用于杨浦大桥抖振控制的MTMD研究

Buffeting Control of the Yangpu Bridge Using Multiple Tuned Mass Dampers

研究了利用多重调谐质量阻尼器（ＭＴＭＤ）系统控制杨浦大桥抖振的基本方法。提出了分析ＭＴＭＤ系统频率特性的方法和一种新的杠杆式ＴＭＤ结构形式。研究表明ＭＴＭＤ系统的控制效率与它的中心频率比和频率带宽比有很大关系。杠杆式ＴＭＤ与传统ＴＭＤ相比，对安装的净空要求较低。设计了分别对应不同质量比的七种ＭＴＭＤ系统。根据需要的控制效率和许可的预算。

A preliminary strategy of using multiple tuned mass damper(MTMD) system in buffeting control of the Yangpu Bridge is presented. The MTMD system consists of a set of TMDs attached to the center region of the main span of the bridge and symmetrical to the center of the main span as well as the central line along the bridge span. It was found that the control efficiency of the MTMD system was sensitive to its frequency characteristics, namely, the central frequency ratio and the frequency band width ratio. On the other hand, the damping ratio of the TMDs had less significant effects on the control efficiency. A lever type of TMD is presented, it requires less space for installation as compared with the traditional hanging type of TMD. Seven MTMD systems corresponding to seven different mass ratios were designed. These seven MTMD systems can be used for the buffeting control of the Yangpu Bridge according to the required control efficiency and the available budget.