动载系数对160km/h货车转向架焊接件疲劳损伤的影响  

Effect of Dynamic Load Coefficients on Fatigue Damage of Welded Components for 160 km/h Wagon Bogie

作　　者：周张义[1,2] 李芾[2] 黄运华[2] 安琪[2] 李志强 潘树平 

机构地区：[1]西南交通大学力学与工程学院,四川成都610031 [2]西南交通大学机械工程学院,四川成都610031 [3]眉山车辆有限公司产品开发部,四川眉山620032

出　　处：《西南交通大学学报》2010年第4期544-548,共5页Journal of Southwest Jiaotong University

基　　金：国家科技支撑计划资助项目(2007BAG05B06)

摘　　要：为了验证160 km/h货车转向架焊接部件的疲劳强度,依据UIC510-3标准规定的疲劳试验载荷确定方法和IIW提供的焊接接头疲劳强度S-N曲线,应用结构有限元技术及Palmgren-Miner线性累积损伤准则,对焊接构架及摇枕主结构危险焊缝接头进行了疲劳损伤数值仿真分析.结果表明:侧滚动载系数变化对疲劳损伤影响较小,浮沉动载系数变化对疲劳损伤影响显著.在对焊接构架和摇枕进行疲劳试验验证时,侧滚动载系数可直接取标准值0.22,浮沉动载系数应比标准值0.30适当增大,可初步取为0.33.In order to verify the fatigue strength of welded components for 160km/h wagon bogie,a numerical simulation for the fatigue damage of dangerous welded joints in the main structures of the welded frame and bolster was made using structural finite element method（FEM） and Palmgren-Miner linear cumulative damage rule,in accordance with the determination method of fatigue test loads stated in UIC510-3 and the welded joints fatigue strength S-N curves provided by International Institute of Welding（IIW）.The results show that the roll coefficient change has little effect on fatigue damage,while the bounce coefficient change has remarkable effect on fatigue damage.When carrying out fatigue tests of welded frame and bolster for strength verification,the roll coefficient can be taken as the standard value 0.22 directly,the bounce coefficient should be larger than the standard value 0.30,and is recommended to be 0.33 preliminarily.

关 键 词：动载系数 160km/h货车转向架 焊接部件 疲劳损伤 有限元法 

分 类 号：U270.12[机械工程—车辆工程]