Development of Multifunctional High Damping Device and Application to Seismic Isolation for Combined Structures

这项研究是由校企联合项目进行的。主要研究成果如下：1.提出了一种由推力旋转单元和发电机组成的高阻尼力减振器，称为Mechatro阻尼器。对模型装置进行的振动试验表明，即使模型尺寸较小，该阻尼器也能产生较高的阻尼力，如长500 mm、直径100 mm的阻尼器，最大可产生5000N的阻尼力。实现了2.3种振动控制方式：主动式、主动式和半主动式。通过在直流伺服电机端子之间引入RLC电路，实现了无源隔振系统。通过振动试验和计算机分析，在共振和非共振两种情况下都观察到了高的减振效果。3.为了产生主动振动控制模式，提出了一种通过阻尼器的旋转运动来再生电能的新思路。采用继电控制算法控制的线性动态执行器在高速旋转过程中可以产生阻尼力。4.为了进一步发展所提出的阻尼器的应用，进行了数值研究。作为一种典型的大型综合体结构，考虑了热力锅炉与支撑结构的组合。对减震装置进行了地震反应分析，以检验减震装置的适用性。

This resrch was carried out by joint project between universities and industries. Basic results obtained from this research can summarized as below.1.A high damping device referred as Mechatro Damper which consists of a thrust rotational unit together with an electric generator was proposed. Through shaking test done to the model device, it was proved that the damper can produce high damping capacity even for the small size nodel ; for example, the damper having 500mm-length and 100mm-diameter produced damping force of 5,000 N at maximum.2.3 modes of vibration control methods were realized ; pessive, active and semiactive ones. Passive isolation system was achieved by introducing RLC circuit among terminals of DC servo motor. High damping effect was observed by shaking test and computer analysis under both cases of the resonant and nonresonant conditions.3.In order to produce active vibration control mode, a new idea of regenerating electric power from the rotating motion of the damper was proposed. A linear dynamic actuator controlled by a relay control algorithm could produce damping force during the high speed rotation.4.For the further development into the application of the proposed damper, numerical investigation was done. As a typical large comlex structure, combined thermal boiler and support structure was taken into consideration. Seismic response analysis was carried out to examine the applicability of the damping device.