半主动摩擦阻尼器对偏心结构振动控制的仿真研究

Simulation of vibration control for irregular buildings using semi-active friction dampers

通过系统仿真工具S imu link和Stateflow,建立了在多维地震动作用下,采用半主动摩擦阻尼器对偏心结构进行振动控制的系统模型,给出了采用摩擦阻尼器所在楼层的速度响应绝对值直接反馈,控制半主动摩擦阻尼器的方法.在运用时程分析法,确定小震作用下摩擦阻尼器较优的初始起滑力的基础上,设计了相应的控制系统,并且在具有加速度脉冲和速度脉冲的近断层地震波作用下,与其他算法进行了比较,检验了本算法的有效性和优越性.

A simulation model for irregular buildings controlled by semi-active friction dampers subjected to multi-dimensional earthquakes is established based on Simulink and Stateflow in MATLAB program. A semiactive control strategy using the absolute value of velocity of the floor where the friction dampers are installed is provided and the sub-optimal initial sliding force is determined by time history analysis. Under the excitation of near-fault earthquakes with distinct pulse, the effectiveness and the superiority of the above mentioned control strategy are verified and compared with other control methods. Finally, some preliminary conclusions are drawn according to the analyses and numerical results.