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Maneuvering Response

Maneuvering Response
Author: P. Aranow
Publisher:
Total Pages: 166
Release: 1983
Genre: Inland navigation
ISBN:

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Ship Maneuvering Response

Ship Maneuvering Response
Author: William McIlroy
Publisher:
Total Pages: 27
Release: 1983
Genre:
ISBN:

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Maneuvering Response

Maneuvering Response
Author: P. Aranow
Publisher:
Total Pages:
Release: 1983
Genre: Inland navigation
ISBN:

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STUDIES OF SHIP MANEUVERING 'RESPONSE TO PROPELLER AND RUDDER ACTIONS'

STUDIES OF SHIP MANEUVERING 'RESPONSE TO PROPELLER AND RUDDER ACTIONS'
Author:
Publisher:
Total Pages: 45
Release: 1965
Genre:
ISBN:

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An attempt is made to extend ship-maneuvering analysis for application at low ship speeds. Captive-model experiments are made to investigate effects of non-equilibrium propeller speeds on rudder force and effective thrust. Other experiments are made to explore first-order effects of very large drift angles and pure yaw rotation on hull hydrodynamic reactions. The experimental results, together with previous rotating-arm data, are applied in motion equations, accounting for both extreme propeller actions and the occurrence of large drift angles and turning rates. Also included are propulsion and rudder time lags, and the influence of uniform water current on ship trajectory. The equations are programmed for computation, and ship response to a simple docking maneuver is predicted. The computation is repeated several times to examine sensitivity of ship motions and trajectory to variations of operating parameters, namely, maximum reverse propeller speed, engine response time, and water-current direction.


Practical Ship Hydrodynamics

Practical Ship Hydrodynamics
Author: Volker Bertram
Publisher: Elsevier
Total Pages: 392
Release: 2012
Genre: Science
ISBN: 0080971504

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Practical Ship Hydrodynamics provides a comprehensive overview of hydrodynamic experimental and numerical methods for ship resistance and propulsion, maneuvering, seakeeping and vibration. Beginning with an overview of problems and approaches, including the basics of modeling and full scale testing, expert author Volker Bertram introduces the marine applications of computational fluid dynamics and boundary element methods. Expanded and updated, this new edition includes: Otherwise disparate information on the factors affecting ship hydrodynamics, combined to provide one practical, go-to resource. Full coverage of new developments in computational methods and model testing techniques relating to marine design and development. New chapters on hydrodynamic aspects of ship vibrations and hydrodynamic options for fuel efficiency, and increased coverage of simple design estimates of hydrodynamic quantities such as resistance and wake fraction. With a strong focus on essential background for real-life modeling, this book is an ideal reference for practicing naval architects and graduate students.


Response of Slowly Moving Ship to Propeller and Rudder Actions

Response of Slowly Moving Ship to Propeller and Rudder Actions
Author: C. Lincoln Crane (Jr)
Publisher:
Total Pages: 67
Release: 1966
Genre:
ISBN:

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An attempt is made to extend ship maneuvering analysis for application at low ship speeds. Experiments are made with captive-model to investigate effects of non-equilibrium propeller speeds on rudder force and effective thrust. Other experiments are made to explore first-order effects of very large drift angles and pure yaw rotation on hull hydrodynamic reactions. The experimental results, together with previous rotating-arm data, are applied in motion equations, accounting for both extreme propeller actions and the occurrence of large drift angles and turning rates. Also included are propulsion and rudder time lags, and the influence of uniform water-current on ship trajectory. The equations are programmed for computation, and ship response to a simple docking maneuver is predicted. The computation is repeated several times to examine sensitivity of ship motions and trajectory to variations of operating parameters; namely, maximum reverse propeller-speed, engine response time, and water-current direction. (Author).


Ship Maneuvering, Including the Effects of Transient Motions

Ship Maneuvering, Including the Effects of Transient Motions
Author: Carl Alden Scragg
Publisher:
Total Pages: 220
Release: 1976
Genre: Ships
ISBN:

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In the traditional approach to the problems of ship maneuvering, on uses a set of linearized equations of motion that excludes the possibility that the hydrodynamic forces and moments might be affected by the history of the motion. Using ideas introduced by Cummins, one can obtain another linearized set of the equations of motion which contains a 'memory function' as well as the added mass and damping coefficients. These stability coefficients have been evaluated by an impulse-response techniques, a method that is new to ship maneuvering problems and that appears to represent a substantial improvement over the traditional regular-oscillatory-motion tests. Results from both experimental methods are presented for comparison. To examine the effect of the memory function upon predictions of standard ship maneuvers, predictions of a few standard maneuvers have been calculated using both sets of the linearized equations of motion. The differences between the predicted motions were found to be small for all the cases we examined. (Author).