地铁曲线段参数对钢轨波磨影响分析与打磨周期评估

Analysis of rail corrugation influenced by metro curve parameters and evaluation of grinding cycle

地铁线路具有曲线半径小、站间距离短等特点,列车运行时的频繁启动与制动会导致轮轨间相互作用进一步被恶化,加剧了钢轨波磨的同时也增加了城市噪声污染和行车风险.为研究波磨的产生规律,针对地铁曲线段钢轨打磨的各类影响因素,将地铁线路划分为多个连续的非均匀网格,结合钢轨线路历史打磨信息,建立基于可靠性理论的钢轨波磨的生存分析模型,量化各异质性因素对波磨的影响程度,并对打磨周期进行评估.结果表明:该模型能够评估不同异质性因素影响下钢轨波磨的打磨周期,对于指导地铁线路的养护维修具有一定现实意义.

Metro lines are characterized by small curve radii and short distances between stations.The frequent starting and braking during train operation can further worsen the wheel-rail interaction,exacerbating rail corrugation,and increasing urban noise pollution and driving risk.To evaluate the risk of rail corrugation and understand the law of its generation,the line is divided into many continuous nonuniform grids.By combining this with historical rail grinding data,a survival analysis model based on reliability theory is developed to evaluate the impact of various risk factors on the grinding cycle of rail corrugation.The findings indicate that the model can estimate the grinding cycle of rail corrugation under the influence of various risk factors,which is of practical significance for guiding maintenance of subway lines.