Parametric Modellig and Fatigue Damage Assessment of Offshore Wind Turbine Support Structures

Offshore wind turbines suffer a number of environmental loads which damage their support structure and decrease their lifetime. These forces are produced by the wind, waves and currents and they damage the monopile cyclically. This project aims to quantify that damage through simulating a parametric FEA (finite element analysis) and by applying Palmgren-Miner’s rule. For so, a model has been built in ANSYS Workbench and validated through a modal analysis. Then, the behaviour of a monopile in the Southern North Sea has been simulated: wind speed and wave height data were processed into applicable loads. From the results, the cumulative damage was calculated and lifetime defined. Finally, some parameters were altered to evaluate their influence on the fatigue damage. The parametric modelling and fatigue damage assessment showed, on the one hand, that cathodic protection for monopiles is indispensable and, on the other hand, that the use of larger (thicker, longer and bigger diameter) monopiles improves the lifetime of the structure as damage is reduced

The Maunakea Spectroscopic Explorer Book 2018

(Abridged) This is the Maunakea Spectroscopic Explorer 2018 book. It is intended as a concise reference guide to all aspects of the scientific and technical design of MSE, for the international astronomy and engineering communities, and related agencies. The current version is a status report of MSE's science goals and their practical implementation, following the System Conceptual Design Review, held in January 2018. MSE is a planned 10-m class, wide-field, optical and near-infrared facility, designed to enable transformative science, while filling a critical missing gap in the emerging international network of large-scale astronomical facilities. MSE is completely dedicated to multi-object spectroscopy of samples of between thousands and millions of astrophysical objects. It will lead the world in this arena, due to its unique design capabilities: it will boast a large (11.25 m) aperture and wide (1.52 sq. degree) field of view; it will have the capabilities to observe at a wide range of spectral resolutions, from R2500 to R40,000, with massive multiplexing (4332 spectra per exposure, with all spectral resolutions available at all times), and an on-target observing efficiency of more than 80%. MSE will unveil the composition and dynamics of the faint Universe and is designed to excel at precision studies of faint astrophysical phenomena. It will also provide critical follow-up for multi-wavelength imaging surveys, such as those of the Large Synoptic Survey Telescope, Gaia, Euclid, the Wide Field Infrared Survey Telescope, the Square Kilometre Array, and the Next Generation Very Large Array.Comment: 5 chapters, 160 pages, 107 figure

Parametric Modellig and Fatigue Damage Assessment of Offshore Wind Turbine Support Structures

Offshore wind turbines suffer a number of environmental loads which damage their support structure and decrease their lifetime. These forces are produced by the wind, waves and currents and they damage the monopile cyclically. This project aims to quantify that damage through simulating a parametric FEA (finite element analysis) and by applying Palmgren-Miner’s rule. For so, a model has been built in ANSYS Workbench and validated through a modal analysis. Then, the behaviour of a monopile in the Southern North Sea has been simulated: wind speed and wave height data were processed into applicable loads. From the results, the cumulative damage was calculated and lifetime defined. Finally, some parameters were altered to evaluate their influence on the fatigue damage. The parametric modelling and fatigue damage assessment showed, on the one hand, that cathodic protection for monopiles is indispensable and, on the other hand, that the use of larger (thicker, longer and bigger diameter) monopiles improves the lifetime of the structure as damage is reduced

Simulación del robot Delta mediante MATLAB

[ES]El presente Trabajo Fin de Grado: SIMULACIÓN DEL ROBOT DELTA MEDIANTE MATLAB trata sobre el robot Delta. El objetivo principal del trabajo es servir de base para futuros proyectos. Incluye información sobre los robots Delta, así como de sus aplicaciones. Este tipo de robots tienen numerosas aplicaciones y beneficios gracias a las numerosas características favorables que se mencionan a lo largo del trabajo, como lo es por ejemplo la gran velocidad a la que se puede mover. En el trabajo se verán las resoluciones de los problemas cinemáticos: directo e inverso. Además, se podrán describir trayectorias tomando como base los anteriores problemas cinemáticos. Finalmente, es especialmente interesante la introducción de los interpoladores en la generación de trayectorias y los beneficios que ello trae consigo.[EU]SIMULACIÓN DEL ROBOT DELTA MEDIANTE MATLAB Gradu Amaierako Lana Delta errobota eta bere erabileraz aritzen da. Lan honen helburu nagusia etorkizuneko proiektuetarako oinarri izatea da. Bere barnean, Delta errobotei eta euren aplikazio ugariei buruzko informazioa aurkitzen da. Errobot mota honen aplikazio anitz ditu lanan zehar aipatuko diren ezaugarri onuragarriei esker; hala nola, abiadura handian mugitzeko gaitasuna. Hurrengo orrialdetan, problema zinematiko zuzena eta alderantzizko problema zinematikoen ebazpena ageri da. Gainera, problema hauetan oinarrituz hainbat ibilbide sortu ahal izando dira. Azkenik, aipagarria da interpolatzaileen sarrera ibilbide sorkuntza eta euren eragin onuragarria.[EN]The essay: SIMULACIÓN DEL ROBOT DELTA MEDIANTE MATLAB is about the Delta robot. Its main purpouse is to serve as the base of future projects. The essay includes information about Delta robots and about their applications. This kind of robots has a wide variety of applications and benefits thanks to all the favourable characteristics that are mentioned along the document, as the increased speed that these robots can reach. Forward and inverse kinematics problems will also be solved in this paper.Moreover, with the help of the mentioned kinematics, different trajectories can also be described. Finally, it is of sume interest the benefits that the introduction of the interpolators brings for the generation of trajectories

The Maunakea Spectroscopic Explorer Book 2018

(Abridged) This is the Maunakea Spectroscopic Explorer 2018 book. It is intended as a concise reference guide to all aspects of the scientific and technical design of MSE, for the international astronomy and engineering communities, and related agencies. The current version is a status report of MSE's science goals and their practical implementation, following the System Conceptual Design Review, held in January 2018. MSE is a planned 10-m class, wide-field, optical and near-infrared facility, designed to enable transformative science, while filling a critical missing gap in the emerging international network of large-scale astronomical facilities. MSE is completely dedicated to multi-object spectroscopy of samples of between thousands and millions of astrophysical objects. It will lead the world in this arena, due to its unique design capabilities: it will boast a large (11.25 m) aperture and wide (1.52 sq. degree) field of view; it will have the capabilities to observe at a wide range of spectral resolutions, from R2500 to R40,000, with massive multiplexing (4332 spectra per exposure, with all spectral resolutions available at all times), and an on-target observing efficiency of more than 80%. MSE will unveil the composition and dynamics of the faint Universe and is designed to excel at precision studies of faint astrophysical phenomena. It will also provide critical follow-up for multi-wavelength imaging surveys, such as those of the Large Synoptic Survey Telescope, Gaia, Euclid, the Wide Field Infrared Survey Telescope, the Square Kilometre Array, and the Next Generation Very Large Array