Multispan classification methods and interaction mechanism of submarine pipelines undergoing vortex-induced vibration

Xu, Wanhai; Jia, Kun; Ma, Yanfei; Wang, Yingying; Song, Zhiyou

doi:10.1016/j.apor.2021.103027

Cited by 13 publications

(1 citation statement)

References 30 publications

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“…Currently, VIV is mainly studied by scholars around the world in the simulation of cylindrical and marine suspended span pipelines [15][16][17]. However, there are few studies on the VIV of submarine cables.…”

Section: Introductionmentioning

confidence: 99%

Fluid–structure interaction simulation and optical fibre stress analysis of submarine cables in vortex‐induced vibration

Tan,

Hao,

Zhang

et al. 2024

IET Generation Trans & Dist

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Under the current scouring, submarine cables are prone to be exposed, suspended, and even vortex‐induced vibration (VIV), threatening their mechanical and electrical properties. In this contribution, a finite element simulation model of 110‐kV single‐core optical fibre composite submarine cable is established. The natural frequency and resonant frequency of the model are obtained through wet mode analysis and harmonic response analysis. Then the VIV is simulated by the fluid–structure coupling method. Moreover, the stress extraction method of the torsional optical fibre position under the VIV is proposed. The results show that when the reduced speed is 2.57, the submarine cable appears beating vibration, which is composed of two vibrations with similar frequencies. When the reduced speed is 7.08, the vibration frequency is about 7.813 Hz, causing a rapid increase in vibration amplitude. The stress distribution of the torsional optical fibre presents a mirror image relationship at two moments separated by half a vibration cycle. Also, the frequency of stress change is the same as the frequency of VIV, which can judge whether the VIV occurs. The VIV range and position can be determined by the location where the stress changes the most.

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Section: Introductionmentioning

confidence: 99%

Fluid–structure interaction simulation and optical fibre stress analysis of submarine cables in vortex‐induced vibration

Tan,

Hao,

Zhang

et al. 2024

IET Generation Trans & Dist

View full text Add to dashboard Cite

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Parametric resonance of axially functionally graded pipes conveying pulsating fluid

Jing,

Mao,

Ding

et al. 2024

Appl. Math. Mech.-Engl. Ed.

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Based on the generalized Hamilton’s principle, the nonlinear governing equation of an axially functionally graded (AFG) pipe is established. The non-trivial equilibrium configuration is superposed by the modal functions of a simply supported beam. Via the direct multi-scale method, the response and stability boundary to the pulsating fluid velocity are solved analytically and verified by the differential quadrature element method (DQEM). The influence of Young’s modulus gradient on the parametric resonance is investigated in the subcritical and supercritical regions. In general, the pipe in the supercritical region is more sensitive to the pulsating excitation. The nonlinearity changes from hard to soft, and the non-trivial equilibrium configuration introduces more frequency components to the vibration. Besides, the increasing Young’s modulus gradient improves the critical pulsating flow velocity of the parametric resonance, and further enhances the stability of the system. In addition, when the temperature increases along the axial direction, reducing the gradient parameter can enhance the response asymmetry. This work further complements the theoretical analysis of pipes conveying pulsating fluid.

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Dynamics of axially functionally graded pipes conveying fluid

et al. 2023

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Multispan classification methods and interaction mechanism of submarine pipelines undergoing vortex-induced vibration

Cited by 13 publications

References 30 publications

Fluid–structure interaction simulation and optical fibre stress analysis of submarine cables in vortex‐induced vibration

Fluid–structure interaction simulation and optical fibre stress analysis of submarine cables in vortex‐induced vibration

Parametric resonance of axially functionally graded pipes conveying pulsating fluid

Dynamics of axially functionally graded pipes conveying fluid

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