Abstract
This paper deals with the slamming phenomenon experienced by ships during impact between the bow and the water free surface. Slamming loads on ships may be sufficiently important to induce plastic deformation of the hull external structure. For extreme loading cases, they have been identified as the cause of ship loss. The problem to be solved is transient and highly nonlinear due to the complex water flow conditions. In the present paper, the three-dimensional Wagner problem is solved numerically using the finite element method. A numerical analysis is performed for both rigid and deformable structures. After this numerical analysis, an original experimental investigation is presented. It consists of a series of free fall drop-tests of rigid and deformable cone-shaped samples with different deadrise angles and thickness. Distribution and evolution of pressure are analyzed. Finally, our numerical results are successfully compared with experimental data.
Highlights
Rough sea conditions can induce high-amplitude ship motions. Different factors, such as boat speed, heading and sea state, may cause the emergence of the ship bow from the water. In this context, slamming refers to the hydrodynamic impact between the water free surface and the hull as the bow re-enters the incoming wave
Interest in the subject has been revived by the advent of new types of high-speed vessels, such as hydrofoils, small waterplane area twin hull (SWATH), sea effect surface (SES) boats and hovercraft
We presented a numerical approach for solving two-dimensional and three-dimensional slamming problems
Summary
Different factors, such as boat speed, heading and sea state, may cause the emergence of the ship bow from the water In this context, slamming refers to the hydrodynamic impact between the water free surface and the hull as the bow re-enters the incoming wave. Interest in the subject has been revived by the advent of new types of high-speed vessels, such as hydrofoils, small waterplane area twin hull (SWATH), sea effect surface (SES) boats and hovercraft. The speed of these boats reaches 35–40 knots and results in particular ship motion behaviour. For three-dimensional problems, first-order analytical solutions have only been established for particular solid shapes (Korobkin, 1985; Scolan and Korobkin, 2001)
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