An experimental study of wave-in-deck loading and its dependence on the properties of the incident waves

Ma, Li; Swan, Chris

doi:10.1016/j.jfluidstructs.2019.102784

Cited by 19 publications

(14 citation statements)

References 18 publications

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“…x o 5 J v t R I X S W I 2 j + / V C S S 4 o p H X R D 2 8 I A R 9 l z h H E j 3 K 2 U d 5 l h 3 B X 0 e 5 O 9 y Z k B H R V n x 7 k W a P u + 7 z o K x x v 5 S y 5 2 a 2 F Q C 0 9 3 y w d b o 7 b m y A b Z J N s k J H v k g B y R E 1 I n n N y T R / J E n r 0 H 7 8 V 7 8 9 6 / o x P e a G a d / I L 3 8 Q U e W 6 h k < / l a t e x i t > velocities (see (vi) below). This can be justified by the fact that F x (t) and the incident wave form are closely related; the evidence for this being provided by a previous laboratory study (Ma & Swan, 2020).…”

Section: The Momentum-dissipation Modulementioning

confidence: 94%

“…Moreover, the starting assumption of a drag-type model, that the problem is defined in the slender-body regime such that the incident flow is undisturbed by the presence of the structure, is difficult to justify for wid loading. Indeed, experimental evidence (Ma & Swan, 2020) showed that the incident fluid velocities are substantially reduced, or brought entirely to rest, as the wave loads the structure. This is particularly relevant to those cases involving impulsive loads, where a very large volume of fluid is brought to rest very quickly.…”

Section: Physical Origin Of the Applied Loadsmentioning

confidence: 99%

“…(2) The broad range of incident wave forms arising in a (realistic) random sea ensures that for any given level of inundation, ∆η, there is a large variation in the magnitude of the applied loads. As a result, the largest wid loads are not necessarily caused by the highest waves and hence the largest ∆η, particularly with the likely occurrence of wave breaking (Ma & Swan, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Specifically, it seeks to devise a versatile and efficient solution that provides a good prediction for the wid loading time-history, F (t), based upon the best-possible estimate for the incident wave profile and the near-crest kinematics. No empirical parameters are included and the widest possible validation is achieved by comparisons to both available laboratory data (Ma & Swan, 2020) and independent cfd predictions (Chen et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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The effective prediction of wave-in-deck loads

Swan

2020

Journal of Fluids and Structures

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The present paper concerns the extreme wave loads acting on an offshore structure; specifically the wave-in-deck loading component that arises when the height of an incident wave crest exceeds the elevation of the topside structure. In this case wave inundation occurs, the resulting loads on the topside structure represent a significant part of the total wave load. A new model for the effective prediction of this important loading component is presented. This is based upon the conservation of momentum, is formulated in a Lagrangian frame of reference, can incorporate any incident wave form, and takes due account of the porosity (or openness) of the topside structure. Comparisons between the model predictions and wide-ranging laboratory observations are shown to be in good agreement; the latter based upon deterministic focused wave events that are known to be representative of the largest waves arising in realistic sea-states. In addition, comparisons are also made with independent cfd calculations. Taken together, the proposed model is shown to accommodate changes in the spectral shape, the spectral peak period, the incident crest elevation (and hence the level of inundation), the directional spread of the incident waves, and the porosity of the topside structure. Importantly, this agreement applies to both non-breaking and breaking waves, involves no empirical calibration, and can be achieved with limited computational resources. As such, the model is ideally suited to design/re-assessment calculations in which the reliability of any offshore structure must be based upon a rigorous assessment of the long-term distribution of the total wave loads, including any wave-in-deck loading component.

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Section: The Momentum-dissipation Modulementioning

confidence: 94%

Section: Physical Origin Of the Applied Loadsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The effective prediction of wave-in-deck loads

Swan

2020

Journal of Fluids and Structures

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“…Validation of wave impact simulations is done by comparing with experiments. The details of impact loads on a structure in waves depend strongly on the details of the incoming waves (as demonstrated by e.g., [39,40]). This makes it necessary to reproduce short wave sequences measured in the model test basin exactly in the CFD model.…”

Section: Aspects Of Numerical Wave Modellingmentioning

confidence: 99%

Linking Experimental and Numerical Wave Modelling

Essen

Scharnke

Bunnik

et al. 2020

JMSE

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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.

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Wave breaking energy dissipation in long-crested focused wave groups based on JONSWAP spectra

Craciunescu

Christou

2020

Applied Ocean Research

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An experimental study of wave-in-deck loading and its dependence on the properties of the incident waves

Cited by 19 publications

References 18 publications

The effective prediction of wave-in-deck loads

The effective prediction of wave-in-deck loads

Linking Experimental and Numerical Wave Modelling

Wave breaking energy dissipation in long-crested focused wave groups based on JONSWAP spectra

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