[1]刘文飞,刘志明,许昶,等.基于均方差应力修匀的大横梁焊缝疲劳损伤评估[J].哈尔滨工程大学学报,2019,40(05):1006-1012.[doi:10.11990/jheu.201806064]
 LIU Wenfei,LIU Zhiming,XU Chang,et al.Fatigue damage assessment for weld joint of cross bearer based on mean square deviation weighted stress smoothing[J].hebgcdxxb,2019,40(05):1006-1012.[doi:10.11990/jheu.201806064]
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《哈尔滨工程大学学报》[ISSN:1006-6977/CN:61-1281/TN]

卷:
40
期数:
2019年05期
页码:
1006-1012
栏目:
出版日期:
2019-05-05

文章信息/Info

Title:
Fatigue damage assessment for weld joint of cross bearer based on mean square deviation weighted stress smoothing
作者:
刘文飞1 刘志明1 许昶1 祁晨宇2
1. 北京交通大学 机械与电子控制工程学院, 北京 100044;
2. 包头职业技术学院, 内蒙古 包头 014030
Author(s):
LIU Wenfei1 LIU Zhiming1 XU Chang1 QI Chenyu2
1. School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China;
2. Baotou Vocational & Technical College, Baotou 014030, China
关键词:
敞车焊缝应力修匀结点应力均方差加权疲劳损伤疲劳寿命有限元高斯积分点
分类号:
U270.12
DOI:
10.11990/jheu.201806064
文献标志码:
A
摘要:
针对C80E型通用敞车车体大横梁焊缝在运用过程中出现的疲劳裂纹问题,本文提出了一种基于均方差加权应力修匀的疲劳损伤评估方法。根据车体结构对称性,建立了1/4车体模型并进行有限元仿真,采用均方差加权应力修匀法对大横梁焊缝结点应力进行修匀;分别计算修匀后的应力值与结点应力均值、最大值在大秦线实测载荷谱下的疲劳损伤,并与实测线路应力谱对应的疲劳损伤进行对比分析。结果表明:经均方差应力修匀对应的疲劳损伤与实测损伤基本一致;与传统采用的均方差应力修匀方法获取的结点应力方法相比,结点应力均值或最大值精度更高,可提高结构疲劳损伤评估的准确性,且该方法简单,便于应用。

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2018-6-23。
基金项目:国家重点研发计划项目(2016YFB1200501-008);国家重点研发计划项目(2016YFB1200602-07).
作者简介:刘文飞,男,博士研究生;刘志明,男,教授,博士生导师.
通讯作者:刘文飞,E-mail:liuwenfei45@163.com
更新日期/Last Update: 2019-05-14