【摘要】 为解决地铁钢轨异常波磨频发、常规手段难以根治的问题，探究轨道刚度及变形控制对波磨发展的影响机制，通过频响分析、参数敏感性分析及工程试验开展系统研究。选取多组扣件刚度参数，分析其对钢轨频响特性的调控规律；基于Sobol全局灵敏度指数方法，结合钢轨波磨增长模型识别关键影响参数；选取北京地铁某线路，采用“弹条Ⅱ型有螺栓扣件+高性能橡胶垫板”协同方案，开展动态变形控制设计与试验。研究结果表明：调节扣件刚度可优化轨道结构的振动特性，400 Hz左右的频段钢轨位移响应幅值逐渐随刚度增大而减小；轨道横向灵敏度是影响波磨发展的最敏感指标，其次为垂向灵敏度；改造后轨道横向刚度最大增幅可达32.21%，钢轨波深-峰值发展速率从0.036 mm/月降至0.017 mm/月，波磨发展得到有效抑制。该研究为地铁钢轨异常波磨治理提供理论支撑与工程实践方案。更多还原

【Abstract】 To address the issue of frequent occurrence of abnormal rail corrugation in metro and the difficulty of eradicating it with conventional methods, as well as investigate the influence mechanism of track stiffness and deformation control on corrugation development, research is carried out through frequency response analysis, parameter sensitivity analysis and engineering tests. Multiple sets of fastener stiffness parameters are selected to analyze their regulatory effects on rail frequency response characteristics. Based on the Sobol global sensitivity index method combined with a rail corrugation growth model, key influencing parameters are identified. A certain line of Beijing subway is selected to implement a coordinated scheme of “typeⅡelastic rail clip with bolted fasteners + high-performance rubber pad” for dynamic deformation control design and testing. The research results show that the adjustment of fastener stiffness could optimize the vibration characteristics of the track structure; the rail displacement response amplitude around 400 Hz gradually decreases with increasing stiffness; track lateral sensitivity is the most sensitive indicator affecting corrugation development, followed by vertical sensitivity; after modification, the maximum increase in track lateral stiffness reached 32.21%, and the development rate of rail corrugation peak depth-to-peak decreased from 0.036 mm/month to 0.017 mm/month, effectively restrains corrugation development. The research provides theoretical support and engineering practice solutions for managing abnormal rail corrugation in metro.更多还原