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A PANEL METHOD APPLIED TO HYDRODYNAMIC ANALYSIS OF TWIN-HULL SHIPS

Thomas E. Schellin, Helge Rathje

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Abstract

A three-dimensional panel method is presented to predict motions and wave induced sea loads of twin-hull ships. Pulsating sources are distributed on the ship's mean wetted surface. Horseshoe vortices are distributed on the vertical centre-plane of each hull and its wake to account for horizontal lift forces. The pressure equality Kutta condition is enforced on both sides of the trailing edge of each hull. Additional terms in the motion equations account for effects of viscous lift and viscous damping on hulls and lift and drag on stabilizing fins.

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What this paper is about

A three-dimensional panel method is presented to predict motions and wave induced sea loads of twin-hull ships. Pulsating sources are distributed on the ship's mean wetted surface. Horseshoe vortices are distributed on the vertical centre-plane of each hull and its wake to account for horizontal lift forces. The pressure equality Kutta condition is enforced on both sides of the trailing edge of each hull. Additional terms in the motion equations account for effects of viscous lift and viscous damping on hulls and lift and drag on stabilizing fins.

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Available abstract

A three-dimensional panel method is presented to predict motions and wave induced sea loads of twin-hull ships. Pulsating sources are distributed on the ship's mean wetted surface. Horseshoe vortices are distributed on the vertical centre-plane of each hull and its wake to account for horizontal lift forces. The pressure equality Kutta condition is enforced on both sides of the trailing edge of each hull. Additional terms in the motion equations account for effects of viscous lift and viscous damping on hulls and lift and drag on stabilizing fins.

Key concepts: Hull, Wake, Lift (data mining), Drag, Marine engineering, Trailing edge, Mechanics, Lift-to-drag ratio

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