【摘要】 基于杠杆式调谐质量阻尼器(LT-TMD)的概念,提出了杠杆式主动调谐质量阻尼器(LT-ATMD)的控制策略.利用导出的LT-ATMD结构系统的动力放大系数解析式,讨论了LT-ATMD的动力特性(包括冲程).数值结果表明,驱动器设置于质量块处LT-ATMD和ATMD具有近似相等的最优阻尼比、调谐频率比、控制效果和冲程.驱动器设置于质量块处LT-ATMD的冲程略大于LT-TMD的冲程,但能明显地提高LT-TMD的控制效果.与ATMD相比,驱动器设置于质量块处LT-ATMD的关键优点是通过移动支撑的位置可以限制弹簧的静力和动力伸长而保持其性能(包括冲程)不变.更多还原

【Abstract】 Based on the concept of the lever-type tuned mass damper (LT-TMD), the lever-type active tuned mass damper (LT-ATMD) was developed for the vibration control of structures. Employing the derived analytical-expressions for the dynamic magnification factors of the LT-ATMD structure system, a study was performed on the dynamic characteristics (including the stroke displacement) of the LT-ATMD. The results indicate that the LT-ATMD with the actuator set at the mass block and the ATMD can approximately reach the same optimum damping ratio, tuning frequency ratio, effectiveness, and stroke displacement. The LT-ATMD with the actuator set at the mass block is shown to have slightly larger stroke displacement but significantly higher effectiveness with respect to the LT-TMD. A key advantage of the LT-ATMD with the actuator set at the mass block,compared to the ATMD,is that the static and dynamic stretching of the spring may be adjusted in accordance with the practical requirements through moving the location of the support while maintaining the same performance (including the same stroke displacement).更多还原