城市轨道交通轨道短波不平顺特性实测研究
韦红亮1郑稳稳2王宏轩2房建2雷晓燕2练松良3
Field Measurement Study on Urban Rail Transit Track Shortwave Irregularities
WEI HongliangZHENG WenwenWANG HongxuanFANG JianLEI XiaoyanLIAN Songliang
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作者信息:1.广西壮族自治区高速公路发展中心， 530022， 南宁
2.华东交通大学轨道交通基础设施性能检测与保障国家重点实验室， 33013， 南昌
3.同济大学道路与交通工程教育部重点实验室, 201804， 上海
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Affiliation:Guangxi Zhuang Autonomous Region Expressway Development Center, 530022, Nanning, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2023.08.015
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中图分类号/CLCN:U211.3
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栏目/Col:研究报告
摘要:
目的：轨道短波不平顺会引起轮轨系统高频振动，形成巨大的轮轨冲击力，危害行车安全。对此需要研究城市轨道交通轨面短波不平顺特性。方法：基于上海市轨道交通11号线轨面短波不平顺现场实测数据，对实测数据进行消除异常值和趋势项等预处理后，采用ISO 3095：2013《声学轨道交通轨道车辆发出的噪声测量》对上海轨道交通11号线真如站—枫桥路站区间的轨面不平顺状态进行评判；并利用最大熵谱法对不同轨道类型的轨道短波不平顺功率谱进行估计，将得到的功率谱密度曲线与中国铁道科学研究院提出的石太线(石家庄—太原)短波不平顺功率谱、学者Sato提出的粗糙度功率谱进行比较。结果及结论：轨道短波不平顺幅值分布接近正态分布，轨面不平顺最大幅值可达15 mm。随着轨道短波不平顺幅值频率分布曲线形状呈现中间高两边低，分布特性近似于正态分布。在分析波长范围内，轨道短波不平顺水平谱值均超出ISO 3095：2013标准限值，最大差值达2087 dB。DTⅢ2扣件型支承块轨道结构轨面不平顺状态要优于减振器扣件型支承块轨道结构及浮置板轨道结构。上海轨道交通11号线的轨面状态优于石太线普速铁路。
Abstracts:
Objective: Track shortwave irregularities can lead to highfrequency vibrations in wheelrail system, resulting in a significant wheelrail impact force and undermining operational safety. It is aimed to investigate the characteristics of urban rail transit track surface shortwave irregularities.Method: Based on the fieldmeasured data of Shanghai Rail Transit Line 11 track surface shortwave irregularities, the fieldmeasured data is preprocessed by eliminating outliers and trends. ISO 3095:2013 AcousticsRailway applicationsMeasurement of noise emitted by railbound vehicles is used to evaluate the track surface irregularities along Line 11 Zhenru Sta.Fengqiao Road Sta. interval. The maximum entropy spectrum method is employed to estimate the track shortwave irregularity power spectra for different track types. The obtained power spectral density curves are compared with the shortwave irregularity power spectra proposed by China Academy of Railway Sciences for ShiTai Line (ShijiazhuangTaiyuan) and the roughness power spectrum suggested by scholar Sato.Result & Conclusion: The amplitude distribution of track shortwave irregularities approximates a normal distribution, with the maximum track irregularity amplitude reaching 1.5 mm. The frequency distribution curve of track shortwave irregularities exhibits high in the middle and low on both sides, the characteristics of which resembles the normal distribution. Within the analyzed wavelength range, the horizontal spectral values of track shortwave irregularities exceed the limits specified in ISO 3095:2013, with a maximum difference of 20.87 dB. The DTⅢ2 fastenertype bearing block track structure exhibits better track surface irregularity conditions compared to the vibrationdamping fastenertype bearing block track structure and the floating slab track structure. The track surface condition of Shanghai Rail Transit Line 11 is better than that of ShiTai common speed railway line.
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