基于异常特征提取的纵连轨道板接缝损伤识别

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中图分类号：U213.2 文献标志码：A

本文引用格式：，李再韩等.基于异常特征提取的纵连轨道板接缝损伤识别[J].华东交通大学学报，2025，42（3）：66-73.

Damage Identification in Joints ofLongitudinal Continuous Track SlabsBased onAbnormal FeatureExtraction

LiuHaoran，Li Zaiwei，LuHongyao，HeYuelei

（SchoolofUrbanRailwayTransportation，Shanghai UniversityofEngineering Science，Shanghai 2Ol620，China）

Abstract：To investigate the damage mechanism of the wide and narrow joints ofCRTSII slab ballastless tracks and identify damage，a field investigation was conducted on a passenger-dedicated line in the East China region，folowed by long-term monitoring of track slab temperature and joint displacement. Based on the DBSCAN clustering algorithm，temperature data representing energy input and displacement data representing energy output during high-temperature seasons were screened and abnormal feature data were extracted.By incorporating the standard deviation，which representsdata dispersion，to analyze the energyaccumulationand sudden release process within the track slabs，a comprehensive computational model combining data-driven and physical mechanisms was established.Anovel method for identifying wide and narrow joints damage based on abnormal feature extraction was proposed.The results show that，during the period with prolonged high temperature in summer， there is along-term inconsistency between the temperature ofthe track slab and the displacement of the joints.The established physical model supplemented eight additional abnormal characteristic data for damage identification analysis of wide and narrow joints.In addition，prolonged high temperatures lead to energy accumulation and sudden release within the track slabs， with more pronounced energy changes observed at wide joint locations， thereby causing significant damage to the wide and narrow joints.

Keywords：ballstlesstrack;wideand narrow joints;abnormal feature extraction;energybalancesystem;damage identification

Citation format：LIUHR，LI Z W，LU HY，et al. Damage identification in jointsof longitudinal continuous track slabs based onabnormal feature extraction[J].JournalofEastChina Jiaotong University，2O25，42（3）：66- 73.

近年来，我国高速铁路和客运专线的大规模建设推动了无砟轨道的快速发展和广泛应用。（剩余9605字）