钢轨扣件弹条扣压力对轮轨系统垂向动力学响应的影响分析

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (24) : 17-24.

论文

袁玄成，朱胜阳，袁站东，翟婉明

作者信息 +

Influence of rail fastener clamping force on vertical dynamic responses of wheel/rail system

YUAN Xuancheng，ZHU Shengyang，YUAN Zhandong，ZHAI Wanming

Author information +

文章历史 +

摘要

为深入探讨钢轨扣件弹条扣压力对轮轨系统垂向动力学响应的影响，在经典车辆－轨道垂向耦合动力学模型的基础上细化了扣件的建模，建立了能够考虑钢轨扣件弹条扣压力和轨下胶垫初始压缩量的垂向动力学模型。针对轨下胶垫和弹条的实际受力情况，模型中采用具有单向作用特性的力元来模拟轨下胶垫和弹条的受力特性。通过数值仿真，将本文模型与传统模型进行了对比，并分析了弹条扣压力衰减和扣压力失效对轮轨系统垂向动力学响应的影响。分析结果表明，弹条扣压力衰减主要导致胶垫支反力减小，而扣压力失效则会导致失效扣件处的钢轨垂向加速度显著增大。对于连续多个扣件发生扣压力失效的情况，钢轨垂向加速度、钢轨上拱位移和轮对垂向加速度等动力学指标随失效扣件个数的增加而增大，而失效扣件个数的增加对轮轨垂向力、轮载作用下的钢轨垂向位移和胶垫支反力的变化影响很小。

Abstract

Aiming at deepening the understanding of how rail fastener clamping force influences wheel/rail system vertical dynamic responses, an elaborated vertical dynamics model has been set up.The model was established based on the classic vehicle-track vertically coupled dynamics model, and was able to consider fastener clamping force and rail pad precompression.To reflect the actual force states of the spring clip and rail pad, the force elements with unidirectional action characteristics were implemented into the model.By numerical simulations, the proposed model and traditional model have been compared, and the analyses on how clamping force reduction and the amount of clamping force failure fasteners influence the vertical dynamic response of wheel/rail system have been carried out.Analysis results indicate that the reduction of clamping force mainly result in the reduction of rail pad reaction force while clamping force failure mainly leads to a sharp increase of vertical rail acceleration at the position where the clamping force fails.For the case of continuous multiple clamping forces failure, the vertical rail acceleration, upward rail displacement and vertical wheelset acceleration all increase as the amount of failure fasteners increases, while vertical wheel/rail force, vertical rail displacement under wheel load, and rail pad reaction force are hardly influenced by the amount of failed fasteners.

导出引用

袁玄成，朱胜阳，袁站东，翟婉明. 钢轨扣件弹条扣压力对轮轨系统垂向动力学响应的影响分析[J]. 振动与冲击, 2020, 39(24): 17-24

YUAN Xuancheng，ZHU Shengyang，YUAN Zhandong，ZHAI Wanming. Influence of rail fastener clamping force on vertical dynamic responses of wheel/rail system[J]. Journal of Vibration and Shock, 2020, 39(24): 17-24

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