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Trust-region based instantaneous optimal semi-active control of longspan spatially extended structures with MRF-04K damper

ISSN号：1671-3664
期刊名称：《地震工程与工程振动：英文版》
时间：0
分类：P315[天文地球—地震学;天文地球—固体地球物理学;天文地球—地球物理学]
作者机构：[1]School of Civil Engineering, Tianjin University, Tianjin 300072, China, [2]Tianjin Key Laboratory of Civil Engineering Structures and New Materials, Tianjin 300072, China
相关基金：Supported by： National Science Fund for Distinguished Young Scholars of China Under Grant No. 50425824 and the National Natural Science Foundation of China Under Grant No. 50578109, 90715034 and 90715032 The authors acknowledge the financial support from the National Science Fund for Distinguished Young Scholars of China under grant number 50425824, and the National Natural Science Foundation of China under grant numbers 50578109, 90715034 and 90715032.

作者： Lin Wei[1], Li Zhongxian[1,2], Ding Yang[1,2]

关键词：地震, 区域, 活动, 控制, long-span spatially extended structure instantaneous optimal control semi-active control trust-regionmethod magnetorheological （MR） damper bounded constraint optimization, modified Bouc-Wen model, clipped-optimal control

中文摘要：

在土木工程学的域里，基于阻尼的半活跃的控制系统收到了的 magnetorheological 液体(MRF ) 为在保护结构免受象强震和高度那样的自然危险的伤害的使用的可观的注意弯屈。在这篇论文， MRF 基于阻尼的半活跃的控制系统被用于长跨度的空间地扩大的结构，它的可行性被讨论。同时，一个信任区域方法基于即时最佳的半活跃的控制算法(TIOC ) 被建议处于一种多重更潮湿的状况改进半活跃的控制系统的性能。建议 TIOC 把控制过程描述为一个围住的限制优化问题，在哪个最佳的半活跃控制力量向量被信任区域方法在最小化结构的回答的每控制步解决。与 MRF-04K 水坝 pers 安装的火车站房顶结构的一个数字例子被举。首先，一个修改 Bouc 皮脂腺囊瘤模型被利用描述选择 MRF-04K 的行为更潮湿。然后，包括著名片断最佳的控制器和建议 TIOC 控制器，二个半活跃的控制系统被考虑。基于长跨度的空间地扩大的结构的特征，控制系统的性能与不同明显的速度在一致地震刺激和旅行波浪刺激下面被评估。模拟结果显示基于阻尼的半活跃的控制系统有的 MR 液体在地震下面减轻照原尺寸的长跨度的空间地扩大的结构的回答的潜力冒险。建议 TIOC 控制器的优势被为几个不同盒子把它的控制有效性与片断最佳的控制器作比较表明。

英文摘要：

In the field of civil engineering, magnetorheological fluid （MRF） damper-based semi-active control systems have received considerable attention for use in protecting structures from natural hazards such as strong earthquakes and high winds. In this paper, the MRF damper-based semi-active control system is applied to a long-span spatially extended structure and its feasibility is discussed. Meanwhile, a _trust-region method based instantaneous optimal semi-active control algorithm （TIOC） is proposed to improve the performance of the semi-active control system in a multiple damper situation. The proposed TIOC describes the control process as a bounded constraint optimization problem, in which an optimal semi- active control force vector is solved by the trust-region method in every control step to minimize the structural responses. A numerical example of a railway station roof structure installed with MRF-04K dampers is presented. First, a modified Bouc- Wen model is utilized to describe the behavior of the selected MRF-04K damper. Then, two semi-active control systems, including the well-known clipped-optimal controller and the proposed TIOC controller, are considered. Based on the characteristics of the long-span spatially extended structure, the performance of the control system is evaluated under uniform earthquake excitation and travelling-wave excitation with different apparent velocities. The simulation results indicate that the MR fluid damper-based semi-active control systems have the potential to mitigate the responses of full-scale long-span spatially extended structures under earthquake hazards. The superiority of the proposed TIOC controller is demonstrated by comparing its control effectiveness with the clipped-optimal controller for several different cases.

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