Design and analysis of buoy geometries for a wave energy converter

Beirão, Pedro; Malça, Cândida

doi:10.1007/s40095-014-0091-7

Cited by 25 publications

(15 citation statements)

References 12 publications

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“…For spherical body towing, the rotations can be ignored, the hydrodynamic forces are obtained using the Morison equation, and the hydrostatic forces can be computed theoretically. An example of approximately spherical body towing systems are the used in operations of installation of buoys or more sophisticated devices as wave energy converters [13]. For this reason, in this work, spherical body towing systems are studied as a particular example.…”

Section: Towing Boundary Conditionmentioning

confidence: 99%

Simulation of Marine Towing Cable Dynamics Using a Finite Elements Method

Luis

Armesto

Guanche

et al. 2020

JMSE

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A numerical model to study the towing maneuver for floating and submerged bodies has been developed. The proposed model is based on the dynamic study of a catenary line moving between two bodies, one body with imposed motion, and the other free to move. The model improves previous models used to study the behavior of mooring systems based on a finite element method by reducing the noise of the numerical results considering the Rayleigh springs model for the tension of the line. The code was successfully validated using experimental results for experimental data from different authors and experiments found in the literature. Sensitivity analysis on the internal damping coefficient and the number of elements has been included in the present work, showing the importance of the internal damping coefficient. As an example of the application of the developed tool, simulations of towing systems on a real scale were analyzed for different setups. The variation of the loads at the towed body and the position of the body were analyzed for the studied configurations. The reasonable results allow us to say that the proposed model is a useful tool with several applications to towing system design, study or optimization.

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Section: Towing Boundary Conditionmentioning

confidence: 99%

Simulation of Marine Towing Cable Dynamics Using a Finite Elements Method

Luis

Armesto

Guanche

et al. 2020

JMSE

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“…However, most CALM buoys are cylindrical and easier to model in wave tanks due to size scaling, advances in mathematical modelling on the moorings cum hoses [66][67][68][69][70][71][72][73][74][75][76], and the motion behaviour compared to other floating structures [77][78][79][80][81][82][83]. Other design advances in other related models exist that are non-mathematical but address various problems for these MOS [84][85][86][87][88][89][90][91][92][93][94]. Nonetheless, open sea tests pose a challenge of having minimal control, which could result in some abnormal recordings due to harsh environmental conditions during field trials.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Modelling of Bonded Marine Hoses for Single Point Mooring (SPM) Systems, with Catenary Anchor Leg Mooring (CALM) Buoy Application—A Review

Amaechi

Wang

2021

JMSE

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The application of mathematical analysis has been an essential tool applied on Catenary Anchor Leg Mooring (CALM) buoys, Wave Energy Converters (WEC), point absorber buoys, and various single point mooring (SPM) systems. This enables having mathematical models for bonded marine hoses on SPM systems with application with CALM buoys, which are obviously a requisite for the techno-economic design and operation of these floating structures. Hose models (HM) and mooring models (MM) are utilized on a variety of applications such as SPARs, Semisubmersibles, WECs and CALM buoys. CALM buoys are an application of SPM systems. The goal of this review is to address the subject of marine hoses from mathematical modeling and operational views. To correctly reproduce the behavior of bonded marine hoses, including nonlinear dynamics, and to study their performance, accurate mathematical models are required. The paper gives an overview of the statics and dynamics of offshore/marine hoses. The reviews on marine hose behavior are conducted based on theoretical, numerical, and experimental investigations. The review also covers challenges encountered in hose installation, connection, and hang-off operations. State-of-the-art, developments and recent innovations in mooring applications for SURP (subsea umbilicals, risers, and pipelines) are presented. Finally, this study details the relevant materials that are utilized in hoses and mooring implementations. Some conclusions and recommendations are presented based on this review.

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“…La interacción fluido-estructura o Interaction Fluid Structure ha presentado un desafío para la ingeniería, existen diversas aplicaciones que abordan la interacción de fluidos, en las cuales se presentan soluciones para su transporte (Costarelli, Garelli, Cruchaga, Storti & D'Elía, 2015;Cruchaga, Reinoso, Storti & Celentano, 2013;Ausensi, 2014) así como para la captación de energía (Beirão & dos Santos, 2014).…”

Section: Introductionunclassified

Estudio del comportamiento dinámico de una boya sumergida con superficie libre bajo condiciones de vibración forzada

2019

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En el presente trabajo se estudia experimentalmente la interacción fluido-estructura de una boya sumergida con superficie libre en aceite vegetal. El montaje realizado consiste en una esfera de madera sumergida dentro de un tanque de sección cuadrada, sometido a diferentes condiciones de oscilación y cuyos movimientos son generados mediante una mesa vibratoria. El objetivo principal del trabajo es determinar el comportamiento dinámico de la esfera sumergida, para lo cual se utiliza la captura de imagen a través de una cámara de alta velocidad, con la cual se obtiene la posición de un objeto en cada fotograma. Además, se realiza el estudio de la evolución de la superficie libre con y sin objeto, en donde se varían valores de amplitud y frecuencia impuesta, para una única altura de llenado. Para una amplitud impuesta de 0.2 cm no hubo dificultades en cuanto al registro mediante sensores ultrasónicos, sin embargo, a medida que aumenta el valor de la amplitud se registran alturas de ola con altas pendientes y movimientos tridimensionales, lo cual dificultó su estudio. Posteriormente se realiza el estudio del efecto de la boya en la superficie libre, en donde se observa que a mayor amplitud y frecuencia de movimiento impuesto la amplitud de ola es mayor con presencia de la esfera. Por último, en la caracterización dinámica del sistema se registran movimientos planos en la mayoría de casos.

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Design and analysis of buoy geometries for a wave energy converter

Cited by 25 publications

References 12 publications

Simulation of Marine Towing Cable Dynamics Using a Finite Elements Method

Simulation of Marine Towing Cable Dynamics Using a Finite Elements Method

Mathematical Modelling of Bonded Marine Hoses for Single Point Mooring (SPM) Systems, with Catenary Anchor Leg Mooring (CALM) Buoy Application—A Review

Estudio del comportamiento dinámico de una boya sumergida con superficie libre bajo condiciones de vibración forzada

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