用于控制高柔结构振动的POD技术

STDY ON PENDULUM-OIL DAMPER AND THEIR APPLICATIONTO VIBRATION CONTROL OF FLEXIBLE STRUCTURES

本文通过模型试验和理论分析研究了一种控制高柔结构振动的新方法──ＰＯＤ（摆、油阻尼器）减振系统。文中详细分析了其减震原理，并提出了与试验结果相吻合的三角形非线性滞回模型。试验结果表明，在接近调谐状态下ＰＯＤ法可减振４８％。数值计算的结果也表明，ＰＯＤ不仅减振效果比ＴＭＤ高得多，而且有效频带也觉得多。ＰＯＤ系统具有造价低、易安装、占用空间小、免维护等优点，可用于风或地震等荷载引起的电视塔、悬索桥塔、海洋平台或超高层建筑的振动。

ln this thesis a new kind of passive control device, the Pendulum Oil Damper(POD) sys- tem, is studied. The experimental study and theoretical analysis are carried out. An example of structural control design of a TV tower by using POD is given also. The results of the model tests show that the POD system is very effective for vibration control of flexi- ble structures. After carefully analyzing of the working process of POD system, the au- thors present a triangle nonlinear hysteretic model, and the calculated results hy the mod- el cnincide very well with the test results. When the POD system with mass ratio of 1% is used to control the vibration of a high TV tower, about 34% of the displacement is reduced. The POD method is mo re effective than TMD and its effective frequency band is much wider than TMD. So the POD method is a reliable and effective method for vi- bration control of high flexible structures.