To address the issue of excessive static stretching in tuned mass damper (TMD) used for vertical vibration control of low-frequency structures, a novel tuned liquid mass damper (TLMD) is proposed in the present study, and corresponding theoretical analysis and experimental investigation are carried out. The proposed TLMD consists of a mass-spring oscillator and a tank filled with liquid, with the mass submerged in the liquid. The added mass generated from fluid-solid coupling is utilized to achieve an inerter-like effect. Based on the characteristics and configuration of the device, the analytical model of the TLMD is proposed, and the dynamic parameters of the oscillation system are derived. Three TLMDs with different spring stiffness are designed and manufactured. The frequency reduction effect of the added mass and the feasibility of the proposed analytical model have been validated by free decay tests and forced vibration tests. Finally, the proposed TLMD has been implemented for the first time to the low-frequency vertical vortex-induced vibration control of a large-span cable-stayed bridge, and its effectiveness has been verified through a steady-state excitation test based on a self-developed large-scale bridge exciter. The field test results indicate that after the installation of the TLMDs, the steady-state velocity amplitude of the bridge decreases from 19.9 mm/s to 13.2 mm/s, and the damping ratio increases from 0.198 % to 0.842 %.

中文翻译：

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用于低频垂直振动控制的新型调谐液体质量阻尼器：模型实验和现场测试


针对用于低频结构垂直振动控制的调谐质量阻尼器（TMD）过度静态拉伸的问题，本研究提出了一种新型调谐液体质量阻尼器（TLMD），并进行了相应的理论分析和实验研究。执行。所提出的 TLMD 由质量弹簧振荡器和充满液体的罐组成，质量浸入液体中。利用流固耦合产生的附加质量来实现类似惰性的效果。根据装置的特点和结构，提出了TLMD的解析模型，并推导了振荡系统的动态参数。设计并制造了三种具有不同弹簧刚度的TLMD。通过自由衰减试验和受迫振动试验验证了附加质量的频率降低效果和所提出的分析模型的可行性。最后，首次将所提出的TLMD应用于大跨度斜拉桥低频垂向涡激振动控制，并通过基于自激振动的稳态激励试验验证了其有效性。 - 开发大型桥式激振器。现场试验结果表明，安装TLMD后，桥梁稳态速度幅值从19.9 mm/s减小到13.2 mm/s，阻尼比从0.198%增大到0.842%。