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    題名: A Time-Domain Viscous Damping Model Based on Frequency-Dependent Damping Ratios
    作者: Chang, D. W.;Roesset, J. M.;Wen, C. H.
    貢獻者: 淡江大學土木工程學系
    關鍵詞: Time-domain integration;Damping coefficient;Fourier transform;Impulse–response method;Equivalent damping ratios;Impedance functions
    日期: 2000-12
    上傳時間: 2013-04-16 09:52:37 (UTC+8)
    出版者: Kidlington: Pergamon
    摘要: This paper introduces the mathematics and procedures used in developing a time-dependent damping model for integration analyses of structural response. To establish the time-dependent viscous damping model, frequency-dependent damping ratios of the structure under a series of steady-state unit impulses corresponding to actual loads are first calculated. For simplicity, the ratios can be incorporated with the static stiffness of the structure to model approximately the impulse induced damping spectrum. According to the nature of the problem, these ratios can be calculated from the theoretical impedance functions and experimental observations. With the computed damping spectrum, the damping coefficient in the time domain can be obtained with the Fourier transform technique. Adopting the impulse–response method, the damping can be modeled rationally through integration with changing loads. Numerical examples are presented to show the feasibility of this model while the transform criterion is satisfied.
    關聯: Soil Dynamics and Earthquake Engineering 19(8), pp.551-558
    DOI: 10.1016/S0267-7261(00)00072-5
    顯示於類別:[土木工程學系暨研究所] 期刊論文

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