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TMD的减振效果对调谐频率的波动十分敏感,而在实际工程中其频率很难达调谐到最优,这导致其有效性明显降低。有鉴于此,本文立足于双调谐质量阻尼器(DMTD)及多重调谐质量阻尼器(MTMD)研究理论,通过SAP2000软件建立结构整体模型,并采用集中质量的方式模拟煤斗重量,研究了将DTMD、2重TMD、5重TMD调谐策略应用于某大型火电厂房煤斗,由于DTMD在Y向的作用退化为TMD,主要分析其单向(X向)动力反应的减震效果。结果表明,DTMD对结构X向的减震效果优于2重TMD及5重TMD;2重TMD及5重TMD对于结构X向及Y向位移响应均具有一定的减震效果,对于煤斗层及顶层也存在失效情况;罕遇地震作用下,DTMD的残余变形要小于2重TMD和5重TMD。
The damping effect of TMD is very sensitive to the fluctuation of tuning frequency, but its frequency can not be tuned optimally in actual engineering, which leads to the obvious decrease of its effectiveness. In view of this, based on the theory of double tuned mass damper (DMTD) and multiple tuned mass damper (MTMD), this paper builds the overall structure model by using SAP2000 software and simulates the weight of coal hopper by using concentrated mass method. , 2 TMD and 5 TMD tuning strategies are applied to the coal hopper in a large thermal power plant. Due to the DTMD degradation in the Y direction to TMD, the damping effect of the unidirectional (X-directional) dynamic response is mainly analyzed. The results show that the damping effect of DTMD on structure X direction is better than that of 2-TMD and 5-TMD. The 2-TMD and 5-TMD have some damping effects on the X-and Y-displacement responses of the structure. And the top layer also have the failure condition. The residual deformation of DTMD is less than that of 2-TMD and 5-TMD under the rare earthquake.