Hydrodynamic response simulation of Catenary mooring in the spar truss floating platform under Caspian Sea conditions

Samadi, Mohammad Reza; Hassanabad, Madjid Ghodsi

doi:10.1016/j.oceaneng.2017.03.004

Cited by 5 publications

(3 citation statements)

References 4 publications

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“…Then, the responses obtained were compared and verified by numerical models by finite element method. 17 Azcona et al conducted a complete study on dynamics of mooring. They initially provided a simulation code based on centralized mass relationship and then simulated it for different modes.…”

Section: Introductionmentioning

confidence: 99%

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Optimization study of a catenary mooring system for a spar floating wind turbine based on its hydrodynamic responses

Tafazzoli

Shafaghat

Alamian

2020

Proceedings of the Institution of Mechanical Engineers, Part M:

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In this article, selecting an appropriate mooring system for the spar platform of a wind turbine consisting of chain–cable–chain is investigated based on a meta-heuristic method. A boundary element software is applied to hydrodynamics analysis, and the numerical results are verified by experimental results. According to the characteristics of the experimental mooring system, an appropriate chain is selected for the prototype model, and then a mooring system consisting of chain–cable–chain replaces the chain-based mooring system. Environmental forces have been applied by the conditions of the Caspian Sea. Analysis is done in time domain for irregular wave spectrum of Joint North Sea Wave Project. For the cable in the middle, seven lengths in the range of 30–210 m were considered. The simulations showed that in the cable length of 180 m, the structure exhibits a proper behavior. Also, in order to increase the reliability of the anchor, a portion of the initial chain was reduced and was added to the anchor chain; for this purpose, five different chain lengths from 25 to 65 m have been considered. The results show that for the heave, roll, pitch, and yaw degrees of freedom, the minimum structure oscillation happens in the length of 25 m, finally considering the proper behavior of the structure in the length of 25 m; this length of chain was added to the anchor chain.

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Section: Introductionmentioning

confidence: 99%

“…Then, the responses obtained were compared and verified by numerical models by finite element method. 17…”

Section: Introductionmentioning

confidence: 99%

Optimization study of a catenary mooring system for a spar floating wind turbine based on its hydrodynamic responses

Tafazzoli

Shafaghat

Alamian

2020

Proceedings of the Institution of Mechanical Engineers, Part M:

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“…Such phenomenon is called fluid-structure interaction (FSI) effect. There are some publications in the literature devoted to the interaction of fluid and shell by theoretical approaches [5,6]. In the way of potential flow theory, Minami [7] derived the added mass ratio for a rectangular plate under the assumption that the vibration mode is simple harmonic.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Pressure Analysis of Hemispherical Shell Vibrating in Unbounded Compressible Fluid

2018

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This paper is the first to highlight the vibrations of a hemispherical shell structure interacting with both compressible and incompressible fluids. To precisely calculate the pressure of the shell vibrating in the air, a novel analytical approach has been established that has existed in very few publications to date. An analytical formulation that calculates pressure was developed by integrating both the ‘small-density method’ and the ‘Bessel function method’. It was considered that the hemispherical shell vibrates as a simple harmonic function, and the fluid is non-viscous. For comparison, the incompressible fluid model has been analyzed. Surprisingly, it is the first to report that the pressure of the shell surface is proportional to the vibration acceleration, and the velocity amplitude decreased at the rate of 1 r 2 when the fluid was incompressible. Otherwise, the surface pressure of the hemispherical shell was proportional to the vibration velocity, and the velocity amplitude decreased with the rate of 1 r when the fluid was compressible. The compressibility of fluid played an important role in the dynamic pressure of the shell structure. Furthermore, the scale factor derived by the theoretical approach was the product of the density and the sound velocity of the fluid ( ρ o c ) exactly. In this study, the analytical solutions were verified by the calibrated numerical simulations, and the analytical formulation were rigorously tested by extensive parametric studies. These new findings can be used to guide the optimal design of the spherical shell structure subjected to wind load, seismic load, etc.

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Numerical investigation on the multi-body hydrodynamic interactions under Caspian Sea environmental conditions

2021

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Hydrodynamic response simulation of Catenary mooring in the spar truss floating platform under Caspian Sea conditions

Cited by 5 publications

References 4 publications

Optimization study of a catenary mooring system for a spar floating wind turbine based on its hydrodynamic responses

Optimization study of a catenary mooring system for a spar floating wind turbine based on its hydrodynamic responses

Dynamic Pressure Analysis of Hemispherical Shell Vibrating in Unbounded Compressible Fluid

Numerical investigation on the multi-body hydrodynamic interactions under Caspian Sea environmental conditions

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