铁路凹底平车凹底架动态响应及其疲劳强度  

Dynamic Response and Fatigue Strength of Depressed Center Flat Frame

作　　者：谢基龙[1] 张燕[1] 谢云叶[1] 

机构地区：[1]北京交通大学轨道车辆结构可靠性与运用检测技术教育部工程研究中心,北京100044

出　　处：《机械工程学报》2010年第16期16-22,共7页Journal of Mechanical Engineering

摘　　要：将有限元分析方法与多体系统动力学理论有机地结合在一起,应用于凹底平车多体系统的动态响应分析、凹底架的弹性振动分析和疲劳强度研究中。在进行轮轨接触、轨道谱以及车辆系统非线性因素等的计算、模拟基础上,基于有限元分析软件ANSYS,采用超单元法建立凹底架弹性体动力学方程。把有限元分析结果引入到SIMPACK动力学软件中,进而建立凹底平车的多刚体系统和刚柔耦合系统动力学模型,进行仿真计算并与试验结果对比分析,研究运行速度和悬挂参数对车辆系统动态响应的影响规律,分析凹底架的动态限界和凹底架的疲劳强度问题。分析得出,刚柔耦合多体系统动力学模型更合理。计算结果表明,重车运行过程中速度不宜过高,并要合理匹配悬挂参数,避免凹底架下平面超限界和过早疲劳破坏。Based on finite element method and multi-body system dynamics theory,the dynamic response of depressed center flat car multi-body system,the fatigue life and elastic vibration of its depressed center flat underframe are studied.After the wheel-rail contact,track spectrum and vehicle nonlinear factors being calculated and simulated,the dynamic equations of depressed center flat underframe are established by using super-element method based on finite element analysis software ANSYS.The finite element analysis results are introduced into the dynamics software SIMPACK,and the multi-rigid-body system and rigid-flexible coupling system dynamics models of the depressed center flat car are established.Simulation calculation is carried out,then compared with the test result to study the effects of running speed and suspension parameter on the dynamic response of vehicle system.The dynamic clearance and fatigue strength of depressed center flat underframe are also analyzed.The results show that the rigid-flexible coupling model is more reasonable.The running speed of the loaded car should not be too high,and suspension parameters should be properly matched.

关 键 词：凹底平车 刚柔耦合多体系统 有限元分析 动态响应 疲劳寿命 

分 类 号：U272.6[机械工程—车辆工程]