Slamming loads and responses on a non-prismatic stiffened aluminium wedge: part I. experimental study
Slamming loads and responses on a non-prismatic stiffened aluminium wedge: part I. experimental study
Hydroelastic slamming is a phenomenon that occurs when there is a fully coupled interaction between the water surface and a deformable structure, and it has a significant effect on the local and global loads of the structure during high impact velocities in rough seas. Estimating the simultaneous structural responses caused by hydrodynamic loads during high impact water entry is a challenging task. This article, which is Part I of a two-part companion paper, deals with the experimental studies of the impact-induced loads and structural responses of a three-dimensional non-prismatic aluminium wedge with stiffened panel during free-fall water entry. Two different plates were considered on the bottom of the wedge in order to study the influence of flexural rigidity on hydroelastic slamming. A description of the experimental conditions, including the geometry of the wedge, material properties, and the test plan is provided. The effects of water impact velocity, deadrise angle, mass of the wedge, and bending stiffness on the slamming pressures and structural responses are discussed in detail. It is shown that the maximum strain and deformation occur during the partially wetted phase of the slamming problem. The study concludes that the hydroelasticity effects on slamming responses generally increase at lower deadrise angles and higher impact velocities. The importance of FSI simulation is assessed using a hydroelasticity factor (RF), which is found to have a significant effect on the unstiffened bottom for all impact velocities studied. For a stiffened bottom panel, hydroelasticity is only significant at high impact velocities.
Dynamic response, Experimental study, Flexible fluid structure interactions (FFSI), Free-fall water entry, Slamming loads
Hosseinzadeh, Saeed
47ee65b8-f6a8-4c4f-b99c-146eb389464b
Tabri, Kristjan
356c5b68-8f06-4c67-8b75-14216758c1c8
Hirdaris, Spyros
917f2db7-b47a-4d3b-a493-942a7ef51fa5
Sahk, Tarmo
934e6f4a-2775-4484-b4bc-056ff50b3542
24 April 2023
Hosseinzadeh, Saeed
47ee65b8-f6a8-4c4f-b99c-146eb389464b
Tabri, Kristjan
356c5b68-8f06-4c67-8b75-14216758c1c8
Hirdaris, Spyros
917f2db7-b47a-4d3b-a493-942a7ef51fa5
Sahk, Tarmo
934e6f4a-2775-4484-b4bc-056ff50b3542
Hosseinzadeh, Saeed, Tabri, Kristjan, Hirdaris, Spyros and Sahk, Tarmo
(2023)
Slamming loads and responses on a non-prismatic stiffened aluminium wedge: part I. experimental study.
Ocean Engineering, 279, [114510].
(doi:10.1016/j.oceaneng.2023.114510).
Abstract
Hydroelastic slamming is a phenomenon that occurs when there is a fully coupled interaction between the water surface and a deformable structure, and it has a significant effect on the local and global loads of the structure during high impact velocities in rough seas. Estimating the simultaneous structural responses caused by hydrodynamic loads during high impact water entry is a challenging task. This article, which is Part I of a two-part companion paper, deals with the experimental studies of the impact-induced loads and structural responses of a three-dimensional non-prismatic aluminium wedge with stiffened panel during free-fall water entry. Two different plates were considered on the bottom of the wedge in order to study the influence of flexural rigidity on hydroelastic slamming. A description of the experimental conditions, including the geometry of the wedge, material properties, and the test plan is provided. The effects of water impact velocity, deadrise angle, mass of the wedge, and bending stiffness on the slamming pressures and structural responses are discussed in detail. It is shown that the maximum strain and deformation occur during the partially wetted phase of the slamming problem. The study concludes that the hydroelasticity effects on slamming responses generally increase at lower deadrise angles and higher impact velocities. The importance of FSI simulation is assessed using a hydroelasticity factor (RF), which is found to have a significant effect on the unstiffened bottom for all impact velocities studied. For a stiffened bottom panel, hydroelasticity is only significant at high impact velocities.
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More information
Accepted/In Press date: 7 April 2023
e-pub ahead of print date: 24 April 2023
Published date: 24 April 2023
Additional Information:
Funding Information:
This research work has been financially supported by the Estonian Research Council via the grants PRG83 (Numerical simulation of the FSI for the dynamic loads and response of ships) and PRG1820 (Dynamic response of offshore structures). The authors would also like to thank the staff of the Marine Technology Competence Center at Tallinn University of Technology (TALTECH MARTE) for their valuable support of the experimental study.
Keywords:
Dynamic response, Experimental study, Flexible fluid structure interactions (FFSI), Free-fall water entry, Slamming loads
Identifiers
Local EPrints ID: 486130
URI: http://eprints.soton.ac.uk/id/eprint/486130
ISSN: 0029-8018
PURE UUID: 96f72c64-f5ee-4b08-863c-bd48abc5d029
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Date deposited: 10 Jan 2024 17:39
Last modified: 18 Mar 2024 04:16
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Author:
Saeed Hosseinzadeh
Author:
Kristjan Tabri
Author:
Spyros Hirdaris
Author:
Tarmo Sahk
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