Computation of Wave Loads under Multidirectional Sea States for Floating Offshore Wind Turbines: Preprint

Computation of Wave Loads under Multidirectional Sea States for Floating Offshore Wind Turbines: Preprint
Author:
Publisher:
Total Pages: 0
Release: 2014
Genre:
ISBN:

This paper focuses on the analysis of a floating wind turbine under multidirectional wave loading. Special attention is given to the different methods used to synthesize the multidirectional sea state. This analysis includes the double-sum and single-sum methods, as well as an equal-energy discretization of the directional spectrum. These three methods are compared in detail, including theergodicity of the solution obtained. From the analysis, the equal-energy method proved to be the most computationally efficient while still retaining the ergodicity of the solution. This method was chosen to be implemented in the numerical code FAST. Preliminary results on the influence of these wave loads on a floating wind turbine showed significant additional roll and sway motion of theplatform.

Offshore Mechanics

Offshore Mechanics
Author: Madjid Karimirad
Publisher: John Wiley & Sons
Total Pages: 305
Release: 2018-05-07
Genre: Technology & Engineering
ISBN: 1119216621

Covers theoretical concepts in offshore mechanics with consideration to new applications, including offshore wind farms, ocean energy devices, aquaculture, floating bridges, and submerged tunnels This comprehensive book covers important aspects of the required analysis and design of offshore structures and systems and the fundamental background material for offshore engineering. Whereas most of the books currently available in the field use traditional oil, gas, and ship industry examples in order to explain the fundamentals in offshore mechanics, this book uses more recent applications, including recent fixed-bottom and floating offshore platforms, ocean energy structures and systems such as wind turbines, wave energy converters, tidal turbines and hybrid marine platforms. Offshore Mechanics covers traditional and more recent methodologies used in offshore structure modelling (including SPH and hydroelasticity models). It also examines numerical techniques, including computational fluid dynamics and finite element method. Additionally, the book features easy-to-understand exercises and examples. Provides a comprehensive treatment for the case of recent applications in offshore mechanics for researchers and engineers Presents the subject of computational fluid dynamics (CFD) and finite element methods (FEM) along with the high fidelity numerical analysis of recent applications in offshore mechanics Offers insight into the philosophy and power of numerical simulations and an understanding of the mathematical nature of the fluid and structural dynamics with focus on offshore mechanic applications Offshore Mechanics: Structural and Fluid Dynamics for Recent Applications is an important book for graduate and senior undergraduate students in offshore engineering and for offshore engineers and researchers in the offshore industry.

Floating Offshore Wind Energy

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.

Ocean Waves

Ocean Waves
Author: Michel K. Ochi
Publisher: Cambridge University Press
Total Pages: 333
Release: 1998-03-28
Genre: Science
ISBN: 052156378X

Describes the stochastic method for ocean wave analysis - vital information for design and operation of ships.

Ocean Wave Energy

Ocean Wave Energy
Author: Joao Cruz
Publisher: Springer Science & Business Media
Total Pages: 435
Release: 2007-12-22
Genre: Technology & Engineering
ISBN: 3540748954

The authors of this timely reference provide an updated and global view on ocean wave energy conversion – and they do so for wave energy developers as well as for students and professors. The book is orientated to the practical solutions that this new industry has found so far and the problems that any device needs to face. It describes the actual principles applied to machines that convert wave power to electricity and examines state-of-the-art modern systems.

Dynamics of Fixed Marine Structures

Dynamics of Fixed Marine Structures
Author: N. D. P. Barltrop
Publisher: Butterworth-Heinemann
Total Pages: 785
Release: 2013-10-22
Genre: Technology & Engineering
ISBN: 1483162559

Dynamics of Fixed Marine Structures, Third Edition proves guidance on the dynamic design of fixed structures subject to wave and current action. The text is an update of the ""UR8"" design guide ""Dynamics of Marine Structures"" with discussion of foundations, wind turbulence, offshore installations, earthquakes, and strength and fatigue. The book employs analytical methods of static and dynamic structural analysis techniques, particularly the statistical and spectral methods when applied to loading and in the calculating dynamic responses. The statistical methods are explained when used to wave, wind, and earthquake calculations, together with the problems encountered in actual applications. Of importance to fixed offshore platforms are the soil properties and foundation covering soil behavior, site investigation, testing, seabed stability, gravity structures, and the use of single piles. Methods of forecasting, measuring, and modeling of waves and currents are also presented in offshore structure construction. Basic hydrodynamics is explained in understanding wave theory, and some description is given to forecasting of environmental conditions that will affect the structures. The effects of vortex-induced vibrations on the structure are explained, and the three methods that can prevent vortex-induced oscillations are given. Wind turbulence or wind loads are analyzed against short natural period or long natural periods of structures. The transportation of offshore platforms, installation, and pile driving, including examples of the applications found in the book, are given as well. The guide is helpful for offshore engineers, designers of inshore jetties, clients needing design and analysis work, specialists related to offshore structural engineering, and students in offshore engineering.

Design Aids of Offshore Structures Under Special Environmental Loads including Fire Resistance

Design Aids of Offshore Structures Under Special Environmental Loads including Fire Resistance
Author: Srinivasan Chandrasekaran
Publisher: Springer
Total Pages: 344
Release: 2018-01-12
Genre: Technology & Engineering
ISBN: 9811076081

This book provides detailed analysis methods and design guidelines for fire resistance, a vital consideration for offshore processing and production platforms. Recent advancements in the selection of various geometric structural forms for deep-water oil exploration and production require a detailed understanding of the design of offshore structures under special loads. Focusing on a relatively new aspect of offshore engineering, the book offers essential teaching material, illustrating and explaining the concepts discussed through many tutorials. It creates a basis for designing new courses for students of ocean engineering and naval architecture, civil engineering, and applied mechanics at both undergraduate and graduate levels. As such, its content can be used for self-study or as a text in structured courses and professional development programs.

Sea Loads on Ships and Offshore Structures

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.