新型扇形轮轨接触损伤模拟试验台研究
2021-09-18翟字波尧辉明董庆仑
翟字波 尧辉明 董庆仑



摘 要:针对轮轨接触损伤模拟装置进行研究,设计一种接近于实际工况的新型轮轨接触损伤模拟试验台,通过轮对驱动系统与中央驱动系统双驱动形式,实现控制模拟纵向蠕滑率与运行工况,通过相似定理计算了小比例试验台结构参数与蠕滑力相似关系,理论计算了最小曲线通过半径为0.679m,最大脱轨系数为0.67,蠕滑力相似性误差低于10%。验证了新型试验台的实用性与安全运行要求。
关键词:轮轨接触;蠕滑率;模拟试验;相似原理
中图分类号:U270.1 文献标识码:A
Abstract: A new type of wheel rail contact high-frequency vibration test-bed is designed based on the research of wheel rail contact damage simulation device, which is close to the actual working condition. The longitudinal creep rate and operating condition are controlled and simulated through the dual driving form of wheelset driving system and central driving system. The similarity relationship between the structural parameters and creep force of the small scale test-bed is calculated through the similarity theorem, and the minimum creep force is calculated theoretically. The radius of the curve is 0.679m, the maximum derailment coefficient is 0.67, and the similarity error of creep force is less than 10%. The practicability and safe operation requirements of the new test-bed are verified.
Key words: wheel rail contact; creep rate; simulation test; similarity principle
轨道交通凭借可持续、经济、环保等优点,已成为现在社会的重要交通工具。轮轨接触损伤问题也日益严重,为此国内外学者根据产生机理与预防措施做了大量研究。轮轨磨损研究分为理论仿真研究、现场实验研究与实验装置研究,理论仿真研究相较于实验研究存在误差,现场实验研究又具有难度,因此国内外学者针对试验台试验验证方法对轮轨关系开展了研究[1-7],其中大多采用轮轮接触模拟的方式,这种方式虽能较好的模拟轮轨接触试验,但在接触关系、接触斑特性上相较于轮轨接触存在差距[8]。目前针对轮轨接触模拟试验研究较少,若在室内搭建轮轨接触模拟试验台,可较为真实还原列车运行时的动力学性能,也可基于轮轨损伤的原因有针对性地展开各参数进行正交试验。基于此,本文设计了一款小比例扇形轮轨接触损伤模拟试验台。……
