带内置可旋转隔板的调谐液体阻尼器减振性能试验研究

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (19) : 64-69.

论文

张蓝方1，谢壮宁1，周子杰1，彭肇才2

作者信息 +

Test study on vibration reduction performance of tuned liquid damper with built-in rotatable baffles

ZHANG Lanfang1, XIE Zhuangning1, ZHOU Zijie1, PENG Zhaocai2

Author information +

文章历史 +

摘要

本文对带内置可旋转隔板调谐液体阻尼器(TLD)进行了振动台试验，首先对波高响应信号进行解耦分离，再采用不同方法识别液体晃动的模态频率和阻尼比，研究了隔板安装位置、隔板和晃动方向夹角()对TLD减振性能的影响。结果表明，受隔板附加质量和耗能作用的影响，TLD的1阶模态频率和相应的模态响应随的增大而减小，但隔板附加模态质量对频率的影响还不足以达到导致系统失谐的程度。当小于60°时，TLD的1阶模态阻尼比随的变化而单调递增，最大可达到8%左右；当大于60°时，隔板所产生的阻尼作用弱化了1阶模态响应使晃动呈高阶模态形式，从而导致晃动频率大幅增大，这个结果和已有研究认为TLD晃动模态频率随着角度增加而逐步增大的结论有本质差别，意味着不能通过改变大小的方式来实现TLD的调谐，但改变 可比较容易调节TLD的阻尼比使其达到振动控制所需要的最佳值。

Abstract

The performance of tuned liquid damper (TLD) with rotatable baffles is investigated using shaking table tests. The measured response of wave height is decoupled and then the modal frequency and damping ratio are identified by different parameter identification methods. The influence of baffle location and angle () between the baffle and the direction of fluid sloshing on TLD performance is considered. The results show that the modal frequency and corresponding modal response of TLD decrease with the increase of due to the influence of the added mass and energy dissipation of the baffles, but the influence of the added mass on the frequency is not enough to cause the TLD’s mistuning. When is less than 60°, the damping ratio increases monotonically with the change of up to about 8%. When is greater than 60°, the damping effect generated by the baffles reduces the first-order modal response and makes the sloshing in the form of the high-order mode, resulting in a significant increase of the sloshing frequency. This result is essentially different from the existing finding that the modal frequency of TLD increases gradually with the increase of , which means that the tuning of TLD cannot be realized by changing . However, changing can easily adjust the damping ratio of TLD to achieve the optimal value required for the vibration control.

导出引用

张蓝方1，谢壮宁1，周子杰1，彭肇才2. 带内置可旋转隔板的调谐液体阻尼器减振性能试验研究[J]. 振动与冲击, 2023, 42(19): 64-69

ZHANG Lanfang1, XIE Zhuangning1, ZHOU Zijie1, PENG Zhaocai2. Test study on vibration reduction performance of tuned liquid damper with built-in rotatable baffles[J]. Journal of Vibration and Shock, 2023, 42(19): 64-69

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