Hydroelastic analysis of slamming induced impact on stiff and flexible structures by two-way CFD-FEA coupling

• Published in: Ships and offshore structures Vol. 18; no. 9; pp. 1300 - 1312
• Main Authors: Yan, Dongni, Mikkola, Tommi, Kujala, Pentti, Hirdaris, Spyros
• Format: Journal Article
• Language: English
• Published: Cambridge Taylor & Francis 02.09.2023; Taylor & Francis Ltd
• Subjects: Correlation; Finite element method; Flat plates; Flexible structures; Fluid-structure interaction; fluid-structure interactions (FSI); hydroelasticity; Impact velocity; Impingement; Loads (forces); Mechanics; Naval engineering; Pressure distribution; Ship design; Slamming; Slamming loads; two-way coupling
• ISSN: 1744-5302; 1754-212X
• DOI: 10.1080/17445302.2022.2116231

In rough seas, ships may be subject to wave-induced slamming loads. Thus, modelling of fluid and structural mechanics, and their dynamic interactions can help with the evaluation of fluid actions and the prediction of wave-induced loads for use in ship design. In this paper a partitioned two-way coupled CFD-FEA fluid-structure interaction (FSI) method is used to study the water entry of flat plates with different impact velocities and wedges with different deadrise angles. Results show that when flexible plate dynamics prevail, at relatively low to medium impact velocity a negative correlation between the nondimensional pressure and water entry velocities is evident near plate centre areas. A steady correlation exists when only stiff plate dynamics prevail. Pressure differences between stiff and flexible wedges become evident at small deadrise angles. The similarity of the pressure distribution during water impingement of ideally stiff wedge structures is not valid when structural flexibility prevails.