改进IOC控制算法及其在结构振动控制中的应用
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摘要
在连续状态方程建立的IOC(瞬时优化控制)算法的基础上,直接根据高层建筑结构动力学方程导出了离散域的IOC算法,在性能泛函中加入加速度反馈项,并采用一El波作用下的10层剪切型建筑模型进行了模拟计算。计算结果表明,IOC控制算法对位移、速度、加速度和层间位移响应均有较好的控制;在主动作动器输入能量基本相等的情况下,改进IOC控制算法在结构高层部分的位移、速度和加速度响应及低层部分的层间位移响应控制效果优于传统IOC控制算法。
Based on the traditional IOC(instantaneous optimal control) algorithm,an improved IOC algorithm,which was derived directly from the dynamic equations of the high-rise structure in the discrete domain,was established.Moreover,the feedback of accelerations was taken into account.At last,a 10-story shear model undergoing the 1940 El Centro earthquake record was simulated.The results of the simulation indicated that the improved IOC algorithm is effective in controlling the acceleration,velocity and displacement responses of the structure.In addition,the improved IOC algorithm appears to be more effective than the traditional one in controlling the responses of acceleration,velocity and displacement on the top floors and also the displacement responses between adjacent floors on the lower floors.
Based on the traditional IOC(instantaneous optimal control) algorithm,an improved IOC algorithm,which was derived directly from the dynamic equations of the high-rise structure in the discrete domain,was established.Moreover,the feedback of accelerations was taken into account.At last,a 10-story shear model undergoing the 1940 El Centro earthquake record was simulated.The results of the simulation indicated that the improved IOC algorithm is effective in controlling the acceleration,velocity and displacement responses of the structure.In addition,the improved IOC algorithm appears to be more effective than the traditional one in controlling the responses of acceleration,velocity and displacement on the top floors and also the displacement responses between adjacent floors on the lower floors.
引文
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[8]Tong Shaowei,Yang Yiren,Tang Huaiping.Analysis on seis-mic response of high-rise structure using base isolation[J].Journal of Sichuan University:Engineering Science Edition,2011,43(Supp2):183-187.[童少伟,杨翊仁,唐怀平.采用基础隔震的高层建筑地震响应分析[J].四川大学学报:工程科学版,2011,43(增2):183-187.]
[2]Yang J N,Akbarpour A,Ghaemmaghami P.Optimal controlalgorithms for earthquake-excited buildings[J]//Proceedingof 2nd Int.Symposium on Structural Control,1985.
[3]Yang J N,Akbarpour A,Ghaemmaghami P.New optimalcontrol algorithms for structural control[J].Journal of Engi-neering Mechanics,ASCE,1988,113(9):1369-1386.
[4]Yang J N,Li Z,Liu S C.Stable controllers for instantaneosoptimal control[J].Journal of Engineering MechanicsASCE,1992,118(8):1612-1630.
[5]Bahar O,Mahzoon M,Bann M R,et al.Discrete instaneousoptimal control method[J].Iranian Journal of Science&Technology,2004,28(B1):9-20.
[6]Yang Yang,Ou Jinping.Parameter analysis for instantaneousoptimal control of structures[J].World Earthquake Engi-neering,2004,20(3):25-32
[7]Du Yongfeng,Liu Yanhui,Li Hui.An improved algorithm forinstantaneous optimal control of structures subjected to seis-mic excitation[J].Earthquake Resistant Engineering andRetrofitting,2007,29(1):8-12.
[8]Tong Shaowei,Yang Yiren,Tang Huaiping.Analysis on seis-mic response of high-rise structure using base isolation[J].Journal of Sichuan University:Engineering Science Edition,2011,43(Supp2):183-187.[童少伟,杨翊仁,唐怀平.采用基础隔震的高层建筑地震响应分析[J].四川大学学报:工程科学版,2011,43(增2):183-187.]
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