nonlinear waves and offshore structures

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Nonlinear Waves And Offshore Structures

Author : Cheung Hun Kim
ISBN : 9789810248840
Genre : Technology & Engineering
File Size : 27. 22 MB
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The responses of offshore structures are significantly affected by steep nonlinear waves, currents and wind, leading to phenomena such as springing and ringing of TLPs, slow drift yaw motion of FPSOs and large oscillations of Spar platforms due to vortex shedding. Research has brought about significant progress in this field over the past few decades and introduced us to increasingly involved concepts and their diverse applicability. Thus, an in-depth understanding of steep nonlinear waves and their effects on the responses of offshore structures is essential for safe and effective designs.This book deals with analyses of nonlinear problems encountered in the design of offshore structures, as well as those that are of immediate practical interest to ocean engineers and designers. It presents conclusions drawn from recent research pertinent to nonlinear waves and their effects on the responses of offshore structures. Theories, observations and analyses of laboratory and field experiments are expounded such that the nonlinear effects can be clearly visualized.

Nonlinear And Stochastic Dynamics Of Compliant Offshore Structures

Author : Seon Mi Han
ISBN : 9789401599122
Genre : Technology & Engineering
File Size : 80. 5 MB
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The purpose of this monograph is to show how a compliant offshore structure in an ocean environment can be modeled in two and three di mensions. The monograph is divided into five parts. Chapter 1 provides the engineering motivation for this work, that is, offshore structures. These are very complex structures used for a variety of applications. It is possible to use beam models to initially study their dynamics. Chapter 2 is a review of variational methods, and thus includes the topics: princi ple of virtual work, D'Alembert's principle, Lagrange's equation, Hamil ton's principle, and the extended Hamilton's principle. These methods are used to derive the equations of motion throughout this monograph. Chapter 3 is a review of existing transverse beam models. They are the Euler-Bernoulli, Rayleigh, shear and Timoshenko models. The equa tions of motion are derived and solved analytically using the extended Hamilton's principle, as outlined in Chapter 2. For engineering purposes, the natural frequencies of the beam models are presented graphically as functions of normalized wave number and geometrical and physical pa rameters. Beam models are useful as representations of complex struc tures. In Chapter 4, a fluid force that is representative of those that act on offshore structures is formulated. The environmental load due to ocean current and random waves is obtained using Morison's equa tion. The random waves are formulated using the Pierson-Moskowitz spectrum with the Airy linear wave theory.

Dynamics Of Offshore Structures

Author : James F. Wilson
ISBN : 0471275654
Genre : Technology & Engineering
File Size : 85. 5 MB
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Unique, cutting-edge material on structural dynamics and natural forces for offshore structures Using the latest advances in theory and practice, Dynamics of Offshore Structures, Second Edition is extensively revised to cover all aspects of the physical forces, structural modeling, and mathematical methods necessary to effectively analyze the dynamic behavior of offshore structures. Both closed-form solutions and the Mathematica(r) software package are used in many of the up-to-date example problems to compute the deterministic and stochastic structural responses for such offshore structures as buoys; moored ships; and fixed-bottom, cable-stayed, and gravity-type platforms. Throughout the book, consideration is given to the many assumptions involved in formulating a structural model and to the natural forces encountered in the offshore environment. These analyses focus on plane motions of elastic structures with linear and nonlinear restraints, as well as motions induced by the forces of currents, winds, earthquakes, and waves, including the latest theories and information on wave mechanics. Topics addressed include multidegree of freedom linear structures, continuous system analysis (including the motion of cables and pipelines), submerged pile design, structural modal damping, fluid-structure-soil interactions, and single degree of freedom structural models that, together with plane wave loading theories, lead to deterministic or time history predictions of structural responses. These analyses are extended to statistical descriptions of both wave loading and structural motion. Dynamics of Offshore Structures, Second Edition is a valuable text for students in civil and mechanical engineering programs and an indispensable resource for structural, geotechnical, and construction engineers working with offshore projects.

Nonlinear Dynamics Of Compliant Offshore Structures

Author : Patrick Bar-Avi
ISBN : 9781351428231
Genre : Technology & Engineering
File Size : 49. 16 MB
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This monograph provides a general background to the modelling of a special class of offshore structures known as compliant structures. External forcing is resisted by buoyancy and tension forces which increase when the structure is slightly offset from its equilibrium. The technical development given in this book is presented in such a way as to highlight the adaptability of the modelling, and the reader is shown how the techniques described can be applied to a variety of different offshore structures.

Nonlinear Methods In Offshore Engineering

Author : Subrata Kumar Chakrabarti
ISBN : UOM:39015024764600
Genre : Technology & Engineering
File Size : 47. 81 MB
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Nonlinear Analysis Of Offshore Structures

Author : Bjørn Skallerud
ISBN : 0863802583
Genre : Mathematics
File Size : 65. 55 MB
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The importance of accounting for nonlinear effects in offshore structures has increased due to their higher utilization and extended service lives. This text addresses new methods for advanced analysis of offshore structures developed during the 1990s.

Wave Forces On Offshore Structures

Author : Turgut Sarpkaya
ISBN : 9780521896252
Genre : Science
File Size : 84. 71 MB
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This book provides a thorough understanding of the interaction of waves and currents with offshore structures.

Mechanics Of Wave Forces On Offshore Structures

Author : Turgut Sarpkaya
ISBN : 0442254024
Genre : Science
File Size : 62. 46 MB
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Boss 97 Behaviour Of Offshore Structures

Author : J. H. Vugts
ISBN : 0080428320
Genre : Technology & Engineering
File Size : 72. 64 MB
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Ocean Waves Mechanics Computational Fluid Dynamics And Mathematical Modelling

Author : Canadian Applied Mathematics Society. International Conference
ISBN : UCSD:31822005129739
Genre : Science
File Size : 51. 29 MB
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