大轴重矿石车车体焊缝疲劳寿命分析  

Fatigue Life Prediction for Weldline in Ore Carbody with Heavy Axle Load

作　　者：谢素明[1] 于建东[1] 张露颖[2] 

机构地区：[1]大连交通大学交通运输与工程学院,辽宁大连116028 [2]中国北车集团齐齐哈尔铁路车辆有限责任公司技术中心,黑龙江齐齐哈尔161002

出　　处：《大连交通大学学报》2014年第1期1-5,共5页Journal of Dalian Jiaotong University

基　　金：国家863课题资助项目(2012AA040912);铁道部科技研究开发计划资助项目(2011J014-B);国际科技合作资助项目(2010DFB80050);辽宁省高校创新团体资助项目(LT20100016)

摘　　要：为研究重载货车车体焊缝疲劳寿命,以某大轴重矿石车车体为研究对象,在AAR标准静态载荷的作用下,对货车车体进行静强度分析与评价;在此模型的基础上,依据车体焊接工艺图,创建包括焊缝在内的矿石车车体疲劳寿命分析模型;在AAR标准动态载荷的作用下,应用等效结构应力法研究车体关切焊缝的结构应力分布规律以及疲劳寿命,并对寿命薄弱部位结构进行改进,改进后焊缝寿命明显提高.In order to study fatigue life of weldline in heavy wagon carbody, a complex finite element model of ore carbody with heavy axle load is established and analyzed when it is supported to static loads form AAR standard. Then, a fatigue analysis model of the carbody including key weldlines is bulit, fatigue life prediction for these weldlines is performed by the equivalent structural stress method and load spectrum of AAR, and weld lines of more shorter fatigue life are pointed out. The improved structure is proposed to be put forward on the basis of structural stress analysis at weldlines, and their fatigue life is increased greatly.

关 键 词：大轴重货车 车体焊缝 疲劳寿命 等效结构应力法 

分 类 号：U466[机械工程—车辆工程]