中国铁道科学2025，Vol.46Issue(5)：44-54,11.DOI:10.3969/j.issn.1001-4632.2025.05.04
车轮多边形对城轨高架线振动噪声影响规律
Influence of Wheel Polygon on Vibration and Noise in Evaluated Lines of Urban Rail Transit
摘要
Abstract
To investigate the influence of wheel polygon on vibration and noise of urban rail elevated lines,a study was conducted on a small-radius curved section of an urban rail elevated line.Tests were performed to measure the vibration of the track,bridge,and noise barrier,as well as trackside and environmental noise and wheel-rail roughness when trains passed through at different speed levels.The causes of peak system vibrations and noise under excitation of wheel polygon were analyzed.The impact of A-weighting on environmental noise evaluation was also discussed.The results show that the dominant order of wheel polygon was 16.The theoretical excitation frequency at different speed levels corresponds well with the low-frequency dominant frequencies of measured vibration and noise in the wheel-rail system,identifying wheel polygon as the primary excitation source for low-frequency vibration and noise.As the train speed increased,the excitation frequency of the wheel polygon gradually increased.At the speed of 53 km·h-1,the excitation frequency of the wheel polygon was close to the wheel-rail P2 resonance frequency,causing resonance of the wheel-rail system and resulting in a significant increase of low-frequency vibration and noise.While at speeds of 63 km·h-1 and 73 km·h-1,the low-frequency vibration and noise of the wheel-rail system decreased due to the avoidance of the P2 resonance frequency.The train should pass through this section at a balanced speed of 63 km·h-1.The environmental noise generated by the train with worst wheel polygon condition differs by 5.1 dB(A)and 7.9 dB(A)at speeds of 43 km·h-1 and 63 km·h-1,respectively,compared to trains with better wheel conditions.The use of A-weighting may underestimate the impact of low-frequency noise from the wheel-rail system.Therefore,more attention should be paid to low-frequency noise when evaluating environmental noise from urban rail elevated lines.关键词
车轮多边形/高架线/振动噪声/现场测试/城市轨道交通Key words
Wheel polygon/Elevated line/Vibration and noise/Field tests/Urban rail transit分类
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王朋松,胡晓依,成棣,刘鹏辉,谭辉,程朝伟,刘向明,杨延峰..车轮多边形对城轨高架线振动噪声影响规律[J].中国铁道科学,2025,46(5):44-54,11.基金项目
中国国家铁路集团有限公司科技研究开发计划课题(N2022J009) （N2022J009）
中国铁道科学研究院集团有限公司院基金课题(2020YJ280) （2020YJ280）
