摘要
提出了适用于控制大跨桥梁风致振动的杠杆式主动多重调谐质量阻尼器(LT-AMTMD)控制策略。利用建立的LT-AMTMD结构系统的动力放大系数,评价了LT-AMTMD的性能。数值结果表明,驱动器置于质量块处的LT-AMTMD比驱动器置于其它位置的LT-AMTMD更加有效。驱动器置于质量块处的LT-AMTMD可以根据实际需要,通过改变支撑位置来调节弹簧的静伸长,而且保持其性能不变(包括冲程)。数值结果还表明,驱动器置于质量块处的LT-AMTMD可以明显地提高LT-MTMD的性能,而且比单个杠杆式主动调谐质量阻尼器(LT-ATMD)更加有效。
The lever-type active multiple tuned mass dampers （LT-AMTMD） are developed as feasible means of suppressing the wind-induced vibrations of long-span bridges. Employing the derived dynamic magnification factors of the LT-AMTMD structure system, the performance assessment of the LT-AMTMD is conducted. The LT-AMTMD with the actuator set at the mass block is shown to be more effective compared to the LT-AMTMD with the actuator set at other locations. The static stretching of the spring in the LT-AMTMD with the actuator set at the mass block may be adjusted in accordance with the practical requirements through changing the support location while maintaining the same performance （ including the stroke）. It is also shown that the LT-AMTMD with the actuator set at the mass block can remarkably improve the performance of the LT-MTMD and has higher effectiveness than single levertype active tuned mass damper （LT-ATMD）.
出处
《地震工程与工程振动》
CSCD
北大核心
2005年第4期155-161,共7页
Earthquake Engineering and Engineering Dynamics
