Large Scale Wave Impacts on a Vertical Wall

Hofland, Bas; Kaminski, M.L.; Wolters, Guido

doi:10.9753/icce.v32.structures.15

Cited by 36 publications

(40 citation statements)

References 16 publications

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“…To test the impact of waves on different coastal defense structures and materials, Deltares operates the Delta Flume facility, which is one of the largest wave flume facilities in the world (Figure 1). Currently a new Delta Flume (length = 230 m, width = 5 m, height = 9.5 m) is constructed in Delft (Hofland et al 2012). The flume is crucial for the Netherlands to model coastal structures and to assess their safety against major wave attack, storm surges and flooding.…”

Section: Introductionmentioning

confidence: 99%

Laser Ranging For Monitoring Water Waves In The New Deltares Delta Flume

Streicher

Hofland

Lindenbergh

2013

ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.

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ABSTRACT:Currently a new wave flume for hydraulic experiments near to prototype scale is under construction at Deltares. In the flume, modern measurement equipment will be installed. One of the potential sensor techniques is Terrestrial Laser Scanner (TLS) based range measurements of water waves. TLS range measurements are a very fast and accurate method for solid surfaces, providing temporal and spatial high resolution profile measurements. The conditions under which measurements of water surfaces with TLS are possible are however less well understood. The main objective of this work is to explore possibilities to apply TLS based range measurements of water waves in the new Delta Flume facility. Hence, influencing parameters on TLS based range measurements from water waves in the laboratory are identified from literature. The influencing parameters are further investigated in a test featuring the SICK LMS 511 and measuring the water surface in the 50 m TU Delft wave flume. Analysis of the results provides an insight into the possibilities and potential problems of the new measurement method. The obtained profile measurements from a originally straight still water surface showed a tendency to bend upwards at the side of the profile. For that reason a surface correction method based on the refraction of the laser beam when entering the water is elaborated. This method is part of the derived wave field reconstruction method. Finally, an optimized water wave measurement set-up for the new Delta Flume proposed.

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Section: Introductionmentioning

confidence: 99%

Laser Ranging For Monitoring Water Waves In The New Deltares Delta Flume

Streicher

Hofland

Lindenbergh

2013

ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.

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“…Selon la position du point de déferlement, les impacts sont classifiés comme (HOFLAND et al 2011) : -"slosh impact" proche du cas du ballotement, où l'onde devrait produire une vague déferlante en aval du mur. -"air pocket impact" ou impact à poche d'air, qui correspond au cas où l'onde déferle sur le mur, créant une poche d'aire entre l'eau et la paroi.…”

Section: èMes Journées Nationales Génie Côtier -Génie Civil Dunkunclassified

Modélisation par la méthode SPH de l'impact de la houle sur une paroi verticale

Lu¹,

Cherfils²,

Pinon³

et al. 2014

XIIIèmes JNGCGC, Dunkerque

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Résumé :Un outil numérique, de type SPH (Smoothed Particle Hydrodynamics), a été développé dans le but de simuler l'interaction hydrodynamique entre la houle et des ouvrages portuaires ou côtiers, dotés de systèmes de récupération d'énergie marine. Nous nous intéressons plus particulièrement à la prédiction des pics de pression survenant lors de l'impact de vagues sur un ouvrage, afin de calculer les efforts auxquels la structure sera soumise. L'impact d'un soliton sur un mur vertical, adossé à une plage inclinée, a donc été simulé dans un canal à houle numérique, montrant ainsi la capacité du code à traiter ce type de problème. En faisant varier les paramètres d'entrée du batteur, nous avons retrouvé les différentes formes d'impacts mis en évidence par les expériences : aerated impact, flip through, air pocket et slosh impact. Afin d'étudier le lien entre la forme de l'interface et la dynamique de l'impact, un cas académique de "jet triangulaire" a été étudié de manière similaire à l'étude de . Plusieurs variantes de la méthode SPH (Rusanov-SPH, Delta-SPH, …) ont été testées en termes de stabilité et précision. Cela a conduit à une nette amélioration du calcul de la pression sur la paroi et de la trajectoire du jet tout en préservant le caractère lagrangien de la méthode. D'autres variantes de la méthode SPH, basées sur les schémas type ALE (Arbitraire Lagrange Euler) et les solveurs de Riemann permettent d'obtenir de bons résultats (GUILCHER et al., 2010, RAFIEE et al., 2013, moyennant des temps de calculs supérieurs. Les résultats obtenus ici sont comparés avec ceux d'une autre méthode numérique, de type VOF, ainsi qu'avec un modèle analytique.

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“…The experimental data of model and prototype tests on the interaction of coastal structures and waves show that high-magnitude impact (shock) pressures are formed when waves break directly on seawalls which are vertical faced. [1][2][3][4][5][6][7][8][9][10][11][12] From the past investigations, [13][14][15] the spatial distribution of impact pressures on the wave-structure interface has become quite well known. There are various dynamic analysis on the spatial and temporal distribution of wave loading on structures using some numerical models; [16][17][18][19][20][21] however, especially in engineering practice, it is more convenient to follow a method which is based on static analyses.…”

Section: Introductionmentioning

confidence: 99%

Dynamic magnification response of a vertical plate exposed to breaking wave impact

Tanrikulu

2018

Advances in Mechanical Engineering

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The dynamic behavior of coastal structures under wave impact closely depends on the temporal and spatial variations of the impact load. The dynamic analyses and design of a coastal structure succeeds if the design load history for the wave impact is available. Since these types of data are very difficult to find, it is more proper to use a method based on static analysis. For this purpose, the ratio of the maximum value of the dynamic response to that found by static analysis is presented as a factor of multiplication and is called ''dynamic magnification factor.'' The dynamic magnification factors from waves breaking directly on vertical coastal plates with built-in edges are calculated for different thicknesses and aspect ratios. The governing equation of the problem is solved by finite element method in which a mesh dependency study is carried out for each plate to find the most appropriate mesh density. From the present computational results, it is suggested that the bending moments from the static analysis of plates can be modified by a factor of 1.15 to obtain the equivalent dynamic bending moments for the plate dimensions in the range of 0.8 a/b 3 and the wave condition considered in the study.

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Large Scale Wave Impacts on a Vertical Wall

Cited by 36 publications

References 16 publications

Laser Ranging For Monitoring Water Waves In The New Deltares Delta Flume

Laser Ranging For Monitoring Water Waves In The New Deltares Delta Flume

Modélisation par la méthode SPH de l'impact de la houle sur une paroi verticale

Dynamic magnification response of a vertical plate exposed to breaking wave impact

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