Computation of tow loads on a liferaft in a surface wave

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Conference8th Canadian Marine Hydromechanics and Structures Conference, 16-17 October, 2007, St. John's, NL
SubjectLiferaft; fast rescue craft; towing; coupled dynamics
AbstractA numerical model for the coupled dynamics of a small liferaft and fast rescue craft in a surface wave is presented. The equations are formulated in 2D using the methods of Kane and Levinson (1985) and solved numerically using a MATLAB® Runge-Kutta routine. It is assumed that the motion normal to the wave surface is small and can be neglected, i.e. the bodies move along the propagating wave profile. The bodies are small so that wave diffraction and reflection are negligible. A Stokes? second order wave is used and the wave forces are applied using Morison?s equation for a body in accelerated flow.Wind loads are similarly modeled using drag coefficients. Comparison with model tests performed at the Institute for Ocean Technology shows good agreement. The model provides guidelines for predicting the tow loads and motions of small craft in severe sea states.
Publication date
AffiliationNRC Institute for Ocean Technology; National Research Council Canada
Peer reviewedNo
NRC number6522
NPARC number8895878
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Record identifier82370d12-4843-4fdb-aa37-744e7a2fa755
Record created2009-04-22
Record modified2016-05-09
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