Hydroelastic behaviour and analysis of marine structures

Fuat Kara(Sheffield Hallam University)

Abstract


The numerical predictions of the hydroelasticity of floating bodies with and without forward speed are presented using a direct time domain approximation. Boundary-Integral Equation Method (BIEM) with three-dimensional transient free surface Green function and Neumman-Kelvin approximation is used for the solution of the hydrodynamic part and solved as impulsive velocity potential whilst Euler-Bernoulli beam approach is used for the structural analysis with analytically defined modeshapes. The hydrodynamic and structural parts are then fully coupled through modal analysis for the solution of the hydroelastic problem. A stiff structure is then studied assuming that contributions of rigid body modes are much bigger than elastic modes. A rectangular barge with zero speed and Wigley hull form with forward speed are used for the numerical analyses and the comparisons of the present ITU-WAVE numerical results for response amplitude operator, bending moment, shear force etc. show satisfactory agreement with existing experimental results.

Keywords


hydroelasticity; time domain; transient free-surface wave Green function; boundary integral equation method; Euler-Bernoulli beam; Neumman-Kelvin approximation

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References


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DOI: http://dx.doi.org/10.36956/sms.v2i1.264

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