Hydrodynamic loads during water impact of three-dimensional solids: Modelling and experiments

Tassin, Alan; Jacques, Nicolas; Alaoui, Aboulghit El Malki; Nême, Alain; Leblé, Bruno

doi:10.1016/j.jfluidstructs.2011.06.012

Cited by 34 publications

(36 citation statements)

References 34 publications

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“…Wagner's theory and its extension provides analytical or semi-analytical models for both 2D and 3D geometries, and compares well with experiments and fully non-linear numerical simulations for impacting bodies with small deadrise angles, see e.g. (Korobkin and Malenica, 2016;Tassin et al, 2012Tassin et al, , 2010.…”

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confidence: 70%

The influence of aeration and compressibility on slamming loads during cone water entry

Elhimer

Jacques

Alaoui

et al. 2017

Journal of Fluids and Structures

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International audienceThe problem of the impact between a rigid body and a gas-liquid mixture is relevant to various engineering applications, including the design of breakwaters and LNG containers. In the present study, the particular problem of the impact of a rigid cone upon the surface of an aerated liquid is investigated. Numerical simulations of water entry of cones with different deadrise angles (7° and 15°) were performed using an explicit finite element method. The air-water mixture is modelled as a homogeneous fluid with a specific equation of state. In addition, experimental tests of the impact of a cone with a deadrise angle of 7° on the surface of bubbly water were performed. The air volume fraction was measured prior to the impact tests using optical probes, and the instantaneous impact force on the cone was measured using strain gauges. The results highlight a significant reduction of the impact load with the increase of the air volume fraction. Moreover, the numerical results show that this reduction is also dependent on the impact velocity. This phenomenon is found to be related to the nonlinearity of the equation of state of the air-water mixture

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The influence of aeration and compressibility on slamming loads during cone water entry

Elhimer

Jacques

Alaoui

et al. 2017

Journal of Fluids and Structures

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“…It was confirmed that the shape of the free surface, the hydrodynamic pressure and the flow, are all sensitive to the plate vibrations. Tassin et al (2012b) developed a simplified method based on the displacement potential formulation and the BEM for modelling the impact pressure field on 3D bodies of different shapes. Particular attention is devoted to the analysis of the wetted surface and the predicted slamming force is compared with existing results and with a series of impact tests carried out with a hydraulic machine.…”

Section: Slamming and Whippingmentioning

confidence: 99%

Prediction of wave-induced loads on ships: Progress and challenges

et al. 2016

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The aim of this paper is to critically assess the methods used for the evaluation of wave-induced loads on ships examining analytical, numerical and experimental approaches. The paper focuses on conventional ocean going vessels and loads originating from steady state and transient excitations, namely slamming, sloshing and green water, for the latter, and including extreme or rogue waves, as well as the more occasional loads following damage. The advantages and disadvantages of the relatively simpler potential flow approaches against the more time consuming CFD methods are discussed with reference to accuracy, modelling nonlinear effects, ease of modelling and of coupling with structural assessment procedures, suitability for long term response prediction and suitability for integration within design and operational decision making. The paper also assesses the uncertainties involved in predicting wave-induced loads and the probabilistic approaches used for the evaluation of long term response and fatigue analysis. The current design practice is reviewed and the role of numerical prediction methods within the classification framework and goal based design approach discussed. Finally the suitability of current developments in prediction methods to meet the needs of the industry and future challenges is assessed.

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“…For example, Wu analyzed the hydrodynamic impact due to a column of liquid hitting on a solid wall using the complex velocity potential together with the boundary element method. While Tassin et al did a series of impact tests performed with a hydraulic machine to calibrate a numerical method, they developed using the displacement potential formulation and the boundary element method. The choice of LS‐DYNA platform was based on availability and previous use during the WTC‐I studies at Purdue University.…”

Section: Introductionmentioning

confidence: 99%

Response of reinforced concrete beams to high‐velocity fluid impact. Part I: Experiments

Korucu

Irfanoglu

2018

Structural Concrete

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Thirty‐two reinforced concrete beams were tested under static and fluid impact loads. Hoop (rectangular) and spiral transverse reinforcement of various configurations were used to confine the specimens. The objectives were to observe the effect of shape of beams and configuration of confinement reinforcement on the impact resistance, and to estimate the limiting fluid velocity that causes total failure.

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Hydrodynamic loads during water impact of three-dimensional solids: Modelling and experiments

Cited by 34 publications

References 34 publications

The influence of aeration and compressibility on slamming loads during cone water entry

The influence of aeration and compressibility on slamming loads during cone water entry

Prediction of wave-induced loads on ships: Progress and challenges

Response of reinforced concrete beams to high‐velocity fluid impact. Part I: Experiments

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