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Publications
Schellin, T. E., Beiersdorf, C., Chen, X.-B., Fonseca, Schellin, T.E., Beiersdorf, C., Chen, X.-B., Fonseca, N., Guedes Soares, C., Loureiro, A.M., Papanikolau, A.D., de Lucas, A.P. and Ponce Gomez, J.M. (2003), “Numerical and Experimental Investigation to Evaluate Wave Induced Design Loads for Fast Ships”, Proceedings of the Transactions of SNAME Annual Meeting, Vol. 111, pp. 431-461
Results of the European research project WAVELOADS are presented. The objective of the research work was to meet the need of practical and sufficiently accurate theoretical/numerical methods to predict wave-induced global load effects for modern high speed ships. To answer this need, two alternative numerical techniques were used to predict wave-induced design loads. One technique, based on the linear three-dimensional radiation/diffraction Green function formulation, included the development of a software module that relies on the so-called Fourier-Kochin free-surface forward-speed Green function method. This module was implemented in two existing linear frequency domain panel codes to adequately account for the high forward speed effects that influence wave-induced load predictions. The other technique, a nonlinear time domain strip theory method, accounted for the most dominant nonlinearities associated with the vertical responses, namely, hydrostatics and Froude-Krilov forces caused by large hull motions, green water on deck effects, and viscous effects. To validate these techniques and to specify their limits of application, a high speed ferry, a fast monohull, and a containership serving as reference ships were systematically model tested. Difficulties associated with performing these seakeeping tests were considerable and required the development of special instrumentation. A finite element analysis of the high speed ferry’s hull structure was subjected to wave-induced design loads. Computed midship design vertical bending moments and the resulting stress flows were compared to classification society rule values.
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