Seakeeping Characteristics of Surface Effect Ships
Author: R. D. Waldo
Publisher:
Published: 1997
Total Pages: 24
ISBN-13:
DOWNLOAD EBOOKPosts
Seakeeping Characteristics of the XR-5, A High Length-Beam Ratio Manned Surface Effect Testcraft: III. Results of Random Wave Experiments Investigation of Linear Superposition for Ship Motions and Trim and Draft in Random Waves
Author: Joseph J. Ricci
Publisher:
Published: 1976
Total Pages: 63
ISBN-13:
DOWNLOAD EBOOKMotion responses derived from model experimental results in regular and irregular head waves for the XR-5 high length-beam ratio surface effect ship are presented. Frequency response functions for pitch, heave, relative bow motion, heave acceleration and bow acceleration were computed from the random wave experiments and are presented herein. Comparisons are made with responses derived from regular wave experiments. The results indicate that the rigid body motions are reasonably linear for the Froude numbers and sea conditions investigated. Nonlinear effects that increase with the severity of the sea state are evident in the accelerations. In addition, the motion of the stern seal with respect to the relative motion at the stern is presented. These responses are generally linear although some nonlinear effects appear with increasing Froude number. Probability distributions for the double amplitude of wave height, heave and pitch are presented. Comparisons are made with Rayleigh probability distributions based on the variances of the sample data and on the minimum Chi Square estimators computed from the distributions. (Author).
The Maritime Engineering Reference Book
Author: Anthony F. Molland
Publisher: Elsevier
Published: 2011-10-13
Total Pages: 921
ISBN-13: 0080560091
DOWNLOAD EBOOKThe Maritime Engineering Reference Book is a one-stop source for engineers involved in marine engineering and naval architecture. In this essential reference, Anthony F. Molland has brought together the work of a number of the world's leading writers in the field to create an inclusive volume for a wide audience of marine engineers, naval architects and those involved in marine operations, insurance and other related fields. Coverage ranges from the basics to more advanced topics in ship design, construction and operation. All the key areas are covered, including ship flotation and stability, ship structures, propulsion, seakeeping and maneuvering. The marine environment and maritime safety are explored as well as new technologies, such as computer aided ship design and remotely operated vehicles (ROVs).Facts, figures and data from world-leading experts makes this an invaluable ready-reference for those involved in the field of maritime engineering.Professor A.F. Molland, BSc, MSc, PhD, CEng, FRINA. is Emeritus Professor of Ship Design at the University of Southampton, UK. He has lectured ship design and operation for many years. He has carried out extensive research and published widely on ship design and various aspects of ship hydrodynamics.* A comprehensive overview from best-selling authors including Bryan Barrass, Rawson and Tupper, and David Eyres* Covers basic and advanced material on marine engineering and Naval Architecture topics* Have key facts, figures and data to hand in one complete reference book
Side-by-Side Seakeeping and Power Plant Comparisons of the Surface Effect Ships (SES) USCGC SEA HAWK and USN SES-200
Author:
Publisher:
Published: 1990
Total Pages: 140
ISBN-13:
DOWNLOAD EBOOKThe performance characteristics of the U.S. Coast Guard 110' Surface Effect Ship (SES) CGC SEA HAWK and 160' U.S. Navy SES-200 are documented and compared. Engine performance in calm water and side-by-side rough water sea keeping performance tests were conducted in the Atlantic Ocean south of the Key West, Florida. The SES-200 ride control system was evaluated in the seaway. THe NASA Ride Quality Meter and Bruel and Kjaer Human Response Vibration Meter are compared and were used to document the discomfort level and human fatigue on board the SEA HAWK.
A Methodology for Quantifying the Operational Effects of Ship Seakeeping Characteristics
Author: Stephen R. Olson
Publisher:
Published: 1977
Total Pages: 100
ISBN-13:
DOWNLOAD EBOOKThis paper presents a methodology for quantifying the operational effects of the seakeeping characteristics of ships and documents the computer program developed for this purpose. Potential modifications that can be applied to the program are also discussed. (Author).
Surface Effect Ships for Ocean Commerce (SESOC)
Author: United States. SESOC Advisory Committee
Publisher:
Published: 1966
Total Pages: 68
ISBN-13:
DOWNLOAD EBOOKShip Design
Author: Apostolos Papanikolaou
Publisher: Springer
Published: 2014-09-16
Total Pages: 635
ISBN-13: 9401787514
DOWNLOAD EBOOKThis book deals with ship design and in particular with methodologies of the preliminary design of ships. The book is complemented by a basic bibliography and five appendices with useful updated charts for the selection of the main dimensions and other basic characteristics of different types of ships (Appendix A), the determination of hull form from the data of systematic hull form series (Appendix B), the detailed description of the relational method for the preliminary estimation of ship weights (Appendix C), a brief review of the historical evolution of shipbuilding science and technology from the prehistoric era to date (Appendix D) and finally a historical review of regulatory developments of ship's damage stability to date (Appendix E). The book can be used as textbook for ship design courses or as additional reading for university or college students of naval architecture courses and related disciplines; it may also serve as a reference book for naval architects, practicing engineers of related disciplines and ship officers, who like to enter the ship design field systematically or to use practical methodologies for the estimation of ship's main dimensions and of other ship main properties and elements of ship design.
Seakeeping Characteristics of the Xr-5, a High Length-beam Ratio Manned Surface Effect Testcraft
Author: Allen H. Magnuson
Publisher:
Published: 1975
Total Pages: 89
ISBN-13:
DOWNLOAD EBOOKMotion response data for regular waves in head seas is presented for a model of a high length/beam ratio surface effect ship (SES). Data is presented in normalized form for pitch, heave, relative bow velocity, relative bow motion, stern seal motion, bow acceleration and heave acceleration. The pitch motion data exhibits a resonant or underdamped behavior governed by a constant natural frequency throughout the speed range investigated. The wave pumping effect was observed in the supercritical frequency range, and was particularly evident in the normalized acceleration data. The relative bow motion exhibits a pronounced peak at a frequency slightly above the pitching natural frequency.
Seakeeping Characteristics of the XR-5, a High Length-Beam Ratio Manned Surface Effect Testcraft: II. Results of Linearity Investigation, Effects of Changes from Reference Operating Condition and Trim and Draft in Regular Waves
Author: Allen H. Magnuson
Publisher:
Published: 1975
Total Pages: 53
ISBN-13:
DOWNLOAD EBOOKMotion responses in regular head waves for the XR-5 high length-beam ratio surface effect ship are presented. Frequency response functions based on an equivalent amplitude derived from the total energy are presented for pitch, heave, relative bow motion, heave acceleration and bow acceleration. These are compared with responses computed from the first harmonic component of each signal. The results show that the pitch, heave, relative bow motion and bow acceleration exhibit linear behavior for the Froude numbers investigated. Some nonlinear behavior is evident in the heave acceleration at frequencies near the natural frequency in pitch. The effect of varying lift fans and duct valve settings on the response is determined. The pitch magnification is shown to increase when the duct valves are opened beyond the reference settings. Trim angles and drafts for the reference operating condition are presented as a function of encounter frequency for three speeds. The results indicate a moderate variation in trim and draft with frequency.
Hydrodynamics of High-Speed Marine Vehicles
Author: Odd M. Faltinsen
Publisher: Cambridge University Press
Published: 2006-01-09
Total Pages: 490
ISBN-13: 1139447939
DOWNLOAD EBOOKHydrodynamics of High-Speed Marine Vehicles, first published in 2006, discusses the three main categories of high-speed marine vehicles - vessels supported by submerged hulls, air cushions or foils. The wave environment, resistance, propulsion, seakeeping, sea loads and manoeuvring are extensively covered based on rational and simplified methods. Links to automatic control and structural mechanics are emphasized. A detailed description of waterjet propulsion is given and the effect of water depth on wash, resistance, sinkage and trim is discussed. Chapter topics include resistance and wash; slamming; air cushion-supported vessels, including a detailed discussion of wave-excited resonant oscillations in air cushion; and hydrofoil vessels. The book contains numerous illustrations, examples and exercises.
