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Effects of Panel Stiffness on Slamming Responses of Composite Hull Panels
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Naval Systems. (KTH Centre for Naval Architecture)
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Naval Systems. (KTH Centre for Naval Architecture)ORCID iD: 0000-0001-7542-3225
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2009 (English)In: 17th International Conference on Composite Materials, ICCM17, 2009, 1-11 p.Conference paper, Published paper (Refereed)
Abstract [en]

Controlled water slam testing of composite hull panels was conducted to study the effect of hydroelasticity for three panels with different stiffnesses. The experimental methodology successfully characterised the hydroelastic behaviour, which included kinematic as well as inertial effects. Hydroelastic effects included changes in panel geometry, local velocity, fluid pressures, and panel structural responses.

Place, publisher, year, edition, pages
2009. 1-11 p.
Keyword [en]
Dynamic, Experiments, Hydroelasticity, Marine, Panel, Sandwich, Slamming
National Category
Vehicle Engineering
Identifiers
URN: urn:nbn:se:kth:diva-10992Scopus ID: 2-s2.0-80052045247OAI: oai:DiVA.org:kth-10992DiVA: diva2:233772
Conference
17th International Conference on Composite Materials, ICCM-17; Edinburgh; United Kingdom; 27 July 2009 through 31 July 2009
Note

QC 20100810

Available from: 2009-09-02 Created: 2009-09-02 Last updated: 2014-09-26Bibliographically approved
In thesis
1. Hydroelasticity in Marine Hull Bottom Panels - Modeling and Characterization
Open this publication in new window or tab >>Hydroelasticity in Marine Hull Bottom Panels - Modeling and Characterization
2009 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The work in this thesis is concerned with the localized problem of hydroelasticity in marine panel-water impacts with an overall aim to increase the efficiency of high-speed craft by application of more refined methods in the structural design. The work mainly focuses on numerical modeling of the hydroelastic problem and therewith related aspects in the modeling and characterization of hydroelasticity. In addition, the work also addresses aspects regarding design methods of high-speed craft and experimental analysis of hydroelasticity.

Two-dimensional panel-water impacts are simulated by using the commercial finite element code LS-DYNA. For the modeling of the panel-water impact situations a generalized approach for determination of fluid discretization and contact parameters is derived and extensively used throughout this work. The hydroelastic problem is studied through systematic series of numerical simulations regarding different impact situations. The work advances the understanding of the hydroelastic problem and introduces concepts such as kinematic and inertia related hydroelastic effects. The work further presents hydroelastic effects in contrast to previously published results, in the sense that it may not be conservative to ignore hydroelasticity in the structural design. This increase in the structural response when accounting for hydroelasticity can partly be related to kinematic effects, and partly to inertia related added mass effects. The results further show that, the effects of hydroelasticity increase with increased impact velocity, increased panel width, decreased deadrise angle, decreased panel flexural and in-plane stiffness, and decreased rotational and in-plane fixation at the boundaries.

A tentative method is derived to characterize the hydroelastic problem, which, despite its simplicity and limitations, is found to successfully capture the complexity of the hydroelastic interaction in the design of the experimental setup. The experimental water slam testing of composite hull panels are conducted to study the effect of hydroelasticity for panels with different stiffnesses. The observed hydroelastic effects included changes in panel geometry, local velocity and hydrodynamic pressures. These effects also correlate with the observed hydroelastic effects from the numerical simulations.

 

Place, publisher, year, edition, pages
Stockholm: KTH, 2009. xi, 20 p.
Series
Trita-AVE, ISSN 1651-7660 ; 2009:42
Keyword
fluid-structure interaction, hydroelasticity, hull-water impact, high-speed craft, slamming, explicit finite element methods
National Category
Vehicle Engineering
Identifiers
urn:nbn:se:kth:diva-10903 (URN)978-91-7415-389-7 (ISBN)
Public defence
2009-09-16, F3, Lindstedtsvägen 26, KTH, Stockholm, 10:15 (English)
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Supervisors
Note
QC 20100810Available from: 2009-09-02 Created: 2009-08-12 Last updated: 2010-08-10Bibliographically approved

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Stenius, IvanRosén, Anders

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