. The results show that the most instable part of the stainless steel subway underframe is the corrugated floor nearby the side beams and the body bolster,and the location and number of solder joint will have an effect on buckling. The part of solder joint in the unstable position is improved to obtain a new design scheme based on the structure and mechanics. Comparing the new design with the buckling results of the initial design,reasonable layout of the solder joint can increase the stability of the structure significantly and ensure the static strength of the underframe. It provides a reference for the production and design of stainless steel subway underframe which is spot welding in the future.