摘要
MR阻尼器能提供可以调节的阻尼力,适合用作减少结构地震响应的半主动控制器。本文对MR阻尼器的半主动控制进行研究,提出了状态跳跃控制算法,根据结构响应的大小实现MR阻尼器的状态切换,使结构响应得到有效的控制。这种控制策略简便,不需要在线计算,便于实施。由于速度响应直接影响MR阻尼器的阻尼力,建议用速度响应作为MR阻尼器进行状态切换的变量。文中给出了两个算例,进行了计算分析和比较,说明了状态跳跃控制算法的特点。
MR damper can provide variable damping forces. It is suitable to be used as semi-active controller to reduce seismic response of structures. In this paper, the semi-active control for MR dampers was studied, and the state-jump control algorithm was presented. The on/off state of MR dampers will be changed by structural response in order to effectively control the structural response. This control strategy is simple and easy to be realized without any on-line calculation. As the damping force of MR dampers is greatly influenced by the velocity response, the velocity response was suggested here as the state-jump parameter for MR dampers. Two examples were given in this paper. The results of numerical analysis and comparison demonstrate the characteristics of state-jump control algorithm.
出处
《力学季刊》
CSCD
北大核心
2001年第4期471-476,共6页
Chinese Quarterly of Mechanics
基金
上海市建设技术发展基金
