基于试验模态验证的铁路敞车侧墙疲劳寿命预测  

Fatigue Life Prediction of Open Wagon Sidewall based on Test Modal Analysis

作　　者：马思群[1] 田小龙 牛小伟[2] 金辉 冯良波 

机构地区：[1]大连交通大学交通运输工程学院,辽宁大连116028 [2]郑州铁路职业技术学院,河南郑州450052 [3]中车长春轨道客车股份有限公司,吉林长春130062

出　　处：《大连交通大学学报》2017年第6期64-69,共6页Journal of Dalian Jiaotong University

基　　金：国家自然科学基金资助项目(51220001,51405057); 中国铁路总公司科技研究开发计划资助项目(2013J012-B); 辽宁省教育厅高等学校科学研究计划资助项目(L2014182)

摘　　要：运用Hyper Mesh建立敞车的有限元模型,使用ANSYS软件对敞车侧墙进行仿真模态分析.采用LMS Test.lab软件中的工作模态参数识别方法对敞车侧墙进行试验模态分析,并获得了其固有频率、振型和阻尼比等模态参数.通过仿真模态分析和试验测试参数对比分析可知,结果基本吻合,从而验证了敞车侧墙的有限元模型的准确性,在此基础上基于ASME(2007)标准中结构应力法和Miner线性累积疲劳损伤理论,并采用AAR标准载荷谱对敞车侧墙的关键焊缝进行了疲劳寿命预测,结果满足设计要求.A finite element model for open wagon was established with Hyper Mesh software,and sidewall modal analysis was calculated with ANSYS software. Sidewall experiment modal analysis was carried out by LMS test lab software with operational modal parameter identification method,and the modal parameters such as natural frequency,vibration mode and damping ratio were obtained. The comparison between the results of modal parameters obtained by simulation modal analysis method and test method are uniform basically. The accuracy of the open wagon sidewall finite element model was verified. Based on structural stress method of ASME（ 2007） standard,the Miner linear cumulative fatigue damage theory and the AAR standard load spectrum,the critical welds fatigue life of open wagon sidewall were predicted and the results meet the design requirements.

关 键 词：敞车 侧墙 仿真模态分析 模态测试 结构应力法 疲劳寿命 

分 类 号：U272.2[机械工程—车辆工程]