The Effect Of Second Order Hydrodynamics On Floating Offshore Wind Turbines
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The Effect of Second-order Hydrodynamics on a Floating Offshore Wind Turbine
Author | : L. Roald |
Publisher | : |
Total Pages | : 140 |
Release | : 2014 |
Genre | : Offshore electric power plants |
ISBN | : |
The design of offshore floating wind turbines uses design codes that can simulate the entire coupled system behavior. At the present, most codes include only first-order hydrodynamics, which induce forces and motions varying with the same frequency as the incident waves. Effects due to second- and higher-order hydrodynamics are often ignored in the offshore industry, because the forces induced typically are smaller than the first-order forces. In this report, first- and second-order hydrodynamic analysis used in the offshore oil and gas industry is applied to two different wind turbine concepts--a spar and a tension leg platform.
Marine Hydrodynamics, 40th anniversary edition
Author | : J. N. Newman |
Publisher | : MIT Press |
Total Pages | : 450 |
Release | : 2018-01-26 |
Genre | : Technology & Engineering |
ISBN | : 0262534827 |
A textbook that offers a unified treatment of the applications of hydrodynamics to marine problems. The applications of hydrodynamics to naval architecture and marine engineering expanded dramatically in the 1960s and 1970s. This classic textbook, originally published in 1977, filled the need for a single volume on the applications of hydrodynamics to marine problems. The book is solidly based on fundamentals, but it also guides the student to an understanding of engineering applications through its consideration of realistic configurations. The book takes a balanced approach between theory and empirics, providing the necessary theoretical background for an intelligent evaluation and application of empirical procedures. It also serves as an introduction to more specialized research methods. It unifies the seemingly diverse problems of marine hydrodynamics by examining them not as separate problems but as related applications of the general field of hydrodynamics. The book evolved from a first-year graduate course in MIT's Department of Ocean Engineering. A knowledge of advanced calculus is assumed. Students will find a previous introductory course in fluid dynamics helpful, but the book presents the necessary fundamentals in a self-contained manner. The 40th anniversary of this pioneering book offers a foreword by John Grue. Contents Model Testing • The Motion of a Viscous Fluid • The Motion of an Ideal Fluid • Lifting Surfaces • Waves and Wave Effects • Hydrodynamics of Slender Bodies
The Effects of Second-order Hydrodynamics on a Semisubmersible Floating Offshore Wind Turbine
Author | : I. Bayati |
Publisher | : |
Total Pages | : 10 |
Release | : 2014 |
Genre | : Hydrodynamics |
ISBN | : |
The objective of this paper is to assess the second-order hydrodynamic effects on a semisubmersible floating offshore wind turbine. Second-order hydrodynamics induce loads and motions at the sum- and difference-frequencies of the incident waves. These effects have often been ignored in offshore wind analysis, under the assumption that they are significantly smaller than first-order effects. The sum- and difference-frequency loads can, however, excite eigenfrequencies of the system, leading to large oscillations that strain the mooring system or vibrations that cause fatigue damage to the structure. Observations of supposed second-order responses in wave-tank tests performed by the DeepCwind consortium at the MARIN offshore basin suggest that these effects might be more important than originally expected. These observations inspired interest in investigating how second-order excitation affects floating offshore wind turbines and whether second-order hydrodynamics should be included in offshore wind simulation tools like FAST in the future. In this work, the effects of second-order hydrodynamics on a floating semisubmersible offshore wind turbine are investigated.
Floating Offshore Wind Energy
Author | : Joao Cruz |
Publisher | : Springer |
Total Pages | : 345 |
Release | : 2016-08-20 |
Genre | : Technology & Engineering |
ISBN | : 3319293982 |
This book provides a state-of-the-art review of floating offshore wind turbines (FOWT). It offers developers a global perspective on floating offshore wind energy conversion technology, documenting the key challenges and practical solutions that this new industry has found to date. Drawing on a wide network of experts, it reviews the conception, early design stages, load & structural analysis and the construction of FOWT. It also presents and discusses data from pioneering projects. Written by experienced professionals from a mix of academia and industry, the content is both practical and visionary. As one of the first titles dedicated to FOWT, it is a must-have for anyone interested in offshore renewable energy conversion technologies.
The Effect of Second-order Hydrodynamics on Floating Offshore Wind Turbines
Author | : Line Roald |
Publisher | : |
Total Pages | : 11 |
Release | : 2013 |
Genre | : Offshore electric power plants |
ISBN | : |
Offshore Wind Energy Technology
Author | : Olimpo Anaya-Lara |
Publisher | : John Wiley & Sons |
Total Pages | : 459 |
Release | : 2018-05-11 |
Genre | : Science |
ISBN | : 1119097789 |
A COMPREHENSIVE REFERENCE TO THE MOST RECENT ADVANCEMENTS IN OFFSHORE WIND TECHNOLOGY Offshore Wind Energy Technology offers a reference based on the research material developed by the acclaimed Norwegian Research Centre for Offshore Wind Technology (NOWITECH) and material developed by the expert authors over the last 20 years. This comprehensive text covers critical topics such as wind energy conversion systems technology, control systems, grid connection and system integration, and novel structures including bottom-fixed and floating. The text also reviews the most current operation and maintenance strategies as well as technologies and design tools for novel offshore wind energy concepts. The text contains a wealth of mathematical derivations, tables, graphs, worked examples, and illustrative case studies. Authoritative and accessible, Offshore Wind Energy Technology: Contains coverage of electricity markets for offshore wind energy and then discusses the challenges posed by the cost and limited opportunities Discusses novel offshore wind turbine structures and floaters Features an analysis of the stochastic dynamics of offshore/marine structures Describes the logistics of planning, designing, building, and connecting an offshore wind farm Written for students and professionals in the field, Offshore Wind Energy Technology is a definitive resource that reviews all facets of offshore wind energy technology and grid connection.
Effects of second-order hydrodynamic forces on floating offshore wind turbines
Author | : A. JNA. Sarmento |
Publisher | : |
Total Pages | : 16 |
Release | : 2014 |
Genre | : Hydrodynamics |
ISBN | : |
Stochastic Dynamics of Marine Structures
Author | : Arvid Naess |
Publisher | : Cambridge University Press |
Total Pages | : 425 |
Release | : 2013 |
Genre | : Mathematics |
ISBN | : 0521881552 |
For students and professionals, this covers theory and methods for stochastic modelling and analysis of marine structures under environmental loads.
Sea Loads on Ships and Offshore Structures
Author | : O. Faltinsen |
Publisher | : Cambridge University Press |
Total Pages | : 344 |
Release | : 1993-09-23 |
Genre | : Business & Economics |
ISBN | : 9780521458702 |
After introducing the theory of the structural loading on ships and offshore structures based on the motions of wind, waves and currents, this text demonstrates its applications to conventional and non-conventional sea vessels, including extensive exercises and examples.