货车车体焊接结构疲劳寿命评估反问题研究  

Research on the Inverse Problem in Fatigue Life Estimation for Welded Structures of Freight Carbodies

作　　者：谢素明[1] 王惠子[1] 李晓峰[1] 兆文忠[1] 

机构地区：[1]大连交通大学交通运输工程学院,辽宁大连116028

出　　处：《铁道车辆》2009年第11期4-7,共4页Rolling Stock

基　　金：铁道部科技研究开发计划重点课题(2009J005-C);辽宁省教育厅项目(2008S037)

摘　　要：为在规定的设计寿命下确定车辆结构的设计细节,推导了基于AAR标准的货车车体焊接结构在多载荷谱作用下的疲劳评估反问题的解析表达式。以某出口货车车体为例,给出了基于AAR标准进行焊接结构疲劳评估反问题分析的全过程。分析结果表明,文章所提出的方法可以高效地求出指定设计寿命下焊接结构的设计应力,可为改进车辆设计方案和实现等寿命设计提供理论依据。With the specified designed service life,the design details of vehicle structure are determined,the analytic expression of a inverse problem of fatigue life estimation of the freight carbody welded structure under multi-load spectrums is derived on the basis of AAR Standard.With the carbody of an exported freight car as an example,the whole process of analyzing the inverse problem in fatigue life estimation of the welded structure on the basis of AAR Standard is given.The analysis result shows that,with the method in this paper,the design stress of the welded structure under the specified designed service life can be obtained efficiently,and can provide theoretical basis for improving the design scheme of vehicles and realize equivalent life design.

关 键 词：货车 焊接结构 疲劳评估 反问题 

分 类 号：U270.32[机械工程—车辆工程]