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高速车轮椭圆化对车辆系统行为的影响

期刊名称：机械工程学报, 2010,46(16):67-73.(EI收录)
时间：0
分类：U211[交通运输工程—道路与铁道工程]
作者机构：[1]大连交通大学土木与安全工程学院,大连116028, [2]西南交通大学牵引动力国家重点实验室,成都610031
相关基金：国家自然科学基金（50821063 50875218）; 铁道部科技研究开发计划（2008J001-A 2009J001-A）资助项目
相关项目：复杂环境状态下高速列车动态脱轨机理的研究

关键词：高速列车, 车轮椭圆化, 车辆/轨道耦合动力学, 横向稳定性, 安全性, High speed train Wheel ovalization Vehicle/track coupling dynamics Lateral stability Safety

中文摘要：

建立考虑车轮椭圆化状态下的整车车辆/轨道空间耦合动力学模型,基于此模型,发展相应的数值方法,分析计算高速运行状态下车轮椭圆化程度对车辆系统动态行为的影响,给出车速200～350km/h时车体横移、轮对横移、轮轨垂向力和轮重减载率等关键指标,确定高速行车条件下车轮圆度的临界范围。数值结果分析表明,在车轮椭圆化的情况下,车辆系统动力学响应关键指标与行车速度、车轮的圆度以及轮对左右车轮椭圆形状的相位有密切联系。高速车轮椭圆化将导致车辆系统动力学性能的显著变化,随着车轮圆度的增大,车辆系统运行品质严重恶化,其横向稳定性和轮重减载率大大降低,从而减小车辆/轨道系统各部件使用寿命、增大脱轨风险。

英文摘要：

A coupling dynamics model of railway vehicle with oval wheels and track is built and a corresponding numerical method is developed.The effect of ovalization of the wheels on the dynamical behavior of the vehicle system is analyzed in details.The numerical results regarding the misalignments of the vehicle and wheelset,the dynamical normal loads of the wheels and the rails and the reduction in the wheelset loading are presented under the conditions in which the wheels are in ovalization and the train speed is from 200 km/h to 350 km/h.The limit of the wheel ovalization is determined according to the traditional criterion of wheelset loading reduction for safely running estimation.The results show that the dynamical behavior of the vehicle are much related to the wheel ovalization status（the difference between the maximum diameter and the minimum diameter of the elliptical wheel）,the phase between the elliptical shapes of the two side wheels and the train speed.The wheel ovalization under high speed greatly influences the vehicle behavior.The lateral motion ability and the running quality of the vehicle quickly reduce with an increasing in the wheel ovalization,and the dynamical normal load increases greatly.In such a situation,it is affirmed that the use lives of the parts of the vehicle and the track would be much reduced.And also the risk of derailment is increased largely.

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