摘要
为提升车辆通过高速道岔时的运行平稳性,基于迹线法建立车轮与道岔钢轨接触几何计算模型,分析车辆通过道岔转辙器时的轮轨接触点对分布特性,发现轮轨接触位置不集中和突变是降低车辆运行平稳性的主要因素。以降低接触突变幅度为原则提出转辙器钢轨廓形打磨方案,并基于轮轨接触几何模型和车辆-道岔多刚体动力学模型,对道岔钢轨打磨的效果进行研究。结果表明:钢轨廓形打磨能有效降低道岔区轮轨接触不平顺和等效锥度,利于提升车辆的运行平稳性;打磨后轮轨横向力、车体横向加速度、脱轨系数的最大值分别降低了39.5%、7.4%、41.7%,该廓形打磨方案对提升道岔服役性能效果明显。
In order to improve the running stability when the vehicle passes through the high speed turnout,the contact geometric calculation model between the wheel and the turnout rail was established based on the trace method,and the distribution characteristics of the wheel rail contact point pair were analyzed when the vehicle passes through the turnout switch. It is found that the non-concentration and mutation of the wheel rail contact position are the main factors to reduce the running stability of the vehicle. Based on the principle of reducing the mutation range of contact,the grinding scheme of rail profile of switch was proposed,and the grinding effect of turnout rail was studied based on wheel rail contact geometric model and vehicle-turnout multi rigid body dynamic model. The results show that rail profile grinding can effectively reduce the wheel rail contact irregularity and equivalent taper in the turnout area,and improve the running stability of vehicles. After grinding,the maximum values of wheel rail lateral force,vehicle body lateral acceleration and derailment coefficient are reduced by 39.5%,7.4% and 41.7% respectively. The profile grinding scheme has an obvious effect on improving the service performance of turnout.
作者
王健
WANG Jian(Railway Line and Station Yard Design Department,China Railway Design Corporation,Tianjin 300308,China)
出处
《铁道建筑》
北大核心
2022年第1期31-34,共4页
Railway Engineering
基金
中国铁路设计集团有限公司重点课题(2021A240107)。
关键词
高速道岔
转辙器
钢轨打磨
打磨方案
运行平稳性
轮轨接触关系
轨道不平顺
high speed turnout
switch
rail grinding
grinding scheme
running stability
wheel-rail contact relationship
track irregularity
