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基于子模型技术的转向架构架疲劳寿命预测

杨宏,王红,商跃进

基于子模型技术的转向架构架疲劳寿命预测

杨宏,王红,商跃进

(兰州交通大学 机电工程学院,甘肃 兰州 730070)

要:以CRH380B型动车组转向架焊接构架为研究对象,依据UIC 615-4加载标准计算了构架的整体静强度,并对局部应力进行了分析,找到了平均应力及应力幅较大部位。为更精确的估算关键焊缝的疲劳寿命,采用了子模型技术。在验证子模型可靠的基础上,运用Fe-safe软件中基于等效结构应力法的Verity模块估算了焊缝的疲劳寿命。分析结果表明,该构架的强度符合标准UIC 615-4的要求,焊缝的疲劳寿命也满足设计要求。

关键词:焊接构架;焊缝;子模型技术;等效结构应力法;疲劳寿命

中图分类号:U269.34        文献标志码:A      文章编号:1007-4414(2018)01-0032-04

Fatigue life Prediction of Welded Bogie Frame

Based on Sub-model Method

YANG Hong,WANG Hong,SHANG Yue-jin

(School of Mechatronic Engineering, Lanzhou Jiaotong University, Lanzhou 730070,China)

Abstract: CRH380B EMU bogie frame was taken as the research object. According to UIC615-4 Loading standard, the overall static strength was calculated and the local stress was analyzed to find the average stress and stress amplitude. In order to estimate the fatigue life of the critical weld more accurate, using sub-model method. On the basis of reliable verification of the sub-model, the fatigue life of the weld was estimated by using the Verity module based on the equivalent structural stress method in Fe-safe software. The results showed that the strength of the frame met the requirements of the standard UIC 615-4, and the fatigue life of welds also met the design requirements.

Key words: welded bogie frame; weld; sub-model method; equivalent structural stress method; 

分类:研究与试验

收稿日期:2018-12-28

基金项目:

作者简介:杨 宏(1990-),女,甘肃靖远人,在读硕士研究生,研究方向:机车辆零部件疲劳可靠性及 CAD/ CAE。

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