嵌入式轨道系统振动传递研究
杨刚1,2,3何远鹏1韩健1罗信伟3,4张智鑫2何况1
Research on Embedded Track System Vibration Transmission
YANG Gang1,2,3HE Yuanpeng1HAN Jian1LUO Xinwei3,4ZHANG Zhixin2HE Kuang1
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作者信息:1.西南交通大学轨道交通运载系统全国重点实验室，610031，成都
2.成都市新筑交通科技有限公司，611430，成都
3.广州振宁交通科技有限公司，611430，成都
4.广州地铁设计研究院股份有限公司，510010，广州
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Affiliation:1.State Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, 610031, Chengdu, China
2.Chengdu Xinzhu Transportation Technology Co., Ltd., 611430, Chengdu, China
3.Guangzhou Zhenning Transportation Technology Co., Ltd., 611430, Chengdu, China
4.Guangzhou Metro Design & Research Institute Co., Ltd., 510010, Guangzhou, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2024.07.034
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中图分类号/CLCN:U213.2
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栏目/Col:研究报告
摘要:
［目的］嵌入式轨道的阻尼较大，有较好的减振降噪性能，因此有必要对嵌入式轨道的减振降噪机理进行研究。［方法］以广州地铁14号线为例，对嵌入式轨道系统与普通扣件式轨道系统进行了静态与动态的振动测试；基于现场测试的轨道结构频响函数及纵向衰减率，分析嵌入式轨道系统的减振特性。［结果及结论］嵌入式轨道系统在垂向减振中存在着明显的工作频段；嵌入式轨道在绝大多数频段中的振动加速度幅值均小于普通扣件式轨道的振动加速度幅值；当振动频率为550~1200Hz时，嵌入式轨道的高分子阻尼材料与弹性垫板的减振体系在该频段具有良好的吸振能力；嵌入式轨道与调频式钢轨阻尼器一样存在固定的调整频段，其调整频带范围在振动频率为400Hz附近；相比于离散支承的轨道结构形式，连续支承的轨道结构形式在振动频率大于750Hz频段的钢轨振动衰减率更优。
Abstracts:
［Objective］ Embedded tracks have relatively high damping, providing good vibration and noise reduction performance. Therefore, it is necessary to study the vibration reduction mechanism of embedded track system. ［Method］ Taking Guangzhou Metro Line 14 as example, static and dynamic vibration tests are conducted on both embedded and conventional fastener-based track systems. Based on the track structure frequency response functions and longitudinal attenuation rates obtained from field tests, the vibration reduction characteristics of embedded track system are analyzed. ［Result & Conclusion］ Embedded track system exhibits a distinct operational frequency band in vertical vibration reduction. In most frequency bands, the vibration acceleration amplitude of embedded tracks is smaller than that of conventional fastener-based tracks. When the vibration frequency is between 550 and 1 200 Hz, the polymer damping materials and the elastic pad shock-absorbing systems of embedded tracks exhibit good vibration absorption capabilities in this frequency band. Embedded tracks, like frequency-adjustable rail dampers, have a fixed adjustment frequency band, typically around 400 Hz. Compared to the track structure form by discrete support, the track structure form by continuous support shows better rail vibration attenuation rates in frequency bands above 750 Hz.
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