Structure analysis and optimization of rail-breaking emergency device for heavy-haul railway
When the heavy-haul railway suffers the rail fracture accidents,the emergency device can be used to clamp the broken rail to ensure the railway's safe transportation in a short time.In order to make the rescue more convenient,this emergen-cy device should be optimized based on the original design.In this article,with the focus on the Daqin Line heavy-haul railway's rail,the finite-element model is set up with the help of the ABAQUS software to explore the influencing factors of the emergency device's safety and determine the most unfavorable working conditions;then,the scheme is optimized and verified.The results show that the stress of the emergency splint and the bolt decreases linearly in the cubic polynomial form,with the load point mov-ing away from the position where rail breaking occurs.Both the stress and the displacement of the emergency splint and the bolt change with the temperature,which are greater at-40 ℃ of low temperature than those at 50 ℃ of high temperature.By chan-ging the bolt's size and the splint's materials,while meeting the strength requirements,both the optimal combination and the range of the ambient temperature for safe operation are determined.
rail breakingemergency splintoptimizationvertical forcetransverse force
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NSTL
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