Parametric vibration of submerged floating tunnel tether under random excitation |
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| Authors: | Sheng-nan Sun Zhi-bin Su |
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| Institution: | SUN Sheng-nan and SU Zhi-bin 1 School of Architecture and Civil Engineering,Liaocheng University,Liaocheng 252059,China |
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| 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 displacement 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. |
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| Keywords: | ocean engineering submerged floating tunnel tether parametric vibration random excitation |
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