Model Development And Loads Analysis Of A Wind Turbine On A Floating Offshore Tension Leg Platform
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Model Development And Loads Analysis Of A Wind Turbine On A Floating Offshore Tension Leg Platform
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Author :
language : en
Publisher:
Release Date : 2010
Model Development And Loads Analysis Of A Wind Turbine On A Floating Offshore Tension Leg Platform written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Deep-sea moorings categories.
This report presents results of the analysis of a 5-MW wind turbine located on a floating offshore tension leg platform (TLP) that was conducted using the fully coupled time-domain aero-hydro-servo-elastic design code FAST with AeroDyn and HydroDyn. Models in this code are of greater fidelity than most of the models that have been used to analyze floating turbines in the past--which have neglected important hydrodynamic and mooring system effects. The report provides a description of the development process of a TLP model, which is a modified version of a Massachusetts Institute of Technology design derived from a parametric linear frequency-domain optimization process. An extensive loads and stability analysis for ultimate and fatigue loads according to the procedure of the International Electrotechnical Commission offshore wind turbine design standard was performed with the verified TLP model. Response statistics, extreme event tables, fatigue lifetimes, and selected time histories of design-driving extreme events are analyzed and presented. Loads for the wind turbine on the TLP are compared to those of an equivalent land-based turbine in terms of load ratios. Major instabilities for the TLP are identified and described.
Model Development And Loads Analysis Of An Offshore Wind Turbine On A Tension Leg Platform With A Comparison To Other Floating Turbine Concepts
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Author : Denis Matha
language : en
Publisher:
Release Date : 2010
Model Development And Loads Analysis Of An Offshore Wind Turbine On A Tension Leg Platform With A Comparison To Other Floating Turbine Concepts written by Denis Matha and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Deep-sea moorings categories.
This report presents results of the analysis of a 5-MW wind turbine located on a floating offshore tension leg platform (TLP) that was conducted using the fully coupled time-domain aero-hydro-servo-elastic design code FAST with AeroDyn and HydroDyn. The report also provides a description of the development process of the TLP model. The model has been verified via comparisons to frequency-domain calculations. Important differences have been identified between the frequency-domain and time-domain simulations, and have generated implications for the conceptual design process. An extensive loads and stability analysis for ultimate and fatigue loads according to the procedure of the IEC 61400-3 offshore wind turbine design standard was performed with the verified TLP model. This report compares the loads for the wind turbine on the TLP to those of an equivalent land-based turbine. Major instabilities for the TLP are identified and described.
Model Development And Loads Analysis Of An Offshore Wind Turbine On A Tension Leg Platform With A Comparison To Other Floating Turbine Concepts Scholar S Choice Edition
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Author : National Renewable Energy Laboratory (Nr
language : en
Publisher: Scholar's Choice
Release Date : 2015-02-15
Model Development And Loads Analysis Of An Offshore Wind Turbine On A Tension Leg Platform With A Comparison To Other Floating Turbine Concepts Scholar S Choice Edition written by National Renewable Energy Laboratory (Nr and has been published by Scholar's Choice this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-02-15 with categories.
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Model Development And Loads Analysis Of An Offshore Wind Turbine On A Tension Leg Platform With A Comparison To Other Floating Turbine Concepts
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Author : Denis Matha
language : en
Publisher:
Release Date : 2010
Model Development And Loads Analysis Of An Offshore Wind Turbine On A Tension Leg Platform With A Comparison To Other Floating Turbine Concepts written by Denis Matha and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
Model Development And Loads Analysis Of An Offshore Wind Turbine On A Tension Leg Platform With A Comparison To Other Floating Turbine Concepts
DOWNLOAD
Author : Denis Matha
language : en
Publisher:
Release Date : 2010
Model Development And Loads Analysis Of An Offshore Wind Turbine On A Tension Leg Platform With A Comparison To Other Floating Turbine Concepts written by Denis Matha and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Deep-sea moorings categories.
This report presents results of the analysis of a 5-MW wind turbine located on a floating offshore tension leg platform (TLP) that was conducted using the fully coupled time-domain aero-hydro-servo-elastic design code FAST with AeroDyn and HydroDyn. The report also provides a description of the development process of the TLP model. The model has been verified via comparisons to frequency-domain calculations. Important differences have been identified between the frequency-domain and time-domain simulations, and have generated implications for the conceptual design process. An extensive loads and stability analysis for ultimate and fatigue loads according to the procedure of the IEC 61400-3 offshore wind turbine design standard was performed with the verified TLP model. This report compares the loads for the wind turbine on the TLP to those of an equivalent land-based turbine. Major instabilities for the TLP are identified and described.
Comparison Of Second Order Loads On A Tension Leg Platform For Wind Turbines Preprint
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Author :
language : en
Publisher:
Release Date : 2015
Comparison Of Second Order Loads On A Tension Leg Platform For Wind Turbines Preprint written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
The first objective of this work is to compare the two floating offshore wind turbine simulation packages {DIFFRAC+aNySIM} and {WAMIT+FAST}. The focus is on second-order wave loads, and so first- and second-order wave loads are applied to a structure sequentially for a detailed comparison and a more precise analysis of the effects of the second-order loads. aNySIM does not have the capability to model flexible bodies, and so the simulations performed in this tool are done assuming a rigid body. FAST also assumes that the platform is rigid, but can account for the flexibility of the tower. The second objective is to study the effects of the second-order loads on the response of a TLP floating wind turbine. The flexibility of the tower must be considered for this investigation, and therefore only FAST is used.
Upwind Design Limits And Solutions For Very Large Turbines
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Author :
language : en
Publisher: EWEA
Release Date :
Upwind Design Limits And Solutions For Very Large Turbines written by and has been published by EWEA this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
Frequency Domain Modeling And Multidisciplinary Design Optimization Of Floating Offshore Wind Turbines
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Author : Meysam Karimi
language : en
Publisher:
Release Date : 2018
Frequency Domain Modeling And Multidisciplinary Design Optimization Of Floating Offshore Wind Turbines written by Meysam Karimi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
Offshore floating wind turbine technology is growing rapidly and has the potential to become one of the main sources of affordable renewable energy. However, this technology is still immature owing in part to complications from the integrated design of wind turbines and floating platforms, aero-hydro-servo-elastic responses, grid integrations, and offshore wind resource assessments. This research focuses on developing methodologies to investigate the technical and economic feasibility of a wide range of floating offshore wind turbine support structures. To achieve this goal, interdisciplinary interactions among hydrodynamics, aerodynamics, structure and control subject to constraints on stresses/loads, displacements/rotations, and costs need to be considered. Therefore, a multidisciplinary design optimization approach for minimum levelized cost of energy executed using parameterization schemes for floating support structures as well as a frequency domain dynamic model for the entire coupled system. This approach was based on a tractable framework and models (i.e. not too computationally expensive) to explore the design space, but retaining required fidelity/accuracy. In this dissertation, a new frequency domain approach for a coupled wind turbine, floating platform, and mooring system was developed using a unique combination of the validated numerical tools FAST and WAMIT. Irregular wave and turbulent wind loads were incorporated using wave and wind power spectral densities, JONSWAP and Kaimal. The system submodels are coupled to yield a simple frequency domain model of the system with a flexible moored support structure. Although the model framework has the capability of incorporating tower and blade structural DOF, these components were considered as rigid bodies for further simplicity here. A collective blade pitch controller was also defined for the frequency domain dynamic model to increase the platform restoring moments. To validate the proposed framework, predicted wind turbine, floating platform and mooring system responses to the turbulent wind and irregular wave loads were compared with the FAST time domain model. By incorporating the design parameterization scheme and the frequency domain modeling the overall system responses of tension leg platforms, spar buoy platforms, and semisubmersibles to combined turbulent wind and irregular wave loads were determined. To calculate the system costs, a set of cost scaling tools for an offshore wind turbine was used to estimate the levelized cost of energy. Evaluation and comparison of different classes of floating platforms was performed using a Kriging-Bat optimization method to find the minimum levelized cost of energy of a 5 MW NREL offshore wind turbine across standard operational environmental conditions. To show the potential of the method, three baseline platforms including the OC3-Hywind spar buoy, the MIT/NREL TLP, and the OC4-DeepCwind semisubmersible were compared with the results of design optimization. Results for the tension leg and spar buoy case studies showed 5.2% and 3.1% decrease in the levelized cost of energy of the optimal design candidates in comparison to the MIT/NREL TLP and the OC3-Hywind respectively. Optimization results for the semisubmersible case study indicated that the levelized cost of energy decreased by 1.5% for the optimal design in comparison to the OC4-DeepCwind.
Proceedings Of The Indian Geotechnical Conference 2022 Volume 2
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Author : Babu T. Jose
language : en
Publisher: Springer Nature
Release Date :
Proceedings Of The Indian Geotechnical Conference 2022 Volume 2 written by Babu T. Jose and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
Maritime Technology And Engineering 5 Volume 2
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Author : Carlos Guedes Soares
language : en
Publisher: CRC Press
Release Date : 2021-07-08
Maritime Technology And Engineering 5 Volume 2 written by Carlos Guedes Soares and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-07-08 with Technology & Engineering categories.
This set of two volumes comprises the collection of the papers presented at the 5th International Conference on Maritime Technology and Engineering (MARTECH 2020) that was held in Lisbon, Portugal, from 16 to 19 November 2020. The Conference has evolved from the series of biennial national conferences in Portugal, which have become an international event, and which reflect the internationalization of the maritime sector and its activities. MARTECH 2020 is the fifth of this new series of biennial conferences. The set comprises 180 contributions that were reviewed by an International Scientific Committee. Volume 2 is dedicated to ship performance and hydrodynamics, including CFD, maneuvering, seakeeping, moorings and resistance. In addition, it includes sections on ship machinery, renewable energy, fishing and aquaculture, coastal structures, and waves and currents.