Abstract
Experimental or numerical analysis of the response of ships and other floating structures starts with correct environmental modelling. The capabilities of numerical tools are rapidly expanding, but presently the evaluation of extreme events in waves (such as slamming, green water, air-gap exceedance) still requires a combination of experiments and different levels of numerical tools. The present paper describes recent efforts within the Maritime Research Institute Netherlands (MARIN) to improve experimental and numerical wave modelling and especially their combination. The ultimate objective is to be able to reproduce any wave condition from a basin or from sea in numerical tools and vice versa, including a sound treatment of basin effects, numerical effects and statistical variability. The aspects that are of importance in both types of wave modelling are first introduced, after which a number of examples of recent projects is discussed. It can be concluded that important steps were made towards linking experimental and numerical wave modelling, but there are some challenges common to all wave reproductions. Some future planned studies focussing on how to deal with them are discussed as well.
Highlights
Environmental conditions form the starting point for analyses of the behaviour of ships and offshore structures
In order to compare the kinematics from the Computational Fluid Dynamics (CFD) simulations with the Particle Image Velocimetry (PIV) measurements, the focusing and the subsequent breaking events first need to be reproduced in the CFD domain
Important steps were made in recent years, to link experimental and numerical wave modelling
Summary
Environmental conditions form the starting point for analyses of the behaviour of ships and offshore structures. In the future, it could be efficient to carry out a large part of the analysis numerically in fast ’screening tools’ to identify wave events that are potentially critical for wave impacts and generate these isolated events in more advanced tools such as CFD or in a model test basin Such an approach was evaluated for structures at zero speed [12,13].
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