Fsi Analysis of Submarine Outfall

Gücüyen, Engın; Erdem, R. Tuğrul; Gökkuş, Ümit

doi:10.21278/brod67205

Cited by 4 publications

(4 citation statements)

References 17 publications

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“…The differential equation governing the response of a multi degree-of-freedom system is expressed by Eq. (15).…”

Section: Semi Analytical Studymentioning

confidence: 99%

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Analyses of damaged effects on jacket type offshore platform

2023

JCE

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In this paper, an offshore platform subjected to dynamic loading for different damage cases was modelled via fluid-structure interaction (FSI) analysis. Different damage models were considered in the case where one leg was broken, and the Young’s modulus of the damaged member was reduced with four different severity ratios. In addition to the five damaged structures, the undamaged structure was modelled according to two different leg spacing conditions. Thus, the damaged models were compared among themselves as well as with undamaged models. In this study, models were investigated using a numerical FSI technique. The numerical technique was verified using semi-analytical modelling. At this stage, the equation of motion of one of the structural models was solved using a semi-analytical method based on a multi-degree-of-freedom system. In addition, the numerical environment model was verified using a semi-analytical solution of the free-surface motion equation and the wave velocity-wave force curve. An Abaqus finite-element analysis program was used to model the structures and their surroundings. While the structures were modelled using the Lagrangian technique, the fluid surroundings were modelled using the Eulerian technique. Both the conditions of leg spacing and different severity ratios were modelled, and the most negative damage type was revealed.

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“…The differential equation governing the response of a multi degree-of-freedom system is expressed by Eq. (15).…”

Section: Semi Analytical Studymentioning

confidence: 99%

“…Finite element analysis was applied to both analyses. An FSI analysis supported by finite elements can be performed using either the Eulerian technique [13,14] or the Lagrangian technique [15]. In addition, both techniques can be used in arbitrary Lagrangian-Eulerian (ALE) [16,17] and coupled Eulerian-Lagrangian (CEL) [18] analyses.…”

Section: Introductionmentioning

confidence: 99%

Analyses of damaged effects on jacket type offshore platform

2023

JCE

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“…Finite element analysis is applied for both analyses. Finite element-supported FSI analysis can be accomplished using either the Eulerian technique [23] or the Lagrangian technique [24]. Nevertheless, both techniques can also be used in arbitrary Lagrangian-Eulerian (ALE) [25,26] and coupled Eulerian-Lagrangian (CEL) [27] analyses.…”

Section: Introductionmentioning

confidence: 99%

Numerical modelling of floating structure with coupled Eulerian–Lagrangian technique

Lakušić¹

2022

JCE

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Floating structures are complex systems composed of superstructure, floating-mooring components, and anchors. In this study, the behaviours of a pontoon, which is used as a floating structure, and four mooring elements under different wave loading conditions were investigated. A numerical analysis of the coupled motions of the pontoon, mooring lines, and marine environment was performed. While the mooring lines were modelled as wire elements, the pontoon was modelled as a rigid body with six degrees of freedom. Wave loading conditions were represented using two different wave spectra. The first spectrum (Case I) was generated based on a single sinusoidal wave utilising the JONSWAP spectrum, whereas the second one (Case II) was generated based a superimposed multi-sinusoidal wave. Time-varying motions of the pontoon and tensions of the mooring lines were determined based on the numerical analyses for Cases I and II. Critical values were determined using the results of both cases. The numerical solutions were based on bidirectional fluid–structure interaction (FSI) analysis. A fully non-linear free surface simulation was performed using the coupled Eulerian–Lagrangian (CEL) technique. Furthermore, numerical results were compared with the results obtained from analytical solutions of free surface elevations.

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“…CFD modeling has been a major interest of researchers in engineering field. 6,7 Li et al 8 investigated water and sediment two-phase flow in the channel of emitter with CFD. Our research optimized the structure of labyrinth channel and significantly reduced emitter clogging using external factors.…”

Section: Introductionmentioning

confidence: 99%

The mechanism of emitter clogging analyzed by CFD–DEM simulation and PTV experiment

Long

et al. 2018

Advances in Mechanical Engineering

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Small but complicated labyrinth channel emitters are easily clogged. In this study, computational fluid dynamics-discrete element method coupling approach was employed to investigate the mechanism of emitter clogging caused by particles in size of 65, 100, and 150 mm. Computational fluid dynamics used Navier-Stokes equation to analyze flow characteristics of continuous phase. Discrete element method used Newton's laws of motion to measure single particle motion and group distribution of disperse phase. Particle tracking velocimetry was also utilized to follow the trajectories and velocity of single particle. Our results indicated that the smaller the particle size, the less the total force. Tiny sands were mainly influenced by drag forces. The amplitude between tooth tips was small. Particles moved basically in the main stream with fast velocity and short travel distance, thereby having good following performance. It took shorter time to reach microdynamic balance. Meanwhile, the amount of sediments in the labyrinth channel was less. Particles in size of 150 mm were mainly affected by inertial forces. They can easily enter vortex areas. Sands staying longer than 0.1 s in the labyrinth channel accounted for 37.9% of total number. Sand groups were mainly distributed at the inlet of labyrinth channel. The more sands trapped in vortex areas, the easier it was to precipitate and cause emitter clogging.

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Fsi Analysis of Submarine Outfall

Cited by 4 publications

References 17 publications

Analyses of damaged effects on jacket type offshore platform

Analyses of damaged effects on jacket type offshore platform

Numerical modelling of floating structure with coupled Eulerian–Lagrangian technique

The mechanism of emitter clogging analyzed by CFD–DEM simulation and PTV experiment

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