升力翼高速列车曲线通过时的轮轨黏着性能研究
Wheel-rail adhesion performance of high-speed trains with lift wings passing through the curved track
黄初贤 1王金能 1陈旸 1敬霖 1王开云1
作者信息
- 1. 西南交通大学轨道交通运载系统全国重点实验室,四川成都,610031
- 折叠
摘要
建立考虑轮轨关系、升力翼及流场耦合特性等因素的车辆系统动力学模型,分析升力翼高速列车曲线通过时的运动姿态和轮轨接触特性响应,研究列车在曲线轨道运行的轮轨黏着性能,探讨轨道不平顺、曲线半径、运行速度及轮轨接触条件对轮轨黏着性能的影响.研究结果表明:气动升力通过改变列车运行动态响应和轮轨接触特性导致内、外侧轮轨垂向力和纵向蠕滑力重新分配,促使内侧轮更易失去黏着;气动升力和运行速度的增大均会劣化轮轨黏着性能,但曲线半径的增大将显著提升轮轨黏着水平;轨道不平顺削弱了轮轨黏着性能,干态、湿态、油态条件下的轮轨黏着性能依次恶化.列车牵引运行时,干态、湿态、油态条件下的轮轨均能满足牵引力安全限值要求,但制动运行时,湿态和油态条件下的轮轨均不能满足制动力安全限值要求.研究结果可为超高速列车的安全运行与节能设计提供技术支持.
Abstract
A vehicle system dynamic model considering factors such as wheel-rail relationship,lift wings,and fluid-solid coupling characteristics was established.The motion attitude and wheel-rail contact characteristics of a high-speed train with lift wings passing curves were analyzed,and the wheel-rail adhesion performance during curve operation was studied.The effects of track irregularities,curve radius,train speed,and wheel-rail contact conditions on the wheel-rail adhesion performance were investigated.The results show that aerodynamic lift redistributes the vertical and longitudinal creep forces of the inner and outer wheels by changing the dynamic response and wheel-rail contact characteristics of the train,causing the inner wheel more likely to lose adhesion.Increasing aerodynamic lift and train speed both degrades the wheel-rail adhesion performance,but increasing the curve radius significantly improves the adhesion level.Track irregularities weaken the wheel-rail adhesion performance,and the adhesion level under dry,wet,and oily conditions deteriorates accordingly.When the train is in traction operation,circumstances in dry,wet and oily conditions can meet the safe limit of traction force requirement,but during braking operation,those circumstances in wet and oily conditions cannot satisfy the safe limit of braking force requirement.The research results can provide technical support for the safe operation and energy-efficient design of ultra-high-speed trains.
关键词
高速列车/升力翼/牵引/制动/曲线通过/轮轨黏着Key words
high-speed trains/lift wings/traction/braking/curve passing/wheel-rail adhesion引用本文复制引用
基金项目
国家重点研发计划(2020YFA0710902)
国家自然科学基金(12122211)
出版年
2024
国家科技期刊平台
NSTL
万方数据