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Date:2022-08-29

Indexed by:Journal Article

Date of Publication:2022-06-30

Journal:大连海事大学学报

Issue:4

Page Number:86-90

ISSN:1006-7736

Abstract:A mathematical equation of submerged floating tunnel tether vibration under the effects of vortex and parametric excitation was presented to investigate the importance of its high-order vortex-induced lock-on vibration. Multi-step Galerkin method was used to simplify this equation and then fourth-order Runge-Kuta integration method was used for numerical analysis. Finally, multi-order vortex-induced vibration response of submerged floating tunnel tether subjected to current was analyzed in a few numerical examples. The results show that, when the vortex acts separately, modal response of tether decreases as the order of lock-on increases, and the modal response of the order where lock-on occurs is the biggest, whereas that of the other two orders are small; when parametric excitation acts separately, the similar thing happens, and high-order vortex-induced lock-on of tether should not be ignored; whether the lock-on takes place or not doesn't have a significant influence on the parametric vibration of tether, and vortex-induced vibration of tether merely supplies a constant disturbance to parametric vibration.

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