【摘要】 针对桥梁横桥向抗震条件相对较差的情况,提出利用变阻尼控制装置对典型桥梁结构横向振动进行控制的方法,探讨其基于LQR算法的半主动控制效果。将被控结构作为多自由度体系,建立了结构—变阻尼系统力学模型和运动微分方程,进而结合实例利用Matlab软件仿真分析了各种半主动控制算法和被动控制策略的控制效果。研究结果表明:采用半主动变阻尼控制装置有效的降低了桥梁结构横向地震反应,控制效果明显。更多还原

【Abstract】 In this paper,the method of semi-active control with variable damper is presented to deal with the relatively poor transversal seismic condition of a bridge.Based on the LQR control algorithm,the control effectiveness for transverse vibration of the bridge is discussed.Taking the structure as a multiple-degree of freedom system,the calculating model of the structure-variable damper system is set up and its differential equation is derived.Combined with practical example,the control system is simulated and studied by various semi-active control algorithms and passive strategy with MATLAB.The results show that the semi-active control with variable damper can decrease the transverse vibration of the bridge effectively,and the control effect is obvious.更多还原