Analysis Of A Rotatable Wind Turbine Tower By Means Of Aero Servo Elastic Load Simulations
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Analysis Of A Rotatable Wind Turbine Tower By Means Of Aero Servo Elastic Load Simulations
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Author : Struve, Achim
language : en
Publisher: KIT Scientific Publishing
Release Date : 2021-04-12
Analysis Of A Rotatable Wind Turbine Tower By Means Of Aero Servo Elastic Load Simulations written by Struve, Achim and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-04-12 with Technology & Engineering categories.
This work highlights how the costs and CO2-emissions of land-based wind turbines can be reduced by means of an innovative and material efficient support structure concept. Thereby the yaw system is placed at the tower base, allowing the whole wind turbine tower to be rotated. The potential of a rotatable inclined lattice tower concept was analysed by means of aero-servo-elastic load simulations in the FAST environment. A balance between different cost aspects revealed significant savings.
Analysis Of A Rotatable Wind Turbine Tower By Means Of Aero Servo Elastic Load Aimulations
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Author : Achim Struve
language : en
Publisher:
Release Date : 2020*
Analysis Of A Rotatable Wind Turbine Tower By Means Of Aero Servo Elastic Load Aimulations written by Achim Struve and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020* with categories.
Load Direction Derived Support Structures For Wind Turbines A Lattice Tower Concept And Preparations For Future Certifications Preprint
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Author :
language : en
Publisher:
Release Date : 2017
Load Direction Derived Support Structures For Wind Turbines A Lattice Tower Concept And Preparations For Future Certifications 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 2017 with categories.
The call for more cost-effective and environmentally friendly tower concepts is motivated by tower costs [1] and tower CO2-emission contributions [2], which are high relative to the whole wind turbine system. The proposed rotatable tower concept with yaw bearing at the bottom instead of the top of the tower will provide beneficial economic and environmental impacts to the turbine system. This wind alignment capability indicates a load-direction-derived tower design. By combining this approach with a lattice concept, large material and cost savings for the tower can be achieved. This paper presents a way to analyze and verify the proposed design through aero-servo-elastic simulations, which make future certifications of rotatable tower concepts viable. For this reason, the state-of-the-art, open-source lattice-tower finite-element-method (FEM) module SubDyn [10], developed by the National Renewable Energy Laboratory, has been modified to account for arbitrary member cross-sections. Required changes in the beam element stiffness and mass matrix formulation took place according to an energy method [13]. All validated adaptions will be usable within the aero-servo-elastic simulation framework FAST and are also beneficial for other nonrotatable lattice structures.
Design Of Cast Steel Components Under Cyclic Loading
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Author : Nagel, Sven
language : en
Publisher: KIT Scientific Publishing
Release Date : 2022-05-27
Design Of Cast Steel Components Under Cyclic Loading written by Nagel, Sven and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-05-27 with Technology & Engineering categories.
This work presents a design approach that links fatigue resistance of cast steel component to permissible defect sizes. It is based on fractures mechanics, is in line with experiences of the last 60 years and validated by extensive experimental as well as numerical investigations on different scales and under consideration of real casting defects. By following established assessment methods, the design concept is adapted to practical building applications.
Finite Element Simulation Of Residual Stresses From Welding And High Frequency Hammer Peening
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Author : Gkatzogiannis, Stefanos
language : en
Publisher: KIT Scientific Publishing
Release Date : 2022-06-30
Finite Element Simulation Of Residual Stresses From Welding And High Frequency Hammer Peening written by Gkatzogiannis, Stefanos and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-06-30 with Technology & Engineering categories.
Research goal of the present monograph is the establishment of an efficient engineering approach, which will include straightforward but accurate simulation models, in order to estimate the residual stress fields of welded joints introduced during welding and their post-weld treatment with High Frequency Hammer Peening. The present subject lies on the intersection of structural engineering, material science and computational mechanics.
Reliability Based Optimization Of Floating Wind Turbine Support Structures
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Author : Mareike Leimeister
language : en
Publisher: Springer Nature
Release Date : 2023-01-01
Reliability Based Optimization Of Floating Wind Turbine Support Structures written by Mareike Leimeister and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-01-01 with Technology & Engineering categories.
This book pursues the ambitious goal of combining floating wind turbine design optimization and reliability assessment, which has in fact not been done before. The topic is organized into a series of very ambitious objectives, which start with an initial state-of-the-art review, followed by the development of high-fidelity frameworks for a disruptive way to design next generation floating offshore wind turbine (FOWT) support structures. The development of a verified aero-hydro-servo-elastic coupled numerical model of dynamics for FOWTs and a holistic framework for automated simulation and optimization of FOWT systems, which is later used for the coupling of design optimization with reliability assessment of FOWT systems in a computationally and time-efficient manner, has been an aim of many groups internationally towards implementing a performance-based/goal-setting approach in the design of complex engineering systems. The outcomes of this work quantify the benefits of an optimal design with a lower mass while fulfilling design constraints. Illustrating that comprehensive design methods can be combined with reliability analysis and optimization algorithms towards an integrated reliability-based design optimization (RBDO) can benefit not only the offshore wind energy industry but also other applications such as, among others, civil infrastructure, aerospace, and automotive engineering.
Fully Vs Sequentially Coupled Loads Analysis Of Offshore Wind Turbines
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Author :
language : en
Publisher:
Release Date : 2017
Fully Vs Sequentially Coupled Loads Analysis Of Offshore Wind Turbines written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
The design and analysis methods for offshore wind turbines must consider the aerodynamic and hydrodynamic loads and response of the entire system (turbine, tower, substructure, and foundation) coupled to the turbine control system dynamics. Whereas a fully coupled (turbine and support structure) modeling approach is more rigorous, intellectual property concerns can preclude this approach. In fact, turbine control system algorithms and turbine properties are strictly guarded and often not shared. In many cases, a partially coupled analysis using separate tools and an exchange of reduced sets of data via sequential coupling may be necessary. In the sequentially coupled approach, the turbine and substructure designers will independently determine and exchange an abridged model of their respective subsystems to be used in their partners' dynamic simulations. Although the ability to achieve design optimization is sacrificed to some degree with a sequentially coupled analysis method, the central question here is whether this approach can deliver the required safety and how the differences in the results from the fully coupled method could affect the design. This work summarizes the scope and preliminary results of a study conducted for the Bureau of Safety and Environmental Enforcement aimed at quantifying differences between these approaches through aero-hydro-servo-elastic simulations of two offshore wind turbines on a monopile and jacket substructure.
Maritime Engineering And Technology
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Author : Carlos Guedes Soares
language : en
Publisher: CRC Press
Release Date : 2012-11-26
Maritime Engineering And Technology 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 2012-11-26 with Technology & Engineering categories.
Maritime Engineering and Technology includes the papers from the 1st International Conference on Maritime Technology and Engineering (MARTECH 2011, Lisbon, Portugal, 10-12 May 2011). MARTECH 2011 was held to commemorate 100 years of the Instituto Superior Tico (IST) in Lisbon, and the contributions in the present volume reflect the
Wind Turbine Aerodynamics And Vorticity Based Methods
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Author : Emmanuel Branlard
language : en
Publisher: Springer
Release Date : 2017-04-05
Wind Turbine Aerodynamics And Vorticity Based Methods written by Emmanuel Branlard and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-04-05 with Technology & Engineering categories.
The book introduces the fundamentals of fluid-mechanics, momentum theories, vortex theories and vortex methods necessary for the study of rotors aerodynamics and wind-turbines aerodynamics in particular. Rotor theories are presented in a great level of details at the beginning of the book. These theories include: the blade element theory, the Kutta-Joukowski theory, the momentum theory and the blade element momentum method. A part of the book is dedicated to the description and implementation of vortex methods. The remaining of the book focuses on the study of wind turbine aerodynamics using vortex-theory analyses or vortex-methods. Examples of vortex-theory applications are: optimal rotor design, tip-loss corrections, yaw-models and dynamic inflow models. Historical derivations and recent extensions of the models are presented. The cylindrical vortex model is another example of a simple analytical vortex model presented in this book. This model leads to the development of different BEM models and it is also used to provide the analytical velocity field upstream of a turbine or a wind farm under aligned or yawed conditions. Different applications of numerical vortex methods are presented. Numerical methods are used for instance to investigate the influence of a wind turbine on the incoming turbulence. Sheared inflows and aero-elastic simulations are investigated using vortex methods for the first time. Many analytical flows are derived in details: vortex rings, vortex cylinders, Hill's vortex, vortex blobs etc. They are used throughout the book to devise simple rotor models or to validate the implementation of numerical methods. Several Matlab programs are provided to ease some of the most complex implementations.
Handbook Of Wind Energy Aerodynamics
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Author : Bernhard Stoevesandt
language : en
Publisher: Springer Nature
Release Date : 2022-08-04
Handbook Of Wind Energy Aerodynamics written by Bernhard Stoevesandt and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-08-04 with Technology & Engineering categories.
This handbook provides both a comprehensive overview and deep insights on the state-of-the-art methods used in wind turbine aerodynamics, as well as their advantages and limits. The focus of this work is specifically on wind turbines, where the aerodynamics are different from that of other fields due to the turbulent wind fields they face and the resultant differences in structural requirements. It gives a complete picture of research in the field, taking into account the different approaches which are applied. This book would be useful to professionals, academics, researchers and students working in the field.