Comparison of nonlinear one- and two-way FFSI methods for the prediction of the symmetric response of a containership in waves

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Abstract

This paper presents an investigation on the symmetric motions and loads of the S-175 containership undergoing severe green water impact that may result in high frequency whipping. Symmetric dynamic response results from two Flexible Fluid Structure Interaction approaches, namely one- and two-way coupling methods are assessed and compared in regular head waves. Numerical computations are performed by coupling CFD (Star-CCMþ) and FEA (Abaqus). The creative meshing strategy adopted for RANS CFD simulations is presented and numerical predictions are compared against experimental measurements over a range of wave frequencies. It is concluded that heave, pitch and the linear wave frequency component in the wave loads are predicted well by the two approaches. However, overall two-way coupling compares better with measurements and a significant difference between the two different methods is especially noted in the high-frequency whipping domain. It is concluded that one-way coupling underestimates the high-frequency vibratory components and therefore care must be enforced when applying this method for calculating hydroelastic responses in waves.

Details

Original languageEnglish
Article number107179
Number of pages17
JournalOcean Engineering
Volume203
Publication statusPublished - 1 May 2020
MoE publication typeA1 Journal article-refereed

    Research areas

  • Finite element analysis (FEA), Flexible fluid structure interactions (FFSI), Hydroelasticity of ships, Reynolds averaged Navier Stokes computational fluid dynamics (RANS CFD), Wave loads

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