小半径及大坡度地段直线电机车辆轮轨动力学特性探究
Exploration on wheel-rail dynamic behavior of linear motor vehicles in small radius and large gradient sections
张利 1张佩竹 1郝晓成1
作者信息
- 1. 中铁第六勘察设计院集团有限公司,天津 300308
- 折叠
摘要
直线电机车辆具有转弯半径小、爬坡能力强等特点,在城市轨道交通加密线中有独特优势.文章以北京市轨道交通28号线为例,建立直线电机车辆-轨道-道床耦合动力学模型,分析车辆通过小半径及大坡度地段的动力学响应.分析结果表明,曲线半径对车体垂向加速度影响并不显著.行车速度80 km/h地段,曲线半径不宜小于400 m.曲线半径减小时,轮轨力、脱轨系数以及轮重减载率峰值均随之增大.坡度增大时,车体垂向加速度峰值增大.不同坡度下的车体横向加速度、轮轨力、脱轨系数、轮重减载率峰值基本相同.因此可得,直线电机车辆适合在小半径及大坡度地段运行.
Abstract
Linear motor vehicles have the characteristics of small turning radius and strong climbing ability,which have unique advantages in the density-enhancing lines of urban rail transit.Taking Beijing rail transit line 28 as an example,this article establishes a linear motor vehicle-railway-roadbed coupling dynamics model,and analyzes the kinetic response of the vehicle through the small radius and large gradient sections.The analysis results show that the curve radius has no significant effect on the vertical acceleration of the vehicle body.In sections with a driving speed of 80 km/h,the curve radius should not be less than 400m.When the curve radius decreases,the wheel-rail force,the derailment coefficient,and the peak wheel-weight reduction rate would all increase accordingly.When the gradient increases,the peak vertical acceleration of the vehicle body increases.The lateral acceleration,wheel-rail force,derailment coefficient,and peak wheel-weight reduction rate are basically the same for different gradients.Therefore,it can be concluded that linear motor vehicles are suitable for the operation in small radius and large gradient sections.
关键词
城市轨道交通/直线电机车辆/小半径曲线/大坡度/动力学响应Key words
urban rail transit/linear motor vehicle/small radius curve/large gradient/kinetic response引用本文复制引用
出版年
2024
NETL
NSTL
万方数据