伺服电机TMD控制系统的研制与振动台试验

Shaking Table Test of a Servomotor TMD System for Structural Control

介绍了用伺服电机作为可调阻尼器的 TMD控制系统 (简称伺服电机 TMD系统 )的研制以及振动台试验情况。本系统由可调质量、可调弹簧和可调阻尼器组成 ,控制系统的参数可以根据受控结构的动力特性进行调整 ,以达到最佳的控制效果。通过对这一系统进行自由振动试验、不同阻尼的试验 ,对系统的动力特性和减震性能有了比较深入的了解。通过对安装这一系统的框架结构模型进行地震模拟振动台试验 ,证明了这种控制系统具有较好的控制效果 ,特别是对结构位移反应的 RMS值的控制效果更佳 。

A new TMD control system using Servomotor as tuned damper is presented in this paper. The system is composed of tuned mass, tuned springs and tuned damper. The parameters of the system can be tuned with the dynamic characteristics of the controlled structure in order to get the best control effect. The dynamic behavior and the control effect of the new system were studied through a series of free vibration tests with variant damping values. Then the system was installed on a three story steel frame structure, and shaking table tests under various seismic inputs were carried out. The control effect of the system was proved to be good, especially for the RMS value of the displacement responses of the structure. The dynamic analysis model for the controlled system was also developed, and the comparison of analysis and test showed that the analysis model can give good prediction of the dynamic response for the controlled system. These test data and the analysis model can be incorporated in the future use of this new control system.