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无砟道岔结构横移是高速铁路轨道出现的典型病害之一,导致了多处列车限速运行。本文以客运专线18号可动心轨道岔为例,运用多体动力学软件建立车辆-道岔耦合动力学模型,分析了无砟道岔结构横移量对车辆动力特性的影响,并对横移病害整治方法进行了研究。结果表明:无砟道岔结构横移会产生方向不平顺,导致轮轨横向力、脱轨系数及车体横向振动加速度大幅增加;直、逆向过岔时,辙叉区横移对车辆动力特性的影响大于转辙器部分,而转辙器部分横移会持续影响车体通过辙叉区的横向加速度;采用抬升推移法对岔区无砟轨道结构进行调整时,底座板与基床表层之间的黏结力对顶推力的影响大于轨道结构刚度。
The non-crossing turnout structure is one of the typical diseases occurred in the high-speed railway track, resulting in a number of train speed limit operation. Taking the 18th movable rail turnout on Passenger Dedicated Line as an example, the dynamics model of the vehicle - turnout coupling is established by using multi - body dynamics software. The influence of the amount of transverse movement of the turnout on the vehicle dynamic characteristics is analyzed. Methods were studied. The results show that the transverse displacement of the ballastless turnout will result in an irregular direction, resulting in a significant increase of the wheel-rail lateral force, the derailment coefficient and the lateral acceleration of the vehicle body. The influence of the transverse frog transfer on the vehicle dynamic characteristics during straight and reverse turnouts Which is greater than the part of the switch and the part of the switch will continue to affect the lateral acceleration of the vehicle passing through the frog zone. When the ballastless track structure is adjusted by the lift-and-push method, the distance between the base plate and the surface of the bed The effect of cohesion on thrust force is greater than that of track structure.