地铁小半径曲线段非对称轨底坡对钢轨波磨的影响
孙萍1赵炎南2张博远1朱利强1刘凯3
Influence of Asymmetric Rail Cant on Rail Corrugation in Metro Small-radius Curve Sections
SUN Ping1ZHAO Yannan2ZHANG Boyuan1ZHU Liqiang1LIU Kai3
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作者信息:1.北京市地铁运营有限公司线路分公司， 100035， 北京
2.中国铁道科学研究院集团有限公司城市轨道交通中心， 100081， 北京
3.铁科院（北京）工程咨询有限公司， 100081， 北京
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Affiliation:1.Line Branch of Beijing Mass Transit Railway Operation Co.， Ltd.， 100035， Beijing， China
2.Urban Rail Transit Center， China Academy of Railway Sciences Group Co.， Ltd.， 100081， Beijing， China
3.Beijing Engineering Consultation Co.， Ltd.， China Academy of Railway Sciences， 100081， Beijing， China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.20252109
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中图分类号/CLCN:U211
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栏目/Col:土建工程
摘要:
［目的］ 合理的轨底坡可改善轮轨匹配关系，有效降低轮轨接触压力和减少轮轨磨耗，但目前鲜有从抑制钢轨波磨的角度进行轨底坡设置研究，也未见小半径曲线段内外轨非对称轨底坡对钢轨波磨影响的研究，为此对上述研究空白展开分析和讨论颇具价值和意义。 ［方法］ 通过力锤原点导纳测试获取钢轨横垂向位移导纳；基于车辆-轨道耦合多体动力学模型获取列车通过不同内外轨轨底坡配置下的轮轨接触参数，二者相结合计算得到不同轨底坡的钢轨波磨增长率指标；从预防钢轨波磨产生的角度研究轨底坡对钢轨波磨的影响规律。 ［结果及结论］ 基于粒子群算法多目标优化方法，得出小半径曲线段最优内外轨轨底坡配置内轨为1/40、外轨为1/22；该配置可实现对钢轨波磨的有效抑制，进而降低环境振动及车内噪声影响。
Abstracts:
［Objective］ A reasonable rail cant can improve the wheel-rail matching relationship， effectively reduce wheel-rail contact pressure and mitigate wheel-rail wear. However， current researches rarely address rail cant setting problems from the perspective of suppressing rail corrugation， and no studies have specifically examined the impact of asymmetric rail cant on inner and outer rails in a small-radius curve. Thus it is of value and significance to investigate and discuss the above research gap. ［Method］ Rail lateral and vertical displacement admittances are obtained through impact hammer origin point admittance test. A vehicle-track coupled multibody dynamics model is used to acquire wheel-rail contact parameters under different inner and outer rail cant settings. Through combination of both methods， the rail corrugation growth rate index for various rail cants is calculated. The influence law of rail cant on rail corrugation is analyzed from the perspective of preventing rail corrugation. ［Result Conclusion］ Using a multi-objective optimization method based on particle swarm algorithm， the optimal rail cant setting for small-radius curves is determined to be 1/40 for inner rail and 1/22 for outer rail. This setting effectively suppresses rail corrugation and significantly reduces environmental vibration and train interior noise issues.
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