Review of water entry with applications to aerospace structures

Seddon, Caroline M.; Moatamedi, Mojtaba

doi:10.1016/j.ijimpeng.2004.09.002

Cited by 192 publications

(69 citation statements)

References 32 publications

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“…However, besides the inherent costs of experimental campaigns, the results obtained from scaled models are affected by inaccuracies related to the scaling of the hydrodynamics phenomena. In the past years, it became clear that the use of numerical simulations, which aim to support the design and the verification process, is also crucial in order to reduce the costs of experimental tests [24].…”

Section: Introductionmentioning

confidence: 99%

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Modelling strategies for numerical simulation of aircraft ditching

Bisagni

Pigazzini

2017

International Journal of Crashworthiness

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Ditching, which is a controlled landing of an airplane on water, is an emergency condition to be investigated in order to improve the aircraft global crashworthiness. The complex hydrodynamic phenomena involved in ditching events are difficult to simulate and the accuracy of the results depends on the capability to reproduce the forces related to the interaction of the fuselage with the water surface. In the first part of the paper, the vertical impact on water of a rigid sphere is analysed using the explicit solver LS-DYNA in order to compare different modelling strategies. Four models of the fluid domain are presented: Lagrangian, arbitrary Lagrangian-Eulerian, smoothed particle hydrodynamics and hybrid Lagrangian-smoothed particle hydrodynamics. In the second part, the ditching of a scaled simplified airplane is simulated considering two different models for the water region. Experimental data from the literature are used to validate the simulations. The analysis, where the water and the air are modelled with the arbitrary Lagrangian-Eulerian method, shows a better correlation with the experimental data because this formulation can reproduce the suction force which acts on the fuselage and affects significantly the ditching dynamics.

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Section: Introductionmentioning

confidence: 99%

“…While vertical impacts have been extensively analysed both numerically and experimentally [1,2,14,24], there are still difficulties related to the numerical simulation of ditching events [6,11,13,27,29]. This is essentially related to two main factors.…”

Section: Introductionmentioning

confidence: 99%

Modelling strategies for numerical simulation of aircraft ditching

Bisagni

Pigazzini

2017

International Journal of Crashworthiness

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“…Water entry of aerospace structures is similar to slamming in terms of fluid-structure interaction, which has been summarized by Seddon and Moatamedi [2006].…”

Section: Introductionmentioning

confidence: 99%

On Slamming Pressure of Flat Elastic Plates with Different Aspect Ratios

Yan

Sun

2016

Coastal Engineering Journal

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Flat plate slamming problem involves complicated interactions between the solid or deformable structure with the air-water flow. In order to investigate this problem, we carried out a series of dropping tests using flat elastic plates with different aspect ratios in a water tank while measuring pressure on the plates and observe the flow field. Both the longitudinal edges of each plate are kept close to the tank walls and so deflection of the plate and associated flow may be considered as two-dimensional (2D). Time histories of the pressure and its maximum values are reported in this paper. Based on the experimental results, the maximum values and durations of the pressure measured at the center of the plates are compared with empirical formulae in literatures.

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“…Although the first analytical solution with the added mass concept was proposed in 1929 (1) , this nonlinear problem is still attracting great attention (2) . There have been many studies on this problem; some employed numerical simulation (3)(4)(5)(6) , others analyzed images taken by high-speed cameras were analyzed (7) .…”

Section: Introductionmentioning

confidence: 99%

Impact Force Measurement of a Spherical Body Dropping onto a Water Surface from Different Heights

Araki¹,

Takita²,

Ishima³

et al. 2014

Proceedings of the 2nd International Conference on Intelligent Systems and Image Processing 2014

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The impact force of spherical body dropping onto a water surface is measured using the method which has been proposed by us. In the method, a cube corner prism is embedded in a metal spherical body. The optical center of the cube corner prism coincides with The center of gravity of the spherical body. The motion of the spherical body is measured in the optical interferometer. The velocity of the spherical body can be calculated from the Doppler frequency measured in the interferometer. The acceleration, displacement, and inertial force of the spherical body can be calculated from the velocity of the spherical body. The dropping distance of the spherical body is variable. In this experiment, the distance is set to approximately 60 mm, 150 mm, and 190 mm, so that the difference of impact force caused by the difference of initial velocity is evaluated in detail.

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Review of water entry with applications to aerospace structures

Cited by 192 publications

References 32 publications

Modelling strategies for numerical simulation of aircraft ditching

Modelling strategies for numerical simulation of aircraft ditching

On Slamming Pressure of Flat Elastic Plates with Different Aspect Ratios

Impact Force Measurement of a Spherical Body Dropping onto a Water Surface from Different Heights

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