Hydroelastic analysis of hard-chine sections entering water – observations for use in preliminary design stage
No Thumbnail Available
Access rights
openAccess
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Date
2023-10-01
Major/Subject
Mcode
Degree programme
Language
en
Pages
13
Series
JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING, Volume 145, issue 5
Abstract
Wing-in Ground Effect (WIG) vehicles and planing hulls are exposed to unsteady, high magnitude hydrodynamic forces as their bow enters water. The resulting forces can lead to structural damages and uncomfortable conditions for passengers onboard. This article aims to provide deeper understanding on the influence of structural flexibility throughout the water entry process of a hard chine section. A Finite Volume Method (FVM) based flexible fluid-structure interaction (FFSI) model is used to solve multi-physics. Quantitative comparisons are made between experimental and computational data. Simulations demonstrate that structural responses can attenuate the pressure acting on the body of hard-chine sections impinging water with deadrise angles of 10°, 20° and 30°.However, they cannot affect that of a section with deadrise angle of 45° since its pressure distribution pattern is different. It is shown that the impact speed has an important role in hydroelastic response while the sectional Young’s modulus affects impact pressures and resulting equivalent stresses. The former increases under the increase of Young’s modulus. The latter may increase when the impact speed is low and decreases when the impact speed is high. It is concluded that the results presented may be useful for preliminary design.Description
Keywords
Water entry, Flexible fluid-structure interactions (FFSI), Ship motions, Computational fluid dynamics, Dynamics of structures, Wave mechanics, Wave effects
Other note
Citation
Tavakoli, S, Babanin, A V & Hirdaris, S 2023, ' Hydroelastic analysis of hard-chine sections entering water – observations for use in preliminary design stage ', Journal of Offshore Mechanics and Arctic Engineering, vol. 145, no. 5, 051901 . https://doi.org/10.1115/1.4056162