Numerical simulation of wave-induced nonlinear motions of a two-dimensional floating body by the moving particle semi-implicit method
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The moving particle semi-implicit (MPS) method was applied to compute nonlinear motions of a floating body influenced by the water on deck. To compute the motions of a rigid body, the fluid pressure at the position of each particle on the body surface was directly integrated in space and the equations of translational and rotational motions were integrated in time to determine the correct position of the rigid-body surface at each time step of the time-domain calculation. The performance of this method was validated through a comparison with measured results in an experiment that was newly conducted using a model of a box-shaped floating body with a small freeboard. Although the overall agreement was good, some discrepancies were observed for a shorter wave period, especially for the drift motion in sway. The effect of numerical resolution on the results was checked by changing the number of particles. With a higher number of particles, no obvious improvement was seen in the global body motions, but the resolution of the local free-surface profile, including the water on deck, was improved.
Key wordsMPS method Particle method Nonlinear motions Water on deck Free surface Hydrodynamic forces Drift motion
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- 2.Tanizawa K (1996) Nonlinear simulation of floating body motions in waves. In: Chung JS, Olagnon M, Kim CH (eds) The proceedings of the 6th international offshore and polar engineering conference, vol III. ISOPE, Golden, CO, USA, pp 414–420Google Scholar
- 3.Amagi K, Kimura N, Ueno K (1994) On the practical evaluation of shallow water effect in large inclinations for small fishing boats. In: Proceedings of the 5th international conference on stability of ships and ocean vehicles. Florida Tech, Melbourne, Florida, USAGoogle Scholar
- 4.Francescutto A, Armenio V, Rocca, ML (1996) On the roll motion of a ship with partially filled unbaffled and baffled tanks: numerical and experimental investigation. In: The proceedings of the 6th international offshore and polar engineering conference, vol III. ISOPE Golden, CO, USA, pp 377–386Google Scholar
- 5.Hu C, Kishev Z, Kashiwagi M, et al (2006) Application of CIP method for strongly nonlinear marine hydrodynamics. Ship Technol Res 53:74–87Google Scholar
- 8.Koshizuka S, Oka Y (1996) Moving particle semi-implicit method for fragmentation of incompressible fluid. Nucl Sci Eng 123:421–434Google Scholar