Dynamics of Offshore Structures (Google eBook)

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James F. Wilson
John Wiley & Sons, Jan 17, 2003 - Technology & Engineering - 344 pages
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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.

  

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Contents

1 Structures in the Offshore Environment
1
2 StructureEnvironmental Force Interactions
17
3 Deterministic Descriptions of Offshore Waves
61
4 Wave Forces on Structures
84
5 Deterministic Responses for Single Degree of Freedom Structures
100
6 Statistical Descriptions of Offshore Waves
144
7 Statistical Responses for Single Degree of Freedom Linear Structures
165
8 MultiDegree of Freedom Linear Structures
195
9 Applications of MultiDegree of Freedom Analysis
223
10 Continuous Systems
248
11 Behavior of Piles Supporting Offshore Structures
289
Conversion Table
321
Index
323
Copyright

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Page xii - He received his Bachelor's and Master's degrees in Civil Engineering from The University of Texas at Austin and his Ph.D.
Page xiii - Engineers (AIEE) in 1912, and the American Society of Mechanical Engineers (ASME) and the American Society of...
Page 5 - ... concrete mat on the sea floor. With ballast consisting of sand in the bottom of the tanks and seawater in the legs, these structures depend on self-weight alone to maintain an upright position when subjected to the highest waves that are expected to occur in a 100 year time period. A realistic 100 year wave that may occur in the northern North Sea is 27.8 m. At present, the largest concrete gravity platform is the Troll structure, and one of moderate size is the Statfjord-A Condeep structure,...
Page 6 - Lena, which was installed in the early 1980s in the Gulf of Mexico. Including its three-level drilling and production deck and its drilling rigs, this tower reaches a total height of 400 m. Each of the 20 stabilizing cables, attached 25 m below the water line and arranged symmetrically about the structure, extends a horizontal distance of about 1000 m to a line of clumped weights that rest on the sea floor, to an anchor cable and an anchor pile. Under normal weather or small storm conditions, the...
Page 1 - ... functions and engineering features of these structures, together with their supporting components (mooring systems and pipelines), are discussed in this article. Offshore mooring systems have a variety of configurations. All have anchors or groups of piles in the seabed with flexible cables (ropes or chains) leading from them to buoys, ships, or platform structures. The function of a mooring system is to keep the buoy, ship, or platform structure at a relatively fixed location during engineering...

About the author (2003)

JAMES F. WILSON, PHD, is Professor Emeritus in the Department of Civil and Environmental Engineering at Duke University. He has earned numerous awards and authored several hundred papers, along with five previous books.

BRUCE J. MUGA, PHD, is Professor Emeritus in the Department of Civil and Environmental Engineering at Duke University. During his career, he worked with the U.S. Naval Civil Engineering Laboratory in Port Hueneme, California.

LYMON C. REESE, PHD, is the Nasser I. Al-Rashid Chair Emeritus and Professor of Civil Engineering at the University of Texas in Austin. He is also principal at Ensoft, Inc., a distributor of engineering software, and a consultant with Lymon C. Reese & Associates, a subsidiary of Ensoft.

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