| TID隔振器浮置板轨道低频减振特性研究 |
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| 引用本文： | 盛曦,曾会柯,石灿,张颖,杜彦良.TID隔振器浮置板轨道低频减振特性研究[J].工程力学,2023,40(5):49-58. |
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| 作者姓名： | 盛曦 曾会柯 石灿 张颖 杜彦良 |
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| 作者单位： | 深圳大学城市智慧交通与安全运维研究院，深圳 518060 |
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| 基金项目： | 国家自然科学基金项目(52008264)；深圳市科技计划项目(KQTD20180412181337494) |
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| 摘 要： | 为了实现对地铁低频环境振动的控制，提出了一种基于TID(Tuned inerter damper,调谐惯容阻尼器)的浮置板板下隔振器，并以此形成新型浮置板轨道结构。分别探究了TID隔振器浮置板轨道的低频弹性波传播特性、简谐点荷载作用下振动特性以及列车荷载作用下减振效果；结合多目标遗传算法，开展了TID参数优化分析。结果表明：TID的引入使得传统钢弹簧浮置板新增弯曲波带隙，实现了对板内弹性波的调控；浮置板低频共振所致的振动放大问题得到较大改善。TID隔振器浮置板轨道在4 Hz～16 Hz频率范围内的减振效果得以提升，浮置板振动响应也得到减弱。
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| 关 键 词： | 浮置板轨道 惯容器 低频减振 带隙特性 谱元法 |
| 收稿时间： | 2021-10-18 |
STUDY ON LOW-FREQUENCY VIBRATION MITIGATION CHARACTERISTICS OF TID-VIBRATION-ISOLATOR FLOATING SLAB TRACK |
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| Affiliation: | Institute of Urban Smart Transportation & Safety Maintenance, Shenzhen University, Shenzhen 518060, China |
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| Abstract: | In order to control the train-induced low-frequency ambient vibration, we apply the tuned inerter damper (TID) to the steel-spring floating slab track (FST) and propose a novel TID-vibration-isolator FST structure in this study. The low-frequency elastic wave propagation properties of the TID-vibration-isolator FST structure and its vibration characteristics under the harmonic point load are elucidated. Moreover, the TID parameter is optimized with the multi-objective genetic algorithm. Then, the low-frequency vibration-mitigation characteristics of the TID-vibration-isolator FST under train loads are investigated based on the vertical coupled dynamics model of a vehicle-TID vibration isolator FST-foundation system. The results show that a new band gap of the bending wave occurs in the TID-vibration-isolator FST. Due to the inhibition of the bending wave propagation arising from the band gap, the receptance amplitude peak of the foundation at the low resonance frequency of the floating slab disappear. The low-frequency vibration-mitigation performance in the frequency range of 4 Hz~16 Hz is improved in this novel track structure. Besides, vibration responses of the floating slab are attenuated. |
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