融合周期成分的高速铁路轨道谱表征反演方法及应用  

Track spectrum characterisation and inversion method with application of high-speed railway incorporating periodic components

作　　者：刁洪宝 高彦嵩 赵钢 杨飞 DIAO Hongbao;GAO Yansong;ZHAO Gang;YANG Fei(Infrastructure Inspection Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;Technology and Information Department,China Railway,Beijing 100844,China;Infrastructure Inspection Center,China Railway,Beijing 100081,China)

机构地区：[1]中国铁道科学研究院集团有限公司基础设施检测研究所,北京100081 [2]中国国家铁路集团有限公司科技和信息化部,北京100844 [3]中国国家铁路集团有限公司铁路基础设施检测中心,北京100081

出　　处：《铁道科学与工程学报》2024年第10期3921-3933,共13页Journal of Railway Science and Engineering

基　　金：国家重点研发计划(2022YFB2603400);中国国家铁路集团有限公司科技研究开发计划(P2021T013);铁科院科技研究开发计划(2021YJ022)。

摘　　要：随着线路服役期增加及运营速度提升,由于轨下基础结构变形产生的周期性不平顺问题及其影响愈发严重。目前国内外针对长区段周期不平顺状态评价方法的研究相对较少,为了实现对线路长区段轨道周期性不平顺状态的表征及反演,分析高速铁路不同轨下基础轨道周期不平顺特征,研究了基于轨道谱的周期成分表征及量化评价方法。首先,基于非线性最小二乘法,对比高斯、洛伦兹及Vogit 3种线型函数对轨道谱谱峰的拟合效果,提出了融合周期谱峰成分的轨道谱拟合表征方法,并通过反演计算验证了方法的可行性。其次,结合多条设计速度为350 km/h典型高速铁路轨道几何动态数据,实现了融合周期成分的高速铁路不同轨下基础无砟轨道谱拟合表征,可根据不同工况仿真需要将其应用于车辆动力学计算中。最后,提出线路长区段周期不平顺状态量化指标—谱峰能量PE,并对不同轨下基础线路轨道周期不平顺状态进行量化评估后发现:32 m简支梁PE随倍频增加而递减,可将该处PE作为线路长区段简支梁周期不平顺的评价指标;为避免简支梁倍频能量影响,以路基地段不同板型特征波长对应PE作为轨道板周期不平顺评价指标,其中Ⅰ型板PE最大为0.012 mm^(2),其次Ⅲ型板为0.008 mm^(2),Ⅱ型板最小为0.005 mm^(2)。研究成果进一步拓展了轨道谱动力学分析应用领域,可为线路养护维修管理提供理论参考。As the service life and operating speeds of railway lines increase,the issue and resulting influence of track periodic irregularity caused by under-rail foundation structure deformation have become increasingly critical.However,there is currently a lack of comprehensive evaluation methods for assessing the track periodic irregularity state of long sections,both domestically and internationally.This study aimed to characterize and invert the periodic irregularity state of track in long sections,focusing on analyzing the characteristics of periodic irregularities in different under-rail foundation types in high-speed railways.To achieve this,a method for characterizing and quantitatively evaluating the cyclic components of track spectra was proposed.First,the fitting effects of Gaussian,Lorentzian and Vogit line functions on the peaks of track spectra were compared using the nonlinear least squares method.An algorithm of fitting track spectra by integrating the periodic spectra peaks was proposed and the feasibility of the algorithm was verified through inversion calculations.Second,by utilizing a large amount of track inspection data from typical high-speed railway lines designed for a speed of 350 km/h,fitting characterization of ballastless spectrum of different foundation types in high-speed railways was realized by integrating periodic components.These fitted spectra can be used in vehicle dynamics calculations according to the needs of different simulation conditions.Finally,a quantitative assessment index for the periodic irregularity state of long track sections,named spectral peak energy(PE),was proposed.The different under-rail foundation types were evaluated and compared based on their PE values.It is found that the PE value of 32 m simply supported girders decreases with increasing frequency multiples.The PE value at this location was used as the evaluation index for the periodic irregularity of simply supported girders.To avoid the influence of energy at frequency multiples of simply supported girders,

关 键 词：高速铁路 周期性不平顺 轨道谱 无砟轨道 谱峰拟合 反演 

分 类 号：U216.3[交通运输工程—道路与铁道工程]