Numerical and experimental study of hydrodynamic impact and elastic response of one free-drop wedge with stiffened panels

Luo, Hanbing; Wang, Hui; Soares, C. Guedes

doi:10.1016/j.oceaneng.2011.11.004

Cited by 90 publications

(22 citation statements)

References 20 publications

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“…The decoupled problem of elastic wedge entry was studied by Luo et al (2012) both theoretically and experimentally. A finite-element model was employed to compute the stresses in the wedge.…”

Section: Elastic Wedge Impact By Wagner's Approachmentioning

confidence: 99%

Elastic wedge impact onto a liquid surface: Wagner's solution and approximate models

Хабахпашева

Korobkin

2013

Journal of Fluids and Structures

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Section: Elastic Wedge Impact By Wagner's Approachmentioning

confidence: 99%

Elastic wedge impact onto a liquid surface: Wagner's solution and approximate models

Хабахпашева

Korobkin

2013

Journal of Fluids and Structures

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“…While analytical and computational models enable a thorough and systematic analysis of both the kinematics and kinetics of the water flow and their relationship to the spatiotemporal evolution of the slamming load, experimental studies have primarily focused on the wedge motion and the total vertical force on the wedge during impact (Peterson et al, 1997;Faltinsen, 2000;Carcaterra and Ciappi, 2004;Judge et al, 2004;Wu et al, 2004;Tveitnes et al, 2008;Luo et al, 2012;. Only few efforts have documented a direct measurement of the hydrodynamic loading at selected locations on the impacting structure through pressure gauges (Charca et al, 2009;Battley and Allen, 2011;Stenius et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Assessment of PIV-based analysis of water entry problems through synthetic numerical datasets

Facci

Ubertini

Porfiri

2015

Journal of Fluids and Structures

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a b s t r a c tThe phenomenon of hull-slamming, that is, the sudden impact of a solid body on the water surface, is critical in the design of naval structures. Thus, the development and validation of schemes to predict the slamming load and elucidate energy exchange during water entry are of fundamental importance in a wide range of engineering applications. Recent studies have demonstrated the possibility of using direct flow measurements from particle image velocimetry (PIV) to investigate the kinetics of water entry. Specifically, these efforts have contributed a first characterization of the hydrodynamic loading on impacting wedges and of the energy imparted to the water pile-up and the spray jets. Here, we seek to provide a thorough assessment of such a PIV-based approach through synthetic datasets, in which PIV parameters, such as the camera acquisition rate and the size of the interrogation area, are systematically varied, without experimental confounds. We implement a direct computational framework to study the two-dimensional flow physics generated during the water entry of a rigid wedge. Water and air are treated as immiscible phases and their relative motion is utilized to track the free surface dynamics. Our results show that the PIV-based methodology allows for an accurate reconstruction of the pressure field from the measured velocity field, except for early stages of the impact and for a small region close to the free surface. We also demonstrate that the reconstruction is only marginally affected by the spatial resolution, while a sufficiently high acquisition frequency is required to correctly predict the pressure field in the pile-up region. The proposed computational framework can also find application in the analysis of less studied aspects of water entry problems, such as cycling loading, flow transitions and separation, and formation of spray jets.

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“…Meanwhile, the smoothed particle hydrodynamics method (SPH) has also been used to analyze the wedge water entry problem by Farsi and Ghadimi (2013, 2014a, and 2014b. Yamada et al (2012), Luo et al (2012), Mutsuda and Doi (2009) Khabakhpasheva and korobkin (2012), and Mo et al (2011), are among other researchers who have investigated this problem.…”

Section: Introductionmentioning

confidence: 99%

Asymmetric Water Entry of Twin Wedges with Different Deadrises, Heel Angles, and Wedge Separations using Finite Element Based Finite Volume Method and VOF

Shademani

Ghadimi

2017

JAFM

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Asymmetric water entry of twin wedges is investigated for deadrise angles of 30 and 50 degrees, and heel angles of 5, 10, 15, and 20 degrees as well as wedge separation ratios of 1 and 2. Finite Element based Finite Volume method (FEM-FVM) is used in conjunction with Volume of Fluid (VOF) scheme for the targeted analyses. Free surface evolution and impact forces versus time are determined and comparisons of the maximum force of the wedges against each other are presented for all the considered cases. It is demonstrated that the impact force on the second wedge is always greater than the first one by a minimum of 6% and maximum of 146% which is a very significant increase in the impact force and may cause high accelerations and damage to the structure. It is also observed that the mentioned effects increase with decreasing deadrise angle and increasing heel angle.

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Numerical and experimental study of hydrodynamic impact and elastic response of one free-drop wedge with stiffened panels

Cited by 90 publications

References 20 publications

Elastic wedge impact onto a liquid surface: Wagner's solution and approximate models

Elastic wedge impact onto a liquid surface: Wagner's solution and approximate models

Assessment of PIV-based analysis of water entry problems through synthetic numerical datasets

Asymmetric Water Entry of Twin Wedges with Different Deadrises, Heel Angles, and Wedge Separations using Finite Element Based Finite Volume Method and VOF

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