【摘要】 车轮多边形会造成轮轨冲击,对车辆、轨道零件造成破坏,严重影响列车运行的安全稳定性。以CRH3型车作为研究对象,建立动力学仿真模型,模型中将车轮考虑成刚性,将轨道视为柔性体,通过实测与仿真对比验证了模型;通过改变轮对的形状,研究谐波数、波深、车速对轮轨力的影响。研究结果表明,车轮多边形阶数、波深、车速对轮轨力影响较大,在车速为300km/h下波深0.14mm时出现跳轨,波深达到0.24mm时,轮轨力最大值超限。该研究结果为进一步研究轮轨关系、保证列车安全运行提供了理论支持。更多还原

【Abstract】 Polygonal wheel will cause wheel-rail impact and seriously affect the safety and stability of a train.In this paper,the CH3 car was taken as study object,a dynamic simulation model of the car was established.In the model,the wheel was considered as rigid,and the track was flexible.The model was validated by comparing simulation results with actual measurement data.By changing the shape of wheelset,the influences of harmonic number,wave depth and speed on wheel-rail force were studied.The results show that the wheel’polygon order,wave depth and train speed has a great influence on the wheel-rail force.When the train moves at speed of 300 km/h,the track jump occurs at the wave depth 0.14 mm.When the wave depth reaches 0.24 mm,the maximum value of wheel-rail vertical force exceeds the limit.This study may provide a theoretical basis for the study of the wheel rail relationship and the safe operation of the train.更多还原