Whipping response analysis by one way fluid structure interaction—A case study

Dhavalikar, Sharad; Awasare, Sachin; Joga, Ramkumar; Kar, A.R.

doi:10.1016/j.oceaneng.2015.04.048

Cited by 13 publications

(5 citation statements)

References 6 publications

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“…The authors used two code samples for simulation flow and structure, one using the finite volume method for the flow side and the other using the finite element method for the solid side. The one-way fluid-structure interaction method was employed for the simulation effect of waves on a ship's hull by Dhavalikar et al [3]. It was assumed that the ship's hull was a rigid body and wave loads were then simulated on a rigid body.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Fluid–Structure Interaction Case Study on Elastic Beam

Malazi

Eren

et al. 2020

JMSE

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A three-dimensional T-shaped flexible beam deformation was investigated using model experiments and numerical simulations. In the experiment, a beam was placed in a recirculating water channel with a steady uniform flow in the inlet. A high-speed camera system (HSC) was utilized to record the T-shaped flexible beam deformation in the cross-flow direction. In addition, a two-way fluid-structure interaction (FSI) numerical method was employed to simulate the deformation of the T-shaped flexible beam. A system coupling was used for conjoining the fluid and solid domain. The dynamic mesh method was used for recreating the mesh. After the validation of the three-dimensional numerical T-shaped flexible solid beam with the HSC results, deformation and stress were calculated for different Reynolds numbers. This study exhibited that the deformation of the T-shaped flexible beam increases by nearly 90% when the velocity is changed from 0.25 to 0.35 m/s, whereas deformation of the T-shaped flexible beam decreases by nearly 63% when the velocity is varied from 0.25 to 0.15 m/s.

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Section: Introductionmentioning

confidence: 99%

Three-Dimensional Fluid–Structure Interaction Case Study on Elastic Beam

Malazi

Eren

et al. 2020

JMSE

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“…The one-way coupling approach to predict hydroelastic response requires much lesser computational time providing a faster and more economic approach when compared to a two-way coupling. For example, whipping response of a ship in waves revealed reasonable agreement with measurements, however, the wave responses were higher and the local pressure variation at the bow was not captured (Dhavalikar et al 2015). The lack of structural deformations not fed back to the fluid is causing the differences.…”

Section: Introductionmentioning

confidence: 77%

Application of CFD and FEA coupling to predict dynamic behaviour of a flexible barge in regular head waves

Lakshmynarayanana

Temarel

2019

Marine Structures

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The ever increasing size of ships and offshore platforms has resulted in 'softer' hull which require hydroelastic effects to be taken into account when predicting fluid-structure interactions. The majority of such investigations are carried out numerically using potential flow solvers. Although nonlinear potential flow methods are also used, RANS/CFD (Reynolds-averaged Navier-Stokes equations) can fully take into account of nonlinearities. It is important, therefore, to verify and validate the results from such numerical predictions. This paper aims to investigate the symmetric motions and responses of flexible barge in regular waves by coupling RANS/CFD and Finite Element software. The two-way interaction between a fluid solver, Star-CCM+, and a structural solver, Abaqus, is applied by exchanging pressures and nodal displacements more than once every time step, namely implicit coupling scheme. A combination of overset and mesh morphing approaches and finite volume solution to allow for the motions of a body at the free surface is used. The computational results compared with experimental measurements and 2-D linear hydroelastic predictions show good agreement. The discrepancies between the 2-D and CFD/FEA cosimulation arise due to the strong influence of bow and stern radiated waves and the agreement between them improves when the nonlinearities are not as dominant.

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“…According to whether the structure deformation feedback is taken into account for flow computation, the fluid structure interaction problem is divided into one-way and two-way coupling. Dhavalikar [20] compared the results calculated by one-way coupling with experimental results and found the results are larger than the experimental results, Paik [21] calculated the hydroelasticity of container ships by two methods and found that the results of two-way coupling calculation were closer to the experimental results. These works all indicate the necessity of two-way coupling, i.e., taking the structure deformation into account for hydroelasticity computation.…”

Section: Introductionmentioning

confidence: 95%

“…According to whether the structure deformation feedback is taken into account for flow computation, the fluid structure interaction problem is divided into one-way and two-way coupling. Dhavalikar [20] compared the results calculated by one-way coupling with experimental The abovementioned potential flow-based theories have been widely used for hydroelasticity computations, but the basic assumptions of the theory make it difficult to directly simulate the non-linear factors such as wave breaking or large body motions. On the other hand, the CFD (Computational Fluid Dynamics) technology, which is based on solving RANS (Reynolds-Averaged Navier-Stokes) equation, can easily take all these non-linear factors into account.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Non-Linear Ship Hydroelasticity by CFD-FEM Coupling Method

Sun

Liu

Zou

et al. 2021

JMSE

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With the increase of ship size, the stiffness of the hull structure becomes smaller. This means that the frequency of wave excitation tends to be closer to the natural frequency of the hull vibration, which in turn makes the hydroelastic responses more significant. An accurate assessment of the wave loads and motion responses of hulls is the key to ship design and safety assessment. In this paper, the coupled CFD (Computational Fluid Dynamics)-FEM (Finite Element Method) method is used to investigate the non-linear hydroelasticity effect of a 6750-TEU (Twenty-foot Equivalent Unit) container ship. First, by comparing the heave, pitch, and vertical bending moment at midship section (VBM4) against experimental results reported in the literature, the validity of the numerical method in this paper is illustrated. Secondly, the ship responses under different wave length–ship length ratio, wave frequency-structure natural frequency, wave steepness, and ship speeds are studied. It is found that the wave length–ship length ratio has a more important influence on the hydroelastic response than that from wave frequency-structure natural frequency ratio, and the effect of wave non-linearity will behave differently under different wave length–ship length ratio. The increase of rigid body motion caused by forward speed will not correspondingly increase the non-linearity of the hydroelastic response.

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Whipping response analysis by one way fluid structure interaction—A case study

Cited by 13 publications

References 6 publications

Three-Dimensional Fluid–Structure Interaction Case Study on Elastic Beam

Three-Dimensional Fluid–Structure Interaction Case Study on Elastic Beam

Application of CFD and FEA coupling to predict dynamic behaviour of a flexible barge in regular head waves

Investigation of Non-Linear Ship Hydroelasticity by CFD-FEM Coupling Method

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