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Hydrodynamic Response of Ocean-Towed Cable-Array System under Different Munk Moment Coefficients

Author

Listed:
  • Dapeng Zhang

    (College of Ocean Engineering, Guangdong Ocean University, Zhanjiang 524088, China)

  • Bowen Zhao

    (Ocean College, Zhejiang University, Zhoushan 316000, China)

  • Keqiang Zhu

    (Faculty of Maritime and Transportation, Ningbo University, Ningbo 315211, China)

Abstract

The ocean towing system plays an important role in the ocean development process. The motion of a towed body is closely coupled with the motion of a towing cable. In this paper, the lumped mass method is used to discrete a towing cable into a lumped mass model. At the same time, on the basis of some assumptions, the relationship between the expression of Munk moments in the classical towed body kinematics and the expression of the Munk moments in the hydrodynamic analysis software OrcaFlex is established. Based on the above assumptions and the derivation, combined with the specific parameters of a certain sea state and a certain towing system, the dynamic simulation of the towing system is made by OrcaFlex. By changing the different Munk moment coefficients, the real-time response of the cable tension and the towed underwater body under different Munk moments is achieved. The effects of different Munk moment coefficients on the change of the tension are obtained; the six degrees of freedom of the towed body under the action of different Munk moment coefficients are shown. To obtain the spectral density of the six degrees of freedom of the towed body under the action of different Munk moment coefficients, Fast Fourier Transform is performed on the calculated results of the towed body in the time domain. The results provide a theoretical basis for the optimal design of a cable and towed body.

Suggested Citation

  • Dapeng Zhang & Bowen Zhao & Keqiang Zhu, 2022. "Hydrodynamic Response of Ocean-Towed Cable-Array System under Different Munk Moment Coefficients," Sustainability, MDPI, vol. 14(3), pages 1-18, February.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:3:p:1932-:d:744608
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    References listed on IDEAS

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    1. Rentschler, Manuel U.T. & Adam, Frank & Chainho, Paulo, 2019. "Design optimization of dynamic inter-array cable systems for floating offshore wind turbines," Renewable and Sustainable Energy Reviews, Elsevier, vol. 111(C), pages 622-635.
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