TMD减振结构的主结构模态参数识别研究
首发时间:2019-01-25
摘要:调谐质量阻尼器(Tuned Mass Damper, TMD)是最常用的一种被动控制系统。由于TMD会对结构模态参数产生影响,通过传统的频域分析或模态识别方法,只能获得控制系统(包括了主结构和TMD)的模态信息。本文基于系统的输出反馈,将TMD对主结构的作用力简化为作用在主结构上的外荷载,TMD的质量设定为待定的物理量,引入到系统的状态空间矩阵中,再通过子空间识别方法同时获得主结构的模态参数信息和TMD的质量参数。最后,分别通过数值模拟和缩尺模型试验验证了该算法的有效性。
关键词: TMD,模态参数识别,子空间 数值模拟 缩尺试验
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Modal identification of main frames with a tuned mass damper
Abstract:Tuned Mass Damper (TMD) is one of the most commonly used passive control systems. However, due to the influence of TMD on structural modal parameter, traditional frequency domain analysis and modal identification method can only bring out global modal information of the control system. In this paper, based on output feedback, the force of TMD to main structure is simplified to an external load on the main structure, the quality of the TMD is set to be an undetermined physical quantity, and the above data is introduced into the state space matrix of the system, and also parameters of the main structure and quality parameter of TMD are obtained through subspace identification. Finally, numerical simulations and scale model tests are conducted to demonstrate the effectiveness of the proposed algorithm.
Keywords: TMD modal parameter identification subspace numerical simulation scale test
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