基于MR阻尼器的斜拉桥半主动控制参数优化分析

发布时间：2019-07-09 18:06

【摘要】：基于ANSYS软件平台功能建立嘉绍大桥的有限元基准模型,对嘉绍大桥进行输入方式为1(纵桥向)+0.85(横桥向)+0.65(竖桥向)的地震作用分析,采用MATLAB对MR阻尼器半主动控制系统进行设计,最后基于ANSYS和MATLAB相互调用的基础上对模型进行基于模态控制算法结合限界Hrovat最优控制的半主动振动控制模拟。针对于控制算法不同α、β参数进行控制效果参数优化分析,并分别制定7种不同控制方案。分析结果表明嘉绍大桥整体响应控制效果随控制代价即磁流变阻尼器个数的增大而增大,但是当控制代价超过一定数值时,控制效果随控制代价增大而增大的幅度越来越小。充分分析不同控制方案的控制效果及控制代价,得出最优控制方案及控制参数。
[Abstract]:Based on the function of ANSYS software platform, the finite element reference model of Jiashao Bridge is established. The seismic action of Jiaxao Bridge is analyzed with the input mode of 1 (longitudinal bridge direction) 0.85 (horizontal bridge direction) 0.65 (vertical bridge direction). The semi-active control system of MR damper is designed by MATLAB. Finally, based on the mutual call between ANSYS and MATLAB, the semi-active vibration control simulation based on modal control algorithm and bounded Hrovat optimal control is carried out. The control effect parameters of different 伪 and 尾 parameters of the control algorithm are optimized and analyzed, and seven different control schemes are worked out respectively. The analysis results show that the overall response control effect of Jiaxao Bridge increases with the increase of the control cost, that is, the number of magnetorheological dampers, but when the control cost exceeds a certain value, the increase of the control effect becomes smaller and smaller with the increase of the control cost. The control effect and control cost of different control schemes are fully analyzed, and the optimal control scheme and control parameters are obtained.
【作者单位】：东南大学混凝土及预应力混凝土结构教育部重点实验室;东南大学土木工程学院;厦门合道工程设计集团;
【基金】：国家自然科学基金(51278106、51208104)
【分类号】：U442.55;U448.27

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