Hydroelastic Impacts of Deformable Wedges

Panciroli, Riccardo

doi:10.1007/978-94-007-5329-7_1

Cited by 18 publications

(15 citation statements)

References 55 publications

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“…Finally, the solution of Korobkin and Malenica 24 reads 68 Toyama, 31 and Korobkin and Malenica, 24 respectively, while solid black lines are PIV measurement. The entry depth is from fitted data in Fig.…”

Section: Hydrodynamic Loadingmentioning

confidence: 99%

“…Specifically, we consider: the adaptation of the classical Wagner's (W) solution 30 to asymmetric wedges proposed by Panciroli; 68 Toyama's solution (T); 31 and the solution by Korobkin and Malenica (KM). 24 Wagner's solution yields the following form for the 68 Toyama, 31 and Korobkin and Malenica, 24 respectively, while solid black lines are PIV measurement. The entry depth is from fitted data in Fig.…”

Section: Hydrodynamic Loadingmentioning

confidence: 99%

“…The entry speed is computed from fitted data, and the rate of change of the wetted lengths is identified from PIV data for the first repetition of each condition, by fitting r 1 and r 2 with the Matlab function "polyfitn." We use 68 Toyama, 31 and Korobkin and Malenica, 24 respectively, while solid black lines are PIV measurement. The entry depth is from fitted data in Fig.…”

Section: Hydrodynamic Loadingmentioning

confidence: 99%

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Experiments on the water entry of asymmetric wedges using particle image velocimetry

2015

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In this work, we experimentally characterize the water entry of an asymmetric wedge into a quiescent fluid through particle image velocimetry (PIV). The wedge enters the water surface with an orthogonal velocity falling from a fixed height. We systematically vary the heel angle to elucidate the effect of asymmetric impact on the flow physics and on the fluid-structure interaction. The pressure field in the fluid is reconstructed from PIV data by integrating the Poisson equation. We find that the impact configuration significantly influences both the velocity and the pressure field, ultimately, regulating the hydrodynamic loading on the wedge. Specifically, as the heel angle increases, the location of maximum velocity of the flow moves from the pile-up region to the keel. At the same time, the pressure field significantly decreases in the vicinity of the keel, reaching values smaller than the atmospheric pressure. The spatiotemporal evolution of the hydrodynamic loading is thus controlled by the heel angle, with larger heel angles resulting into more rapid and sustained impacts. C 2015 AIP Publishing LLC. [http://dx.

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Section: Hydrodynamic Loadingmentioning

confidence: 99%

Section: Hydrodynamic Loadingmentioning

confidence: 99%

Section: Hydrodynamic Loadingmentioning

confidence: 99%

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Experiments on the water entry of asymmetric wedges using particle image velocimetry

2015

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“…5.5 shows the initial configuration of the problem. The numerical results are also compared with the experimental data provided in (Panciroli, 2013). Considering that during the period after releasing from height H Ã and before touching the free surface, the flexible bottom will also develop a small amount of deformation.…”

Section: Wedge With Flexible Bottommentioning

confidence: 99%

“…The accelerations of the flexible wedges that are calculated by the coupled Modified MPS and CRMS model are compared with the results from experiment (Panciroli, 2013), rigid-body simulation and Wagner's theory in Fig. 5.6, respectively.…”

Section: Wedge With Flexible Bottommentioning

confidence: 99%

Coupled MPS-modal superposition method for 2D nonlinear fluid-structure interaction problems with free surface

Sun

Djidjeli

Xing

et al. 2016

Journal of Fluids and Structures

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Keywords:Moving particle semi-implicit (MPS) method Fluid structure interaction (FSI) Modal superposition Free surface flow Floating beam Flexible wedge dropping a b s t r a c tIn this paper, a coupled MPS-modal superposition method is developed for 2D nonlinear fluid-structure interaction problems. In this method, the rigid-body and relatively small elastic deformation are coupled together, which considers the mutual effect between them. The elastic deformation of the structure is represented by a mode superposition formulation, which is more efficient compared with FEM, regardless of the size of the structure. For 2D cases, if the first three modes are chosen to represent the flexible deformation of the structure, it only results in a 6 Â 6 matrix equation to be solved. For the fluid motion, the modified Moving Particle Semi-implicit (MPS) method, which significantly reduces the fluctuation of pressure calculation of the original MPS method, is used.Two nonlinear problems, i.e. breaking-water-dam impacting a floating beam and flexible wedge slamming into the water are simulated to demonstrate the performance of the developed method. The numerical simulations show that this coupling model is capable of providing stable results that are generally in good agreement with the available experimental data. For the highly nonlinear case with very large rigid motions, the mutual effect between elastic deformation and rigid motions could accumulate to a relatively remarkable level shown by the curves of trajectories or acceleration history of the body mass centre. This also indicates the importance of mutual effect to analyse highly nonlinear FSI problems with large rigid-body motions and relatively small flexible deformation.

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Dynamic response and failure mechanism characterization of composite‐metal sandwich structures under slamming impact utilizing CEL method

Xie

Wang

et al. 2022

Polymer Composites

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Slamming is a complicated fluid-structure coupling process accompanied with complex transfer of load and energy, which may pose a significant risk to the overall safety of structure. This paper aims to evaluate the dynamic response and elucidate the failure mechanism of composite-metal sandwich structures under slamming impact. Firstly, a reliable numerical simulation process is established based on CEL method in ABAQUS/Explicit combining with a VUMAT subroutine, whose effectiveness is verified through the comparison with published experimental results. Subsequently, dynamic response of the sandwich structures is investigated considering the influence of slamming velocity and material constituent. Meanwhile, damage evolution and critical failure mechanism are assessed through progressive damage analysis. Results show that CF-Al-CF case owns the best mechanical performance and the latest

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Hydroelastic Impacts of Deformable Wedges

Cited by 18 publications

References 55 publications

Experiments on the water entry of asymmetric wedges using particle image velocimetry

Experiments on the water entry of asymmetric wedges using particle image velocimetry

Coupled MPS-modal superposition method for 2D nonlinear fluid-structure interaction problems with free surface

Dynamic response and failure mechanism characterization of composite‐metal sandwich structures under slamming impact utilizing CEL method

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