摘要
提速轨道车辆需要开展轮轨关系改进与提速转向架动态设计MBS协同仿真研究,正确处理(非)线性的辩证关系,努力维系轮对自稳定理想状态。CRH5转向架仅凭XP55踏面就实现了轨底坡由1∶20到1∶40的轨道参数转变,因而安全稳定裕度不充裕是其引进转化所遗留的1个固有技术问题。但是改用XP55踏面也带来了诸多技术效果,如低磨耗区域拓宽至16 mm并使磨耗轮轨局部密贴型接触的发生概率降低。在经常性的横风扰动下,轮轨匹配及动态仿真分析表明:钢轨轨头打磨修型至60N处理削弱了因上述轮轨关系改进设计所带来的技术效果,进而成为了防风沙动车组CRH5G产生磨耗振动的直接原因。为了增强抵御极端气候影响的稳定鲁棒性能,制订了抗蛇行参数优配方案,明确了CRH5的技改方向。
In the researches and developments of speeding-up railway vehicles,it is necessary to carry out the collaborative MBS simulations on the wheel-rail relationship improvements and speeding-up bogie dynamical design,to transact correctly the dialectical relationship of(non-)linearities and maintain the ideal state of wheelset self-stability.The CRH5 bogies transform the rail parameters of rail cant from 1∶20 to 1∶40 by applying the XP55 tread alone,and the deficient safety and stability margin has therefore been an inherent problem since their technical importations and absorptions.However,the use of XP55 tread also brings many technical effects,such as widening of the low wear area to 16 mm and the probability reduction of local conformed contacts between worn wheel and rail.Under the frequent cross-wind disturbances,both wheel-rail matching and dynamic simulation analyses show that the grinding of rail head to 60N weakens the beneficial effects of the improved wheel-rail relationship design,which becomes then the direct cause of wear vibration problem produced by the anti-wind/sand trainsets,CRH5G.To enhance the stability and robustness against extreme climate influences,the optimal configuration scheme of anti-hunting parameters was formulated,defining clearly the CRH5 innovation or renovation direction.
作者
李特特
王琪斌
朴明伟
Li Tete;Wang Qibin;Piao Mingwei(School of Mechanical Engineering,Dalian Jiaotong University,Dalian 116028,China)
出处
《华东交通大学学报》
2021年第2期103-109,共7页
Journal of East China Jiaotong University
基金
国家重点研发计划项目(2017YFB1201302)。
关键词
提速轨道车辆
轮对自稳定性
MBS仿真
车轮有害踏面磨耗
speeding-up railway vehicles
wheelset self-stability
multi-body system simulations
detrimental wears of wheel tread
