摘要
为明确在排雪横截面不变时某型出口欧洲动车组的排雪特性与排障面板几何构型之间的关联关系,指导积雪加载条件下排障面板拓扑构型设计,运用光滑粒子流体力学方法构建动车组冲击轨道松软积雪数值模型,开展不同前角和张角排障面板在冲击积雪过程中飞雪运动形态、排雪阻力和能耗功率分析。研究结果表明,被排除积雪在空中的飞扬形态与排障面板前角与张角密切相关,调整排障面板前角与张角可调整飞雪z方向的飞扬高度和x方向的速度,从而避免空中飞扬的积雪阻挡司机视线,保障动车组安全运行;排障面板前角对动车组x方向排雪阻力影响较小,但可改变z方向排雪阻力的大小和方向;排障面板张角增大会导致x方向排雪阻力增大,z方向排雪阻力先增大后减小;动车组排雪能耗、功率与排障面板前角关联性较小,与排障面板张角呈正相关关系,减小排障面板张角可有效减小排雪能耗和功率,达到减载降负和节能效果。
This paper aims to clarify the relationship between the snow-removal characteristics of an EMU mode intended for export to Europe and the geometrical configuration of its obstacle deflector panels,while maintaining a consistent snow-removal cross-section,and guide the topological configuration design for these panels to ensure their effectiveness under snow loading.A numerical model describing the impact of the EMUs on accumulated snow on tracks was constructed,using the smoothed particle hydrodynamics method.This model was then utilized to analyze snow movement,snow-removal resistance,energy consumption power under various rake and flare angles of the obstacle deflector panels.The results reveal a close relationship between snow movement and the rake and flare angles.Adjusting these angles can affect the height of snow movement in the z direction and the speed in the x direction,thereby preventing flying snow from blocking the driver's sight and ensuring the safe operation of the EMUs.The rake angle is found to influence both the magnitude and direction of z-directional snow-removal resistance,despite having little effect on x-directional snow-removal resistance.As the flare angle increases,x-directional snow-removal resistance increases,whereas z-directional snow-removal resistance first increases and then decreases.Moreover,the snow-removal energy consumption and power of the EMUs exhibit low correlations with rake angles of the obstacle deflector panels and positive correlations with flare angles.Therefore,reducing flare angles can effectively decrease snow-removal energy consumption and power,leading to load reduction and energy conservation.
作者
张华海
陆军
熊伟
由天宇
申路民
ZHANG Huahai;LU Jun;XIONG Wei;YOU Tianyu;SHEN Lumin(State Key Laboratory of Heavy-duty and Express High-power Electric Locomotive,Zhuzhou,Hunan 412001,China;Key Laboratory of Traffic Safety on Track Ministry of Education,Central South University,Changsha,Hunan 410083,China)
出处
《机车电传动》
2024年第4期72-79,共8页
Electric Drive for Locomotives
基金
重载快捷大功率电力机车全国重点实验室开放课题(2016YFB1200501)。
关键词
动车组
排障面板
积雪
排雪特性
EMU
obstacle deflector panel
snow
snow-removal characteristic
