Analysis of Runaway Prevention Effect of Anti-Slip Shoes Applied to Different Sections in Wind-Prone Area under Heavy Load Conditions
In order to study the runaway problem of heavy-haul train formations in adverse stopping conditions such as high winds and heavy snow,a simulation model of anti-slip C80E freight car is established,and the braking resistance values of anti-slip shoes under different wind speeds,gradients and climate conditions.The mechanical model of heavy-haul train formations stopping on the ramp is established,and under the premise that the train formation,without braking force,will not run away due to the combined effects of the wind force,the braking resistance of the anti-slip shoes and the basic startup resistance of the train,the number of formation units that each shoe can prevent from runaway under different circumstances is determined,and the field operational guidelines are determined.The results show that when the shoes are set under the wheels of the C80E freight car under full load,the braking resistance with the minimum friction coefficient is 12.57 kN,and the braking resistance with the maximum friction coefficient is 77.68 kN.The maximum number of formation units that each shoe can prevent the train from runaway:under the maximum allowable stopping gradient of 6‰and snow conditions,every two cars need to be equipped with one shoe;under a 10 longitudinal wind,each car needs to be equipped with one shoe.
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