摘要
文章旨在探索方案设计阶段评估高速货车关键零部件的疲劳寿命的方法。以新设计的高速货车转向架构架为研究对象,在方案设计完成后,依据柔性多体系统动力学建立构架为柔性体的柔刚耦合动力学模型。运用典型工况的动力学仿真,获得构架上动应力的分布和危险节点的动应力时间历程。依据线性疲劳损伤准则,按照全寿命周期的运用工况,评估新设计的构架的疲劳寿命。这样,在设计阶段就能发现方案的缺陷,减少开发成本和时间。
This paper aims to seek the method to evaluate the fatigue life of key parts and components of high speed freight cars in the scheme design stage.With the newly designed high speed freight car bogieframes as the object of research,after the scheme design,the rigid-flexible dynamics model with the flexible frame is set up on the basis of the flexible multi-body system dynamics.The dynamics simulation under typical working conditions is used to obtain the distribution of dynamic stresses on frames and the dynamic stress time history of dangerous nodal points.According to the linear fatigue damage hypothesis,on the basis of the working conditions of full life cycle operation,the fatigue life of newly designed frames is evaluated.Hence,the defects in the scheme can be found out in the design stage,the development cost and time can be reduced.
出处
《铁道车辆》
北大核心
2009年第12期5-8,共4页
Rolling Stock
关键词
高速货车
焊接构架
货车转向架
疲劳寿命
柔性多体系统动力学
high speed freight car
welding frame
freight car bogie
fatigue life
flexible multi-body system dynamics
