Experiments and CFD of a high-speed deep-V planing hull – part II: Slamming in waves

Judge, Carolyn Q.; Mousaviraad, Maysam; Stern, Frederick; Lee, Evan; Fullerton, Anne M.; Geiser, Jayson; Schleicher, Christine; Merrill, Craig F.; Weil, Charles; Morin, Jason; Jiang, Minyee; Ikeda, Christine

doi:10.1016/j.apor.2020.102059

Cited by 27 publications

(7 citation statements)

References 9 publications

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“…Future research activities in the towing tank include controlled motion slamming experiments for small craft in waves as well as vertical plane maneuvering of subsurface UUVs. The first set of experiments will be conducted on the GPPH hull form to simulate slamming events similar to those seen in Judge et al, 2,3 and the experimental matrix development for these experiments is outlined in Shepheard. 4 These new experiments will allow for deterministic study of single slamming events that are representative of those expected for the GPPH operating in Sea State IV.…”

Section: Discussionmentioning

confidence: 99%

Virginia tech advanced towing carriage

Gilbert

Javaherian

Woolsey

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part M:

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Virginia Tech has recently acquired a new towing carriage and vertical planar motion mechanism. The new towing carriage replaces the original carriage that was installed in the 1960s. The original carriage had a maximum speed of roughly 3 m/s, and the new carriage has a maximum speed of 7 m/s with the current wavemaker installation. The towing tank facility is used for both teaching and research activities in ocean engineering. The vertical planar motion mechanism includes two linear actuators to change the pitching and heaving behavior of a surface or subsurface test article to model different phenomena such as slamming or porpoising of surface vessels and vertical plane maneuvers for subsurface vessels. The focus of this paper is on the determination of the specifications for the towing tank to meet both teaching and research needs and the early resistance experiments that have been conducted during initial shake-down of the new facility. The authors will discuss how preliminary resistance experiments compare to the USNA towing tank facility.

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Section: Discussionmentioning

confidence: 99%

Virginia tech advanced towing carriage

Gilbert

Javaherian

Woolsey

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part M:

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“…The latter may be more probable for high-speed ships (Judge et al. 2020; Tavakoli et al. 2020), or extreme wave events (Bennett et al.…”

Section: Introductionmentioning

confidence: 99%

“…Traditional methods are based on empirical equations that neglect the hydroelastic response of the structure. The latter may be more probable for high-speed ships (Judge et al 2020;Tavakoli et al 2020), or extreme wave events (Bennett et al 2009;Clauss & Klein 2011;Wang & Guedes Soares 2023). A critical review suggests that steps should be taken to account for the influence of hydroelasticity in the analysis of the water entry problem in a practical fashion that may be useful within the context of ship design (Harding et al 2006;.…”

Section: Introductionmentioning

confidence: 99%

A fluid–solid momentum exchange method for the prediction of hydroelastic responses of flexible water entry problems

2023

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The paper presents a Fluid Structure Interaction (FSI) method for hydroelastic water entry. The method assumes that the momentum exchange between the fluid and solid body can be used for the calculation of pressure, deformation and stresses arising during impact. The flexible fluid–structure interactions of flat plates entering water are solved using a computational code that employs the finite volume method to discretise both fluid and solid equations. This provides a better matching of momentum on the fluid–solid interface. The momentum arising in the solid body that emerges after the impact is defined as the momentum exchange, and is shown to increase linearly under the increase of non-dimensional impact speed. The ratio of the maximum pressure arising in an elastic body entering water to that of a rigid body is termed relative pressure and is shown to decrease linearly as a function of momentum exchange. The latter verifies the main hypothesis of this paper, namely that ‘the pressure acting on an elastic body can be predicted using an unsophisticated equation that uses the momentum exchange.’ The deformation and stresses arising in elastic plates entering water are demonstrated to be functions of momentum exchange and can be found using simple equations formulated via parametrisation of data. It is concluded that subject to further validation, the method could be extended for the prediction of hydroelastic response of other sections/bodies entering water.

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“…Industrial fields have also used CFD software for the analysis of their products. As for the wave dynamics field in the naval architecture, the CFD is often used to simulate an unsteady ship motion (e.g., Waskito et al 2020) and slamming of a ship (e.g., Judge et al 2020). Because the estimations of hydrodynamic forces are important for designing ships, the accurate estimation of these forces is highly demanded in academic and industrial societies.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Numerical Conditions of Moving Particle Semi-implicit for Two-Dimensional Wedge Slamming

Iida

Yokoyama

2021

J. Marine. Sci. Appl.

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The sensitivity of moving particle semi-implicit (MPS) simulations to numerical parameters is investigated in this study. Although the verification and validation (V&V) are important to ensure accurate numerical results, the MPS has poor performance in convergences with a time step size. Therefore, users of the MPS need to tune numerical parameters to fit results into benchmarks. However, such tuning parameters are not always valid for other simulations. We propose a practical numerical condition for the MPS simulation of a two-dimensional wedge slamming problem (i.e., an MPS-slamming condition). The MPS-slamming condition is represented by an MPS-slamming number, which provides the optimum time step size once the MPS-slamming number, slamming velocity, deadrise angle of the wedge, and particle size are decided. The simulation study shows that the MPS results can be characterized by the proposed MPS-slamming condition, and the use of the same MPS-slamming number provides a similar flow.

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Experiments and CFD of a high-speed deep-V planing hull – part II: Slamming in waves

Cited by 27 publications

References 9 publications

Virginia tech advanced towing carriage

Virginia tech advanced towing carriage

A fluid–solid momentum exchange method for the prediction of hydroelastic responses of flexible water entry problems

Investigation of Numerical Conditions of Moving Particle Semi-implicit for Two-Dimensional Wedge Slamming

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