斜拉索磁流变智能阻尼控制系统分析与设计

Design and analysis of magnetorheological dampers with intelligent control systems for stay cables

在结构主动、半主动和智能控制系统优化设计方法的基础上,研究了斜拉索磁流变智能阻尼控制系统的设计方法,并采用所建立的设计方法完成了山东滨州黄河公路大桥斜拉索磁流变智能阻尼减振系统的优化设计。采用限界HROVAT最优控制算法确定磁流变阻尼器的半主动控制力,数值计算了斜拉索磁流变阻尼控制系统的风振反应。进一步分析比较了主动控制、半主动控制、Passive-on被动控制和Passive-off被动控制策略下的磁流变阻尼器控制斜拉索风致振动的控制效果,验证了磁流变阻尼器优化设计方法的正确性和磁流变阻尼器控制策略的有效性。

The design method of MR damper for suppression of stay cables vibration was proposed based on the design approaches of structural active control, semiactive control and intelligent control systems. The MR damper for stay cables of Shandong Binzhou Yellow River Bridge was designed by utilizing the proposed design method ,and the analysis of the cables incorporated with the designed MR damper was carried out. The control effectiveness of the designed MR dampers reduced the prototype cable wind-induced vibration using semiactive control strategy proposed by HARVOT. Active control,semiactive control and passive-on and passive-off control strategy were verified numerically and compared with each other. The analytical results show that the designed MR damper can effectively reduce the cable wind-induced vibration. The availability and validity of the design method of MR damper for cables were also simultaneously demonstrated through the numerical study on the prototype cables transversely connected with MR damper near the lower anchorage.