考虑整车动力学特性的高速列车车体结构疲劳仿真  

High-speed Train Carbody Structure Fatigue Simulation Based on Dynamic Characteristics of the Overall Vehilce

作　　者：缪炳荣[1] 张立民[1] 张卫华[1] 尹海涛[2] 金鼎昌[1] 

机构地区：[1]西南交通大学牵引动力国家重点实验室,四川成都610031 [2]西南交通大学机械工程学院,四川成都610031

出　　处：《铁道学报》2010年第6期101-108,共8页Journal of the China Railway Society

基　　金：国家重点基础研究发展计划(973计划)(2007CB714705);中央高校基本科研业务费专项资金(SWJTU09CX061);铁道部科技研究开发计划(2009J006-F)

摘　　要：高速列车车体的结构疲劳问题,关键还是轻量化设计导致的强度、刚度和寿命变化后产生的问题。论文提出一种新混合模拟技术,主要是结合多学科优化系统理论,采用并行优化算法,进行结构疲劳可靠性设计。核心是利用多体动力学和有限元法混合模拟技术在进行结构疲劳设计时考虑整车动力学特性,分析线路典型工况下结构振动特性和结构疲劳损伤之间的作用机理,考虑典型载荷工况和其他不确定因素影响。并且采用随机统计概率方法和多目标优化手段进行结构疲劳设计。以某型高速车体结构作为算例,并通过试验验证。仿真计算结果表明,这种方法可以从整车动态特性的角度系统研究车辆振动特性和结构疲劳性能之间的相互作用机理,还可以及时有效地解决工程结构疲劳设计优化的问题。The key to structural fatigue of the high-speed train carbody is the change of the strength,rigidity and life caused in lightweight design.This paper presents a new hybrid simulation technology that combines multi-disciplinary optimization system theories and use the parallel optimization algorithms in structural fatigue reliability design.The core is to take into account the dynamics characteristics of the overall carbody by using the hybrid simulation techbology of multi-body dynamics and the finite element method, the core is to analyze the acting mechanism between structure vibration characteristics and structure fatigue damages under typical line operation conditions, and the core is to include the influence of typical loading cases and other uncertain factors.The random statistical probability method and the multi-objective optimization method are also employed.One type of the high-speed train carbody structure is used as an example for tests and verification.The simulation results show that the new method serves to study the interaction mechanism between the vehicle vibration characteristics and structure fatigue performance from the point of the dynamic characteristics of the overall vehicle and to solve the problems in optimization of engineering structures fatigue design.

关 键 词：高速铁路 车体结构 多体系统 有限元法 结构疲劳 

分 类 号：U270.12[机械工程—车辆工程]