隔舱式颗粒阻尼器在沉管隧道中的减震控制试验研究

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (17) : 7-12.

论文

闫维明1, 谢志强1，张向东2，王瑾,1，杲晓龙1

作者信息 +

Compartmental particle damper and its experimental investigation in seismic control of immersed tunnel

YAN Wei-ming1，XIE Zhi-qiang1, ZHANG Xiang-dong2, WANG Jin1，GAO Xiao-long1

Author information +

文章历史 +

摘要

基于修正的TLD设计理论，提出了一种适合沉管隧道使用的隔舱式颗粒阻尼器及其设计方法，并以某沉管隧道为原型，设计制作了1:60的缩尺模型，对设置颗粒阻尼器前后的模型隧道进行了振动台试验。研究结果表明：颗粒阻尼器对沉管隧道纵向的减震控制效果良好，能够有效地降低模型隧道接头轴力和相对位移等动力响应，颗粒堆积状态、较优附加质量比、激励频谱特性、激励强度是影响其减震效果的主要因素。颗粒阻尼器对沉管隧道的纵向基频有降低效果，而颗粒的附加质量比和堆积状态是调谐主体结构基频的关键因素。采用传递函数幅值可以表述模型隧道模态响应程度，提出了通过模型隧道的模态响应降低程度确定较优附加质量比的方法，并进而实现对主体结构低阶振型的有效控制。

Abstract

Based on the modified design theory of TLD，a preliminary design method of compartmental particle damper for immersed tunnel was presented. A 1/10-scale model tunnel based on a immersed tunnel was designed. The shaking table test of immersed tunnel with and without particle dampers was conducted .The results showed that seismic control of particle damper for the longitudinal immersed tunnel has better effect; a particle damper can effectively reduce dynamic response which is about joint axial force and relative displacement and so on, while the major factors influencing its damping effect are the accumulation of particles and better ratio of added mass and spectrum characterization of excitation and amplitude of excitation. Particle damper system have good performance in reducing the longitudinal fundamental frequency to immersed tunnel, however, the ratio of added mass and the accumulation of particles are principal factor for tuning fundamental frequency of the primary structure. The amplitude of transfer function can express level of modal response, therefore, the method ascertaining better ratio of added mass was presented by decreased degree of modal response, and then it realized effective control to lower vibration modes of primary structure.

导出引用

闫维明1, 谢志强1，张向东2，王瑾1，杲晓龙1. 隔舱式颗粒阻尼器在沉管隧道中的减震控制试验研究[J]. 振动与冲击, 2016, 35(17): 7-12

YAN Wei-ming1，XIE Zhi-qiang1, ZHANG Xiang-dong2, WANG Jin1，GAO Xiao-long1. Compartmental particle damper and its experimental investigation in seismic control of immersed tunnel[J]. Journal of Vibration and Shock, 2016, 35(17): 7-12

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