Publicações

Schellin, T.E., Beiersdorf, C., Chen, X.-B., Fonseca, N., Guedes Soares, C., Loureiro, A.M., Papanikolau, A.D., de Lucas, A.P. e 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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