Hydroelastic analysis of axially loaded Timoshenko beams with intermediate end fixities under hydrodynamic slamming loads

Datta, N.; Siddiqui, Md. Atif

doi:10.1016/j.oceaneng.2016.09.039

Cited by 14 publications

(5 citation statements)

References 14 publications

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“…In some previous studies (e.g. Stenius, Rosén & Kuttenkeuler 2007; Datta & Siddiqui 2016; Feng et al. 2021), different parameters are normalised using the values found for static tests (e.g.…”

Section: Resultsmentioning

confidence: 99%

“…In some previous studies (e.g. Stenius, Rosén & Kuttenkeuler 2007;Datta & Siddiqui 2016;Feng et al 2021), different parameters are normalised using the values found for static tests (e.g. deflection), and impact speed is normalised using the loading period, which can be done only for a wedge section, not a flat plate.…”

Section: Effects Of Momentum Exchange On Hydroelastic Responsementioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 99%

Section: Effects Of Momentum Exchange On Hydroelastic Responsementioning

confidence: 99%

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

2023

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“…e structure is assumed to behave as a slender nonuniform Timoshenko beam accounting for shear deformation and rotary inertia effects (see Figure 2) [50]. Transverse shear is assumed to be constant over the cross section.…”

Section: Structural Dynamic Idealisationmentioning

confidence: 99%

A Fully Coupled Time-Domain BEM-FEM Method for the Prediction of Symmetric Hydroelastic Responses of Ships with Forward Speed

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Hirdaris

Datta

2022

Shock and Vibration

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This paper presents a direct time-domain method for the prediction of symmetric hydroelastic responses of ships progressing with forward speed in small amplitude waves. A transient time-domain free surface Green function is used for the idealisation of the seakeeping problem using an Earth fixed coordinate system. Free surface ship hydrodynamics are idealised in the time domain by a Green function, and forward speed effects are idealised by a space-state model. Modal actions are accounted for by Timoshenko beam structural dynamics. Flexible fluid structure interaction (FFSI) coupling is enabled by a body boundary condition, and a direct integration Newmark- β scheme is used to obtain symmetric dynamic responses. The method is validated against available published numerical and experimental results. A parametric study for different container ship hull forms confirms that (i) forward speed effects should be taken under consideration as far as practically possible and (ii) hull flexibility effects accounting for hull shear deformation and rotary inertia are more notable for slender hull forms.

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“…They established the relationship between the Dynamic Load Factor (DLF) and the wetting time , and identified the range of , within which the plate has significant dynamic response. They further performed theoretical hydroelastic analysis of axially loaded Timoshenko beams with varying end fixities under hydrodynamic slamming loads [30]. Zhu et al [31] numerically studied the dynamic elasto-plastic response of ship plates subjected to moving slamming load.…”

Section: Introductionmentioning

confidence: 99%

Equivalent design pressure for ship plates subjected to moving slamming impact loads

et al. 2020

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Hydroelastic analysis of axially loaded Timoshenko beams with intermediate end fixities under hydrodynamic slamming loads

Cited by 14 publications

References 14 publications

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

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

A Fully Coupled Time-Domain BEM-FEM Method for the Prediction of Symmetric Hydroelastic Responses of Ships with Forward Speed

Equivalent design pressure for ship plates subjected to moving slamming impact loads

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