Parametric Vibration of Submerged Floating Tunnel Tether Under Random Excitation

Abstract：For the study of the parametric vibration response of submerged floating tunnel tether under random excitation, a nonlinear random parametric vibration equation of coupled tether and tube of submerged floating tunnel is set up. Subsequently, vibration response of tether in the tether-tube system is analyzed by Monte Carlo method. It may be concluded that when the tube is subjected to zero-mean Gaussian white noise random excitation, the displacement and velocity root mean square responses of tether reach the peak if the circular frequency of tube doubles that of tether; the displacernent and velocity root mean square responses of tether increase as the random excitation root mean square increases; owing to the damping force of water, the displacement and velocity root mean square responses of tether decrease rapidly compared with tether in air; increasing the damping of the tether or tube reduces the displacement and velocity root mean square responses of tether; the large-amplitude vibration of tether may be avoided by locating dampers on the tether or tube. 作者： Author： SUN Sheng-nan  SU Zhi-bin 作者單位： School of Architecture and Civil Engineering, Liaocheng University, Liaocheng 252059, China 期 刊： 中國海洋工程(英文版)   ISTICEISCI Journal： CHINA OCEAN ENGINEERING 年，卷(期)： 2011, 25(2) 分類號： P756.2 Keywords： ocean engineering    submerged floating tunnel    tether    parametric vibration    random excitation    機(jī)標(biāo)分類號： TU3 TH1 機(jī)標(biāo)關(guān)鍵詞： parametric vibration    vibration response    velocity    root    Gaussian white noise    damping force    Monte Carlo    study    reach    set    air 基金項(xiàng)目： This work is financially supported by the Promotive Research Fund for Excellent Young and Middle-aged Scientists of Shandong Province

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