摘要
为探究不同缓和曲线超高变化率对列车通过安全的影响,建立了车辆-轨道耦合动力学模型,得到不同超高变化率的的轮轨横向力与脱轨系数安全性指标。结果表明,(1)本文线路工况条件均满足安全性要求;(2)在相同的通过速度下,超高变化率越小,缓和曲线超高过渡的效果越好,越有利于提升列车通过的安全性;(3)轮轨横向力和脱轨系数最大值呈非线性增大的规律,这是因为列车受到轨道线路的综合线型条件的影响;(4)在实际工程中,应综合考虑平面线型及超高顺坡等线型条件,尽量降低缓和曲线的超高变化率,以改善曲线段的轮轨接触关系,提高列车通过的安全性。
To investigate the effects of varying superelevation transition rates on train passage safety,a vehicle-rail coupling dynamics model was developed,yielding lateral wheel-rail forces and derailment coefficient safety indices for different superelevation transition scenarios.The findings indicate:(1)Under the studied track configurations,all conditions meet safety requirements.(2)For a given passage velocity,smaller superelevation transition rates result in smoother superelevation transitions,thereby enhancing train passage safety.(3)The peak wheel-rail lateral forces and derailment coefficients exhibit a nonlinear increase,attributed to the combined influence of track alignment elements on the train’s dynamics.(4)It is advisable to consider both the planar alignment and superelevation gradients holistically in practice,striving to minimize superelevation transition rates along transition curves.This approach can improve the wheel-rail contact relationship in curved sections,ultimately boosting train passage safety.
作者
刘洋
LIU Yang(CRRC Xuzhou Railway Equipment Co.,Ltd.,Xuzhou 221100,China)
出处
《高速铁路技术》
2025年第3期62-67,共6页
High Speed Railway Technology
关键词
缓和曲线
超高变化率
列车
安全
transition curve
rate of superelevation change
train
safety
