열차제동하중이 레일표면열화에 미치는 영향
Effects of Train Braking Force on the Degradation of Rail Surface
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참고문헌
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초록
In urban railways where the distance between stations is short and the interval of train dispatch is short, rail surface defects occur more frequently in the station area than in the train travel area. In this study, the finite element analysis simulating the frictional heat generated by the braking force of the train was performed and the rolling contact fatigue damage rate was analyzed by deriving the stress in the rail according to the braking force of the train. The maximum stress at 6.8mm from the rail surface and the increase of the braking force to 100, 200 and 300% compared to when the train traveled at 100km/h resulted in the rolling contact fatigue damage on the rail surface Increased about 6~28%, and increased about 3~12% at the depth of about 6.8mm from the rail surface. Therefore, the rail grinding operation to control the degradation of the rail surface caused by the contact between the wheel and the rail is proposed to distinguish between the train travel zone and the braking zone.
Abstract
In urban railways where the distance between stations is short and the interval of train dispatch is short, rail surface defects occur more frequently in the station area than in the train travel area. In this study, the finite element analysis simulating the frictional heat generated by the braking force of the train was performed and the rolling contact fatigue damage rate was analyzed by deriving the stress in the rail according to the braking force of the train. The maximum stress at 6.8mm from the rail surface and the increase of the braking force to 100, 200 and 300% compared to when the train traveled at 100km/h resulted in the rolling contact fatigue damage on the rail surface Increased about 6~28%, and increased about 3~12% at the depth of about 6.8mm from the rail surface. Therefore, the rail grinding operation to control the degradation of the rail surface caused by the contact between the wheel and the rail is proposed to distinguish between the train travel zone and the braking zone.
참고문헌 (12)
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