自由振动台测量TLDEB水箱频率的研究

Study on frequency measurement of TLDEB water tank by free shaking table

通过在普通调谐液体阻尼器(TLD)水箱中加入不同高度和宽度的扰流装置,将其改造成调谐液体挡板阻尼器(TLDEB)水箱,以此来控制和提高水箱中第一阶振荡水的频率;并通过自行设计和制作的自由振动台,对TLDEB水箱中第一阶振荡水的频率进行观测与研究。通过比较普通TLD水箱与改造后TLDEB水箱的第一阶振荡水频率可知,TLDEB水箱的频率值从0.8056Hz提高到1.8696Hz,提高幅度达132.08%;随着扰流装置宽度和高度的增加,水箱中振荡水的频率也在提高,且TLDEB水箱相对于普通TLD水箱的晃动阻尼更大,对于结构的可控减振是十分有利的。本研究可为实际工程运用调谐液体阻尼器减振提供参考。

In terms of economy and practice, in the study of vibration reduction of high-rise structures, ordinary water tanks can not meet the frequency requirements of structural vibration reduction. The disturbance devices with different height and width are added to the ordinary water tank and transformed into TLDEB water tank in order to control and improve the frequency of the first-order oscillating water in the water tank, and the frequency of the first-order oscillating water in TLDEB water tank is observed and studied by a self-designed and manufactured free vibration table. The test results show that: the frequency of the modified TLDEB tank increases 132.08% from 0.8056 Hz to 1.8696 Hz. With the increase of the width and height of the disturbance devices, the frequency of oscillating water in the water tank also increases, and the sloshing damping of TLDEB water tank is larger than that of ordinary TLD water tank, which is very advantageous to the controllable vibration reduction of the structure and provides valuable reference for the practical engineering application of tuned liquid damper.