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首页> 外文期刊>Journal of Engineering Mechanics >Wind response control of building with variable stiffness tuned mass damper using empirical mode decomposition/Hilbert transform
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Wind response control of building with variable stiffness tuned mass damper using empirical mode decomposition/Hilbert transform

机译：基于经验模态分解/希尔伯特变换的变刚度调谐质量阻尼器建筑风响应控制

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摘要

The effectiveness of a novel semiactive variable stiffness-tuned mass damper (SAIVS-TMD) for the response control of a wind-excited tall benchmark building is investigated in this study. The benchmark building considered is a proposed 76-story concrete office tower in Melbourne, Australia. It is a slender building 306 m tall with a height to width ratio of 7.3; hence, it is wind sensitive. Across wind load data from wind tunnel tests are used in the present study.The objective of this study is to evaluate the new SAIVS-TMD system, that has the distinct advantage of continuously retuning its frequency due to real time control and is robust to changes in building stiffness and damping. In comparison, the passive tuned mass damper (TMD) can only be tuned to a fixed frequency. A time varying analytical model of the tall building with the SAIVS-TMD is developed. The frenquency of the SAIVS-TMD is achieved based on empirical mode decomposition and Hilbert transform instantaneious fr6qpency algorithm developed by the writers. It is shown thafthe SAIVS-TMD can reduce the structural response substantially, when compared to the uncontrolled case, and it can reduce the response, further when compared to the case with TMD. Additionally, it is shown the SAIVS-TMD reduces response even when the building stiffness changes by +/- 15% and is robust; whereas, the TMD loses its effectiveness under such building stiffness variations. It is also shown that SAIVS-TMD can reduce the response similar to an active TMD, however, with an order of magnitude less power consumption.
机译：在这项研究中，研究了新型半主动变刚度调谐质量阻尼器（SAIVS-TMD）对风振高基准建筑物的响应控制的有效性。所考虑的基准建筑是澳大利亚墨尔本提议的76层混凝土办公大楼。它是一幢细长的建筑，高306 m，高宽比为7.3;因此，它对风敏感。本研究使用来自风洞测试的各种风荷载数据。本研究的目的是评估新的SAIVS-TMD系统，该系统具有实时控制功能，可不断重新调整频率，并且具有强大的变化能力，具有明显的优势。在建筑刚度和阻尼方面。相比之下，无源调谐质量阻尼器（TMD）只能调谐到固定频率。建立了带有SAIVS-TMD的高层建筑的时变分析模型。 SAIVS-TMD的频率是基于作者开发的经验模式分解和希尔伯特变换瞬时频率算法来实现的。结果表明，与不受控制的情况相比，SAIVS-TMD可以大大降低结构响应，而与TMD的情况相比，可以进一步降低结构响应。另外，它表明即使建筑物刚度变化+/- 15％，SAIVS-TMD也会降低响应，并且坚固耐用;然而，在这种建筑刚度变化的情况下，TMD失去了有效性。还显示出SAIVS-TMD可以类似于有源TMD一样降低响应，但是功耗要低一个数量级。

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