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MOTION AND HYDRODYNAMIC PRESSURE OF SEMI-SUBMERGED TWIN-HULL BODY IN WAVES

Fang Fang Fang Fang, M. C, Shyu, Wj

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Abstract

This paper describes the application of the strip method including the viscous damping effect on the prediction of the motion and hydrodynamic pressure for a twin-hull type semisubmersible and a SWATH ship in waves. The hydrodynamic interaction effect is generally significant for twin-hull bodies with large underwater structures and is therefore considered in this paper. Semi- submerged twin-hull bodies generally have a small water plane area which causes small wave damping and consequently the viscous effect becomes important and must be included in the calculation. With careful treatment of the interaction and viscous effect, the refined results for the dynamic response of twin-hull bodies is obtained.

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What this paper is about

This paper describes the application of the strip method including the viscous damping effect on the prediction of the motion and hydrodynamic pressure for a twin-hull type semisubmersible and a SWATH ship in waves. The hydrodynamic interaction effect is generally significant for twin-hull bodies with large underwater structures and is therefore considered in this paper. Semi- submerged twin-hull bodies generally have a small water plane area which causes small wave damping and consequently the viscous effect becomes important and must be included in the calculation. With careful treatment of the interaction and viscous effect, the refined results for the dynamic response of twin-hull bodies is obtained.

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Available abstract

This paper describes the application of the strip method including the viscous damping effect on the prediction of the motion and hydrodynamic pressure for a twin-hull type semisubmersible and a SWATH ship in waves. The hydrodynamic interaction effect is generally significant for twin-hull bodies with large underwater structures and is therefore considered in this paper. Semi- submerged twin-hull bodies generally have a small water plane area which causes small wave damping and consequently the viscous effect becomes important and must be included in the calculation. With careful treatment of the interaction and viscous effect, the refined results for the dynamic response of twin-hull bodies is obtained.

Key concepts: Hull, Mechanics, Underwater, Marine engineering, Wake, Plane (geometry), Viscous liquid, Motion (physics)

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