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

这项研究是由大学和工业界联合开展的。主要研究结果如下：1.提出了一种由推力旋转单元和发电机组成的高阻尼装置--机械阻尼器。通过对模型装置的振动试验，证明了该阻尼器即使对小尺寸的节点也能产生很高的阻尼能力，如长500 mm、直径100 mm的阻尼器，最大阻尼力可达5,000 N，实现了被动、主动和半主动3种振动控制方式。通过在直流伺服电机两端引入RLC电路，实现了无源隔振系统。振动试验和计算机分析表明，在共振和非共振两种情况下，阻尼器都具有很好的减振效果。3.提出了利用阻尼器的旋转运动产生电能的新思想，以产生振动主动控制模式。采用继电器控制算法控制线性动态执行器，可在高速旋转过程中产生阻尼力。4.为进一步拓展阻尼器的应用，进行了数值研究。作为一种典型的大型复杂结构，热锅炉与支承结构的组合是本文研究的对象。进行了地震反应分析，以检查阻尼装置的适用性。

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.