B120型地铁铝合金车体疲劳寿命预测  

Fatigue life prediction for type B120 metro vehicle aluminum car body

作　　者：林文君[1] 李伟[1] 

机构地区：[1]中国南车集团株洲电力机车有限公司,湖南株洲412001

出　　处：《电力机车与城轨车辆》2007年第2期30-33,共4页Electric Locomotives & Mass Transit Vehicles

摘　　要：B120型地铁铝合金车体为整体承载全焊接结构,主要采用大型中空铝合金型材组焊而成。通过有限元方法对B120型地铁铝合金车体结构进行强度计算;选取典型线路的载荷谱,根据静强度计算的结果,折算出对应评估点应力幅;基于IIW标准,运用麦因纳疲劳累积损伤理论,对B120型地铁铝合金车体的关键点进行了疲劳寿命预测。The type B120 metro vehicle aluminum car body is overall load bearing structure, which is mainly made from large aluminum extrusions connected by welding. This paper calculates and analyzes the strength of the type B120 car body according to FEM. Through choosing typical load spectrum and the results of the static calculation,the stress range of the evaluating point is accessed. On the basis of IIW standard and Palmgren-Miner theory, the fatigue life of some key positions on the type B 120 car body are calculated.

关 键 词：地铁列车 铝合金车体 强度计算 载荷谱 IIW标准 疲劳寿命 

分 类 号：U270.32[机械工程—车辆工程]