학술논문
悬吊双摆动力特性分析及其在结构减振控制中的应用 / Dynamic characteristics of suspended double pendulum and its application in structural vibration control
Document Type
Academic Journal
Author
Source
振动工程学报 / Journal of Vibration Engineering. 32(2):305-313
Subject
Language
Chinese
ISSN
1004-4523
Abstract
悬吊质量摆具有机理明确、构造简单和减震效果良好等优点, 但传统悬吊单摆受限于摆长难以实现和多阶调谐能力不足等问题, 不具备工程可行性.针对上述问题, 提出具有多个调谐质量和弹簧的悬吊多摆结构, 通过附加弹簧和多个质点更加灵活地调控悬吊摆周期, 同时实现多阶振型的调谐减振控制.建立悬吊双摆自身的动力方程并进行动力特性分析, 获得频率解析解, 从而阐释其减振机制.在此基础上建立具有悬吊双摆的结构整体动力学方程.选取均匀结构和刚度递减结构作为被控结构进行单摆和双摆的减震控制效果研究.结果表明悬吊双摆的减震效果明显优于悬吊单摆, 且实现了多阶调谐控制, 具有更强的稳健性和实用性, 适合应用于多高层建筑结构.
Suspended mass pendulum has the advantages such as definite mechanism, simple structure and superior damping effect, but the traditional simple pendulum is restricted by the deficiencies including difficulty of adjusting pendulum length and the lacking of the multiple modals tuning, so it has no engineering feasibility.In view of the above problems, the suspended mass pendulum system coupled with multiple tuned mass blocks and multi springs is proposed, and the system periods can be flexibly controlled by multiple additional springs and mass blocks, so the tuning vibration control of multi-mode shapes can be realized at the same time.The dynamic equation of the suspended double pendulum is presented, the dynamic analysis is carried out to obtain the frequency analytical solution, and the corresponding damping mechanism is formulated.On this basis, the dynamic equation of the building structure with suspended double pendulum is established.One uniform structure and one stiffness decreasing structure are selected as the controlled structures to study the damping effect of the simple pendulum and the double pendulum.The results show that the damping effect of the suspended double pendulum is much better than that of the suspended simple pendulum, and multiple modal tuned control is realized.In addition, the suspended double pendulum has more excellent robustness and practicability, so it is suitable for high-rise building structures.
Suspended mass pendulum has the advantages such as definite mechanism, simple structure and superior damping effect, but the traditional simple pendulum is restricted by the deficiencies including difficulty of adjusting pendulum length and the lacking of the multiple modals tuning, so it has no engineering feasibility.In view of the above problems, the suspended mass pendulum system coupled with multiple tuned mass blocks and multi springs is proposed, and the system periods can be flexibly controlled by multiple additional springs and mass blocks, so the tuning vibration control of multi-mode shapes can be realized at the same time.The dynamic equation of the suspended double pendulum is presented, the dynamic analysis is carried out to obtain the frequency analytical solution, and the corresponding damping mechanism is formulated.On this basis, the dynamic equation of the building structure with suspended double pendulum is established.One uniform structure and one stiffness decreasing structure are selected as the controlled structures to study the damping effect of the simple pendulum and the double pendulum.The results show that the damping effect of the suspended double pendulum is much better than that of the suspended simple pendulum, and multiple modal tuned control is realized.In addition, the suspended double pendulum has more excellent robustness and practicability, so it is suitable for high-rise building structures.