Quasi-static mooring solver implemented in SPH

Barreiro, A.; Crespo, A. J. C.; Domínguez, José Manuel; García-Feal, Orlando; Unzalu, Igone Zabala; Gómez‐Gesteira, M.

doi:10.1007/s40722-016-0061-7

Cited by 22 publications

(5 citation statements)

References 35 publications

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“…Wave load on Spar-type floating platform is calculated using potential flow theory. Subsequently, quasi-static mooring system model [25] is used to compute mooring line tensions. Finally, dynamic response of Spar-type wind turbine can be solved by regarding the wind turbine as a rigid body.…”

Section: Methodsmentioning

confidence: 99%

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Proposal of a Novel Mooring System Using Three-Bifurcated Mooring Lines for Spar-Type Off-Shore Wind Turbines

et al. 2021

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Floating wind turbine vibration controlling becomes more and more important with the increase in wind turbine size. Thus, a novel three-bifurcated mooring system is proposed for Spar-type floating wind turbines. Compared with the original mooring system using three mooring lines, three-bifurcated sub-mooring-lines are added into the novel mooring system. Specifically, each three-bifurcated sub-mooring-line is first connected to a Spar-type platform using three fairleads, then it is connected to the anchor using the main mooring line. Six fairleads are involved in the proposed mooring system, theoretically resulting in larger overturning and torsional stiffness. For further improvement, a clump mass is attached onto the main mooring lines of the proposed mooring system. The wind turbine surge, pitch, and yaw movements under regular and irregular waves are calculated to quantitatively examine the mooring system performances. A recommended configuration for the proposed mooring system is presented: the three-bifurcated sub-mooring-line and main mooring line lengths should be (0.0166, 0.0111, 0.0166) and 0.9723 times the total mooring line length in the traditional mooring system. The proposed mooring system can at most reduce the wind turbine surge movement 37.15% and 54.5% when under regular and irregular waves, respectively, and can at most reduce the yaw movement 30.1% and 40% when under regular and irregular waves, respectively.

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Section: Methodsmentioning

confidence: 99%

“…This study regards mooring lines as catenaries and utilizes a quasi-static solver to solve deformation and tension of mooring lines [25]. The adopted quasi-static solver can counter distributed mass, mooring stress, and mooring elastic.…”

Section: Quasi-static Mooring System Modelmentioning

confidence: 99%

Proposal of a Novel Mooring System Using Three-Bifurcated Mooring Lines for Spar-Type Off-Shore Wind Turbines

et al. 2021

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“…Smoothed Particle Hydrodynamics (SPH) is a mesh-free Lagrangian method that was first developed by Gingold and Monaghan (1977) to study astrophysical phenomena. Since then the SPH method has evolved and diversified from the initial idea to reach the desired degree of maturity required to simulate complex engineering problems (Barreiro et al 2016). Traditionally SPH has been applied for simulations related to computational fluid dynamics (Colagrossi and Landrini 2003), ocean and coastal engineering (Wei and Dalrymple 2016).…”

Section: Methodology Smoothed Particle Hydrodynamicsmentioning

confidence: 99%

On the improvement of computational efficiency of smoothed particle hydrodynamics to simulate flexural failure of ice

Das

Holm

2018

J. Ocean Eng. Mar. Energy

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The Finite Element Method (FEM) has been extensively applied to model failure of ice but suffers from mesh distortion especially when fracture or fragmentation is involved. The Smoothed Particle Hydrodynamics (SPH) method can avoid this class of problems and has been successfully applied to simulate fracture of solids. However, the associated computational cost is increased considerably for SPH simulations. Reducing the computational time without any significant decrease in accuracy is naturally quite critical for SPH to be considered as an efficient numerical tool to simulate failure. Thus, the focus of the present article was to investigate the feasibility of different approaches of domain decomposition, mass scaling, time scaling and coupled SPH-FEM techniques to improve the computational resource requirement. The accuracy, efficiency and limitations of each of these approaches were discussed and the results were compared with analytical solution and four-point beam bending experiments. The results drawn from the comparisons substantiate that domain decomposition, mass scaling and process time scaling can be adequately used for quasi-static cases to reduce the CPU requirements as long as the kinetic energy is constantly monitored to ensure that inertial effects are negligible. Furthermore, as the computational time primarily depends on the number of discrete particles in a simulation, coupled SPH-FEM method was identified as a viable alternative to reduce the simulation time and the results from such coupled simulations seem to agree well with published experimental data. This study showed that the proposed methods were not only able to emulate the failure mechanisms observed during experimental investigations but also reduce the computational resource requirements associated with pure SPH simulations, without any significant reduction in numerical accuracy and stability.

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“…Regarding the mooring dynamics, in fact, several efforts have been dedicated to this topic within the DualSPHysics framework. For instance, inspired by the quasi-static approach proposed by Faltinsen [60], in 2016, Barreiro et al [185] modeled the mooring system via continuous ropes and wires described by the catenary function. This method was also adopted to simulate floating OWCs moored to the seabed by Crespo et al in 2017 [186].…”

Section: Multibody Coupling and Mooring Hydrodynamicsmentioning

confidence: 99%

A Review of SPH Techniques for Hydrodynamic Simulations of Ocean Energy Devices

et al. 2022

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This article is dedicated to providing a detailed review concerning the SPH-based hydrodynamic simulations for ocean energy devices (OEDs). Attention is particularly focused on three topics that are tightly related to the concerning field, covering (1) SPH-based numerical fluid tanks, (2) multi-physics SPH techniques towards simulating OEDs, and finally (3) computational efficiency and capacity. In addition, the striking challenges of the SPH method with respect to simulating OEDs are elaborated, and the future prospects of the SPH method for the concerning topics are also provided.

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Quasi-static mooring solver implemented in SPH

Cited by 22 publications

References 35 publications

Proposal of a Novel Mooring System Using Three-Bifurcated Mooring Lines for Spar-Type Off-Shore Wind Turbines

Proposal of a Novel Mooring System Using Three-Bifurcated Mooring Lines for Spar-Type Off-Shore Wind Turbines

On the improvement of computational efficiency of smoothed particle hydrodynamics to simulate flexural failure of ice

A Review of SPH Techniques for Hydrodynamic Simulations of Ocean Energy Devices

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