Determination of Hydrodynamic Coefficients of Moonpool from Free Decay and Forced Oscillation Tests Including the Influence of Damping Plates

ABSTRACT: The paper presents Reynolds-Averaged Navier–Stokes (RANS) simulations of a hull with a moonpool, aiming to determine its hydrodynamic coefficients and to evaluate the effect of damping plates. Simulations included the response of the floating body in head waves as well as free decay and forced oscillation tests. From these tests, added mass and damping coefficients of the moonpool were determined and analysed. Special attention was given to the application of additional horizontal damping plates installed at the moonpool entrance. The results demonstrate that the non-dimensional damping coefficient exhibits an approximately linear relationship with the degree of inlet area blockage caused by the plates. Furthermore, the influence of the excitation wave amplitude on the amplification factor was investigated, revealing that the factor decreases with increasing wave amplitude. These findings provide new insights into the hydrodynamic behaviour of moonpools and may support the design of offshore vessels and floating platforms equipped with such structures.

KEYWORDS: Safety of Navigation, Risk Assessment, Numerical Simulation, Hydrodynamic Coefficients, Offshore Industry, Methods and Algorithms, Moonpool, RANS-CFD

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Citation note:

Ciba E., Jurczyński M., Dymarski P.: Determination of Hydrodynamic Coefficients of Moonpool from Free Decay and Forced Oscillation Tests Including the Influence of Damping Plates. TransNav, the International Journal on Marine Navigation and Safety of Sea Transportation, Vol. 20, No. 2, doi:10.12716/1001.20.02.21, pp. 475-481, 2026

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Authors in other databases:

Ewelina Ciba:

Michał Jurczyński:

Paweł Dymarski: ORCID iD icon

orcid.org/0000-0002-6033-0461 Scopus icon

15047671100

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