Research on Embedded Track System Vibration Transmission

YANG Gang,HE Yuanpeng,HAN Jian,LUO Xinwei, ZHANG Zhixin,HE Kuang

Chengshi guidao jiaotong yanjiu（2024）

State Key Laboratory of Rail Transit Vehicle System | Guangzhou Zhenning Transportation Technology Co. | Chengdu Xinzhu Transportation Technology Co.

Cited 0|Views5

Abstract

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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Key words

metro,embedded track system,vibration transmission

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【要点】：研究嵌入式轨道系统的振动传递特性，发现其在特定频率范围内具有良好的减振效果。

【方法】：以广州地铁14号线为案例，对嵌入式轨道和传统扣件式轨道系统进行了静态和动态振动测试，通过分析轨道结构的频率响应函数和纵向衰减率。

【实验】：实验使用了现场测试数据，数据集名称未提及；结果表明，在550至1200 Hz的频率范围内，嵌入式轨道系统展现出了良好的振动吸收能力。