Two- and three- dimensional hydroelastic analyses of a composite monohull in waves
Two- and three- dimensional hydroelastic analyses of a composite monohull in waves
Both, two and three-dimensional hydroelasticity theories are employed to analyse the dynamic behaviour of a 50 metre composite monohull representing a Single Roll Mine Hunter. The hull material is Glass Reinforced Plastic.
Three different models were created. In the two-dimensional case the vessel was modelled using a Timoshenko beam approach. In the three-dimensional case, two models were created: a Finite Element Beam model and a Finite Element Plate model. In the so-called 'dry analysis' the hull is considered as vibrating 'in vacuo' enabling the necessary dynamic information to be obtained. In the 'wet analysis' different methods were applied. Strip theory is used for the potential flow analysis in the two-dimensional case, whereas in the three-dimensional case, the wetted surface of hull is idealised with panels containing a pulsating source on their centre, allowing the potential flow to be obtained.
Symmetric and antisymmetric modes were considered in the hydroelastic study of this hull, therefore not only head seas but also several wave heading conditions were included in the analyses. Principal coordinates and dynamic loads for regular waves of unit amplitude were calculated, including: vertical, horizontal and torsion moments; shear forces and direct longitudinal stresses at various positions along the hull. Total (steady state + transient) loadings were obtained for time simulations of the monohull in irregular waves. Sea conditions included heavy seas where slamming was studied for several heading angles. Two- and three- dimensional slamming theories were considered to compare the dynamic behaviour of various models in wave.
Remarkable good agreement was achieved between two- and three-dimensional hydroelastic theories, either in the steady state or the slamming loadings. This shows that different methods can be successfully used in the hydroelastic analysis of a monohull.
University of Southampton
Salas Inzunza, Marcos Adolfo
1999
Salas Inzunza, Marcos Adolfo
Salas Inzunza, Marcos Adolfo
(1999)
Two- and three- dimensional hydroelastic analyses of a composite monohull in waves.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
Both, two and three-dimensional hydroelasticity theories are employed to analyse the dynamic behaviour of a 50 metre composite monohull representing a Single Roll Mine Hunter. The hull material is Glass Reinforced Plastic.
Three different models were created. In the two-dimensional case the vessel was modelled using a Timoshenko beam approach. In the three-dimensional case, two models were created: a Finite Element Beam model and a Finite Element Plate model. In the so-called 'dry analysis' the hull is considered as vibrating 'in vacuo' enabling the necessary dynamic information to be obtained. In the 'wet analysis' different methods were applied. Strip theory is used for the potential flow analysis in the two-dimensional case, whereas in the three-dimensional case, the wetted surface of hull is idealised with panels containing a pulsating source on their centre, allowing the potential flow to be obtained.
Symmetric and antisymmetric modes were considered in the hydroelastic study of this hull, therefore not only head seas but also several wave heading conditions were included in the analyses. Principal coordinates and dynamic loads for regular waves of unit amplitude were calculated, including: vertical, horizontal and torsion moments; shear forces and direct longitudinal stresses at various positions along the hull. Total (steady state + transient) loadings were obtained for time simulations of the monohull in irregular waves. Sea conditions included heavy seas where slamming was studied for several heading angles. Two- and three- dimensional slamming theories were considered to compare the dynamic behaviour of various models in wave.
Remarkable good agreement was achieved between two- and three-dimensional hydroelastic theories, either in the steady state or the slamming loadings. This shows that different methods can be successfully used in the hydroelastic analysis of a monohull.
This record has no associated files available for download.
More information
Published date: 1999
Identifiers
Local EPrints ID: 463911
URI: http://eprints.soton.ac.uk/id/eprint/463911
PURE UUID: cdc92799-14f9-466e-ace2-c9a3168f37ec
Catalogue record
Date deposited: 04 Jul 2022 20:58
Last modified: 04 Jul 2022 20:58
Export record
Contributors
Author:
Marcos Adolfo Salas Inzunza
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics