论文部分内容阅读
针对滑架体焊接残余应力对疲劳断裂的影响,采用有限元方法,分析了滑架体焊接残余应力的分布规律,并结合等效结构应力方法对滑架体疲劳寿命进行了预测,通过试验验证了分析结果的正确性,同时分析了焊接顺序对残余应力及疲劳寿命的影响。结果表明滑架体中板与铲板焊缝处疲劳寿命最小,采用异向不同时焊接方法对滑架体的寿命影响小。
Aiming at the influence of residual stress on fatigue fracture of the carriage body, finite element method was used to analyze the distribution of residual stress on the carriage body. The fatigue life of the carriage body was predicted by the equivalent structural stress method. The correctness of the analysis results is analyzed, and the influence of welding sequence on residual stress and fatigue life is also analyzed. The results show that the fatigue life of the welded joints of the middle plate and the shovel plate of the carriage body is the smallest, and the influence of different welding methods on the service life of the carriage body is small.