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Response prediction of long flexible risers subject to forced harmonic vibration

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Abstract

Several research efforts have been directed toward the development of models for response prediction of flexible risers. The main difficulties arise from the fact that the dynamic response of flexible risers involves highly nonlinear behavior and a self-regulated process. This article presents a quasi-steady approach for response prediction of oscillating flexible risers. Amplitude-dependent lift coefficients are considered, as is an increased mean drag coefficient model during synchronization events. Experimental validation of the proposed model was carried out using a 20-m riser model excited by forced harmonic vibration at its top end. Large variations in the hydrodynamic force coefficients, a low mass ratio value, and synchronization events are the main features of the model presented in this article. Experimental validation was provided for the asymmetric, transverse, diagonal, and third vortex regimes.

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Authors and Affiliations

  1. Department of Civil and Earth Resources Engineering, Kyoto University, Katsura Campus, Nishikyo-ku, Kyoto, 615-8540, Japan

    Carlos Alberto Riveros & Tomoaki Utsunomiya

  2. Deep Sea Technology Research Group, National Maritime Research Institute, 6-38-1 Shinkawa, Mitaka, Tokyo, 181-0004, Japan

    Katsuya Maeda

  3. Marine Technology and Development Program, Marine Technology Center, JAMSTEC, 2-15 Natushima-cho, Yokosuka, 237-0061, Japan

    Kazuaki Itoh

Authors
  1. Carlos Alberto Riveros
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  2. Tomoaki Utsunomiya
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  3. Katsuya Maeda
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  4. Kazuaki Itoh
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Corresponding author

Correspondence to Tomoaki Utsunomiya.

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Riveros, C.A., Utsunomiya, T., Maeda, K. et al. Response prediction of long flexible risers subject to forced harmonic vibration. J Mar Sci Technol 15, 44–53 (2010). https://doi.org/10.1007/s00773-009-0070-5

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  • DOI: https://doi.org/10.1007/s00773-009-0070-5

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