Mechanical Characteristics of 60 kg/m Rail No.12 Seamless Turnouts of Golmud-Korla Railway in Xinjiang Plateau Region
This article is based on the seamless track transformation project of the plateau region of the Xinjiang section of the Golmud-Korla Railway.By establishing a finite element model of the No.12 seamless turnouts with 60 kg/m rails the distribution patterns of temperature stress and displacement of the seamless turnout under temperature variations were analyzed,thereby revealed the influence of the amplitude of rail temperature change on the force and deformation of the seamless turnout.The results show that the additional temperature force on the basic rail is mainly concentrated within the area from 10m before the turnout to 30 m after the turnout.Within the range of rail temperature change at 50～65℃,the increased range of the additional temperature force is at 19.3%～23.1%,and the expansion displacement of the actual point of switch rail is maintained in the range of 0.2～0.4 mm/℃.When the rail temperature reaches about 38℃,the male and female blocks of the rail stopper begin to abut against each other,and the load growth rate is about 10 kN/℃.It is recommended to establish a health monitoring system for seamless turnouts and strengthen maintenance and repair to ensure that seamless turnouts are in good service condition.
mixed passenger and freight railwaymechanical characteristicsnumerical simulationseamless turnoutfinite element modeltemperature stress
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