铁道车辆液压减振器非线性特性试验与动力学仿真  

Nonlinear Characteristic Test and Dynamics Simulation of Hydraulic Damper for Railway Vehicles

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作  者:刘晨 石怀龙[1] 邬平波[1] LIU Chen;SHI Huailong;WU Pingbo(State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China)

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

出  处:《机械制造与自动化》2021年第6期84-89,共6页Machine Building & Automation

基  金:国家自然科学基金资助项目(51805451,U1934202,1970282);中央高校基本科研业务费项目(2682019CX43);四川省科技计划项目(2020YJ0074)。

摘  要:基于Maxwell模型推导出二系横向减振器和抗蛇行减振器的动态刚度和阻尼等非线性特性,对其分别进行温变特性和动静态特性试验,并基于车辆动力学仿真得出抗蛇行减振器参数对蛇行运动稳定性和运行平稳性的影响规律。结果表明:温变特性试验中的示功图、阻尼偏差率等数据验证了减振器基本参数符合设计要求;减振器动态特性与加载频率和位移幅值相关。针对某高速列车,提高抗蛇行减振器串联刚度或提高其卸荷力,可改善构架蛇行运动稳定性和行车的平稳性、舒适性,但提高其卸荷速度却起到反作用,一般需要取最优值范围。The nonlinear characteristics such as dynamic stiffness and damping of the secondary transverse damper and the anti-snaking damper is derived based on the Maxwell model.Tests on temperature variation characteristics and tatic and dynamic characteristics are conducted respectively.The influence law of the anti-snaking damper parameters on the stability of the snake movement and running stability is abtained based on vehicle dynamics simulation.The results show that the indicator diagram and the damping error rate in the temperature variation characteristic test verify that the basic parameters of the shock absorber meet the requirements of the design value,the dynamic characteristics of shock absorber are related to the loading frequency and displacement amplitude.For a high-speed train,increasing the series stiffness of anti-snaking damper or increasing its unloading force will improve the stability of the frame snaking movement and the smoothness and comfort of running,while increasing its unloading speed will have a negative effect,and the optimal value range in general should be taken.

关 键 词:铁道车辆 液压减振器 二系悬挂 台架试验 动力学模型 

分 类 号:U270.1[机械工程—车辆工程]

 

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