摘要
在JD—1轮轨模拟试验机上进行轮轨在干态工况突然加水和水介质条件下的黏着特性试验,着重研究水介质条件下不同速度、轴重以及蠕滑率对轮轨黏着的影响。结果表明：在相同的蠕滑率下,干态工况加水之后轮轨间的黏着系数较干态时的黏着系数降低了50%-60%;在水介质条件下,不论是最大黏着值还是稳定黏着值（机车实际运行黏着区）,受车轮速度影响较大,黏着系数随着车轮速度的上升而降低,轴重对黏着系数的影响较小;黏着系数在达到最大值（饱和值）之前随蠕滑率的增加而线性增加,而后随蠕滑率的增加而下降,最后逐渐趋于稳定。最大黏着系数所对应的蠕滑率为0.5%左右。
The adhesion property of under dry condition when suddenly adding water and under water condition between wheel and rail were tested separately on JD1 wheel/rail simulation machine.The effect of speed,axle load and creepage on wheel/rail adhesion coefficient under water condition was mainly investigated.The results indicate that,compared with the dry condition,the adhesion coefficient decreases 50%～60% when adding water between wheel and rail under dry condition.When under water condition,the wheel speed mainly affects not only the maximum adhesion value but also the steady adhesion value（the adhesion section at which the locomotive runs）,the adhesion coefficient declines while the wheel speed becomes higher,however,the axle load has less effect on it.As the creepage increases,the adhesion coefficient increases linearly before it reaches the maximum value（saturation value）,after which the coefficient declines slightly and gradually becomes stable at last.When the creepage reaches to about 0.5%,the maximum adhesion coefficient appears.
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2010年第3期52-56,共5页
China Railway Science
基金
国家自然科学基金资助项目(50905148)
国家"九七三"计划项目(2007CB714702)
国家重点实验室自主研究课题资助项目(2008TPL-Z09)
关键词
黏着系数
蠕滑率
速度
轴重
水介质
轮轨关系
Adhesion coefficient
Creepage
Speed
Axle load
Water condition
Wheel rail relation
