Abstract
Analysis of the dynamic response of ships in accident scenarios requires a realistic idealisation of environmental and operational conditions by multi-physics models. This paper presents a procedure that simulates the influence of strongly coupled FSI effects on the dynamic response of ships involved in typical collision and grounding events. Our method couples an explicit 6-DoF structural dynamic finite element scheme with a hydrodynamic method accounting for (a) 6-DoF potential flow hydrodynamic actions; (b) the influence of evasive ship speed in the way of contact and (c) the effects of hydrodynamic resistance based on a RANS CFD model. Multi-physics simulations for typical accident scenarios involving passenger ships confirm that suitable FSI modelling may be critical for either collision or grounding events primarily because of the influence of hydrodynamic restoring forces.
Highlights
Ships in operation are exposed to various accidents that in turn may lead to serious Health, Safety and Environment (HSE) damages
This paper presents a pro cedure that simulates the influence of strongly coupled FSI effects on the dynamic response of ships involved in typical collision and grounding events
This paper explored the influence of multi-physics on the dynamic response of passenger ships subject to collision and grounding accidents
Summary
Ships in operation are exposed to various accidents (e.g. collisions, groundings, fires, explosions, etc.) that in turn may lead to serious Health, Safety and Environment (HSE) damages. The effects of collision parameters on structural response characteristics have been studied by other authors such as [14, 29,30,31] and [11] All these models consider only part of the ship (e.g., 1–2 cargo holds, bottom/side structures, etc.) and apply restrictions in 6 Degree of Freedom (DoF) structural dynamics. In this paper we introduce a 3D FSI model that combines the influence of 6-DoF seakeeping/manoeuvring and ship resistance with an explicit FEM scheme Along these lines we present a novel and practical procedure that models the combined effects of ship dy namics in waves on ship crashworthiness and dynamic response (see section 2 and Table 1). Applied examples of relevance focus on passenger ships subject to typical collision and grounding events are presented (see section 3) with the aim to conclude the influence of realistic multi-physics assumptions on dynamic response (see section 5)
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