NDLI: A Study on Predictions of Fully Nonlinear Motion Aircushion Type Floating Structures Using 2D MPS Method

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Masuda, Mitsuhiro Ikoma, Tomoki Masuda, Koichi Maeda, Hisaaki
Copyright Year	2008
Abstract	Very large floating structures (VLFSs) have been proposed for new ocean space utilization and many researches have been carried out. VLFSs are elastically deformed due to ocean waves because the rigidity of the structure decreases relatively. The authors examine the aircushion type floating structure in order to reduce hydroelastic motion. An aircushion type floating structure to which air-chambers are installed can reduce the wave drifting force and hydroelastic motion at the same time. Most theoretical calculations of motion of aircushion type floating structures in water waves have been done based on a linear potential theory so far. As a result, the utility of the aircushion has been proved. However fully nonlinear phenomena such as deck wetness, slamming and air-leakage cannot be investigated by using existing calculations based on the linear theory. In this study, a computer program code of the two-dimensional MPS method that can consider fully nonlinear influence is developed and then the air layer inside an aircushion is expressed with particles of the MPS. Moreover, the numerical technique for introducing directly the mooring force into the motion equation of the particle is developed. Motion response of aircushion type floating structures in a billow is computed. As a result, the usefulness of this numerical calculation method is confirmed.
Sponsorship	Ocean, Offshore and Arctic Engineering Division
Starting Page	477
Ending Page	482
Page Count	6
File Format	PDF
ISBN	9780791848234
DOI	10.1115/OMAE2008-57387
e-ISBN	0791838218
Volume Number	Volume 6: Nick Newman Symposium on Marine Hydrodynamics; Yoshida and Maeda Special Symposium on Ocean Space Utilization; Special Symposium on Offshore Renewable Energy
Conference Proceedings	ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering
Language	English
Publisher Date	2008-06-15
Publisher Place	Estoril, Portugal
Access Restriction	Subscribed
Subject Keyword	Leakage Computational methods Computer software Mooring Equations of motion Floating structures Water waves Wave drift forces Particulate matter Ocean waves Potential theory (physics) Stiffness Ocean space utilization
Content Type	Text
Resource Type	Article

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A Prediction Method of Hydroelastic Motion of Aircushion Type Floating Structures Considering With Draft Effect Into Hydrodynamic Forces

The Effect of Aircushion Division on the Motions of Large Floating Structures

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