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基于时频分析的半主动TMD风振控制研究初探

发表时间:2010-01-31  浏览量:1946  下载量:810
全部作者: 尹飞,谭平,黄东阳,周福霖
作者单位: 广州大学工程抗震研究中心;哈尔滨工业大学深圳研究生院
摘 要: 利用短时最大熵谱谱阵分析方法(maximum entropy method, MEM)识别风振作用下的结构振动这种变频信号在较短时间序列中的时频-功率谱特性调整调谐装置的振动频率,提出基于时频分析的半主动(semi-active, SA)调谐减振控制策略,以达到更优异的减振效果。采用自回归(auto-regressive, AR)模型模拟了基于Davenport谱的脉动风速时程,运用基于时频分析的半主动变刚度调谐减振控制策略,选取一幢26层、103.5 m高的高层建筑为仿真算例,结果表明控制效果良好,明显优于被动调谐质量阻尼器(tuned mass damper, TMD)。
关 键 词: 工程结构;时频分析;半主动变刚度调谐质量阻尼器;高层建筑;风振控制
Title: Preliminary research of Semi-Active-TMD based on time-frequency analysis in wind-excited control
Author: YIN Fei, TAN Ping, HUANG Dongyang, ZHOU Fulin
Organization: Earthquake Engineering Research Test Center, Guangzhou University;Shenzhen Graduate School, Harbin Institute of Technology
Abstract: This paper proposes a novel tuned control strategy for SA-TMD based on time-frequency analysis. Short time maximum entropy methods were used to identify the time-frequency-power spectrum of the structure vibration signal which is frequency variable on real-time. It is effective to adjust the frequency of the tuned device according to this measure. Fluctuating wind was simulated by AR model based on Davenport spectrum. Selected a 26-storey, 103.5-meter-high high-rise building controlled by SA base on time-frequency analysis control strategy. The numerical simulation result shows good effect, and much better than a passive tuned mass damper(TMD).
Key words: engineering structures; time-frequency analysis; semi-active variable stiffness tuned; high-rise building; wind control
发表期数: 2010年1月第2期
引用格式: 尹飞,谭平,黄东阳,等. 基于时频分析的半主动TMD风振控制研究初探[J]. 中国科技论文在线精品论文,2010,3(2):128-132.
 
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