Numerical analysis of vortex-induced vibrations of a slender flexible riser under platform motions

Hao Hu, Di Deng, Decheng Wan, Changhong Hu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

With influence of current, the platform and the connected riser form relative motion in the flow. In this paper, A computational fluid dynamics (CFD) model is built by strip theory and Bernoulli–Euler bending beam model. Based on this numerical model, the platform motions and corresponding current velocities are employed to investigate the responses of the riser. The numerical results indicate that the dominant crossflow and inline vibration modes are increased with the current velocity. The amplitudes of crossflow and inline vibration modes show periodic variations with the increase in the amplitude of the surge motion and the current velocity. The similar vortex shedding mode in the uniform flow is observed during vortex-induced vibrations of riser under the low frequency platform motions.

Original languageEnglish
Title of host publicationProceedings of the 31st International Ocean and Polar Engineering Conference, ISOPE 2021
PublisherInternational Society of Offshore and Polar Engineers
Pages2015-2020
Number of pages6
ISBN (Print)9781880653821
Publication statusPublished - 2021
Event31st International Ocean and Polar Engineering Conference, ISOPE 2021 - Virtual, Online
Duration: Jun 20 2021Jun 25 2021

Publication series

NameProceedings of the International Offshore and Polar Engineering Conference
ISSN (Print)1098-6189
ISSN (Electronic)1555-1792

Conference

Conference31st International Ocean and Polar Engineering Conference, ISOPE 2021
CityVirtual, Online
Period6/20/216/25/21

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Ocean Engineering
  • Mechanical Engineering

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