淡江大學機構典藏:Item 987654321/69819
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    題名: Multiple tuned mass dampers for controlling coupled buffecting and flutter of lon-span bridges
    作者: Lin, Y. Y.;Cheng, Chii-ming;Lee, C. H.
    貢獻者: 淡江大學土木工程學系
    關鍵詞: multiple tuned mass dampers;buffeting;flutter;long-span bridge
    日期: 1999-12-01
    上傳時間: 2011-10-23 20:11:21 (UTC+8)
    摘要: Multiple tuned mass dampers are proposed to suppress the vertical and torsional buffeting and to increase the aerodynamic stability of long-span bridges. Each damper has vertical and torsional frequencies, which are tuned to the corresponding frequencies of the structural modes to suppress the resonant effects. These proposed dampers maintain the advantage of traditional multiple mass dampers, but have the added capability of simultaneously controlling vertical and torsional buffeting responses. The aerodynamic coupling is incorporated into the formulations, allowing this model to effectively increase the critical speed of a bridge for either single-degree-of-freedom flutter or coupled flutter. The reduction of dynamic response and the increase of the critical speed through the attachment of the proposed dampers to the bridge are also discussed. Through a parametric analysis, the characteristics of the multiple tuned mass dampers are studied and the design parameters - including mass, damping, frequency bandwidth, and total number of dampers - are proposed. The results indicate that the proposed dampers effectively suppress the vertical and the torsional buffeting and increase the structural stability. Moreover, these tuned mass dampers, designed within the recommended parameters, are not only more effective but also more robust than a single TMD against wind-induced vibration.
    關聯: Wind and Structures, an international journal 2(4), pp.267-284
    DOI: 10.12989/was.1999.2.4.267
    顯示於類別:[土木工程學系暨研究所] 期刊論文

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