CFD simulations and model experiments of offshore support vessel with heavy suspended load in waves

Nowadays, since, subsea equipment becoming larger and heavier, risks of the lifting/lowering operations by offshore support vessel (OSV) are also increasing and thereby predicting coupling motions of the vessel and whirling equipment and hydrodynamic forces acting on the suspended load in splash zone are important to prevent clash accidents and damage on lifted subsea equipment etc. Model experiment using OSV with heavy suspended load was conducted in Deepsea Basin in National Maritime Research Institute (NMRI). The experiments were carried out with several regular and irregular waves and heading angles. The OSV was moored with 4 lined spring system. During the experiments, the motions of moored OSV and suspended load were measured with visual 3D motion capture system. Computation fluid dynamics (CFD) simulations were conducted using CFD Solver NAGISA which was developed in NMRI to investigate the dynamics and hydrodynamical aspects. Dynamic overset grid method and multibody dynamics model were applied to reproduce the coupling motions of the vessel and suspended load. The CFD simulations were carried out when the suspended load is in the splash zone to predict hydrodynamic forces acting on the lifted equipment. The CFD simulation results were validated with the model experiment comparing with motions of OSV and suspended load.

Subjects

Computational Fluid Dynamics (CFD)

Crane operation in wave

Multibody dynamics

Offshore construction

DDC Class

600: Technik

Lizenz

http://rightsstatements.org/vocab/InC/1.0/

Name

paper_0004_file_0407_CFD_Simulations_and_Model_Experiments_of_Offshore_Support_Vessel.pdf

Size

2.37 MB

Format

Adobe PDF

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CFD simulations and model experiments of offshore support vessel with heavy suspended load in waves