Author: United States. Coast Guard. Office of Engineering. Icebreaker Design Branch
Publisher:
ISBN:
Category : Icebreakers (Ships)
Languages : en
Pages :

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Author: Jack W. Lewis
Publisher:
ISBN:
Category :
Languages : en
Pages : 109

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Book Description
This report discusses a digital computer dynamic simulation program for a vessel with a diesel-electric propulsion system. The mathematical formulation of the problem is fully developed and the computer program used to solve the equations is presented. A comparison of the computer simulation predictions of key variables during maneuvers of the USCGC GLACIER and actual oscillograph recordings of these same variables is presented. The correlation between predicted and measured values is good and it is concluded that the simulation program will be an effective tooling in analyzing the performance of new icebreaker designs. (Author).

Author: United States. Coast Guard. Office of Engineering
Publisher:
ISBN:
Category : Icebreakers (Ships)
Languages : en
Pages : 514

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Author: Fred W. Scoville
Publisher:
ISBN:
Category :
Languages : en
Pages : 101

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This report discusses the simulation of a diesel electric propulsion system for an icebreaker using AC generators and rectified DC for the propulsion motors. A comparison is made between an icebreaker using this system and one using a more conventional electric propulsion system. (Author).

Author: Jack W. Lewis
Publisher:
ISBN:
Category :
Languages : en
Pages : 105

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Book Description
A feasible design of the main propulsion system for the M-13 icebreaker is presented in this final report of a four phase study. Procedures are described that were used in meeting given performance specifications covering open water and icebreaking, operations and maneuvers. The automatic controls necessary to meet the performance specifications are developed. Results of the steady-state design analysis and dynamic performance analysis are presented, and an overall evaluation including major conclusions is included. (Author).

Author: Jack W. Lewis
Publisher:
ISBN:
Category :
Languages : en
Pages : 266

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Book Description
This program solves numerically the set of simultaneous non-linear differential equations which describe the dynamic behavior of the complete propulsion system (including vessel dynamics) of a diesel-electric icebreaker during maneuvering. The program also contains a means of subjecting the propeller to ice impact loadings of the user's making. At the option of the user, input data can readily be printed for documentation purposes and output data can be plotted. (Author).

Author: Jack W. Lewis
Publisher:
ISBN:
Category :
Languages : en
Pages : 67

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Book Description
This phase of the Icebreaker Propulsion System Simulation reports on the results of studies directed at improving the overall in-ice icebreaker performance through improved propulsion system design. A mathematical description of the ice-torque problem for dynamic and quasi-steady state behavior is presented, and additional propulsion system electrical circuit dynamics necessary to more adequately describe propulsion system dynamic behavior during propeller-ice encounters are described. The predicted performance of the USCGC GLACIER when subjected to the ice load torque model is presented. A load control scheme (designed to extend the constant horsepower range of the propulsion system well below bollard propeller speed) is developed and incorporated into the basic system equations. The performance of a system of the same size as the GLACIER incorporating this load control system and subjected to the same ice loads is also presented. It is concluded that the incorporation of a load control system significantly increases the capability of the icebreaker propulsion system when operating in ice. (Author).

Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 992

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Book Description

Author: Igor Bolvashenkov
Publisher: Nova Science Publishers
ISBN: 9781536173307
Category : Transportation
Languages : en
Pages : 177

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Book Description
"For a large number of countries, the task of Arctic exploration and implementation of year-round navigation along the Northern Sea Route, which has become a reality today due to global warming, has become increasingly relevant in recent years. In turn, its solution requires the creation of a multi-purpose Arctic fleet, consisting of modern icebreaker ships with efficient and fault-tolerant propulsion systems, fully compliant with the specific operational conditions of the Arctic. In the last decade, due to the significantly increased interest to the new transport connection between West Europe and the Far East and the growth of various cargo traffic (oil, gas, containers, etc.) by the Northern Sea Route, the need of a significant increase of quantity and capacity of icebreaker cargo fleet has appeared. In order to maintain year-round navigation in the Northern Sea Route in the next few years, ships for various purposes are planned to be built (multipurpose and universal ships, supply ships, lighters, oil and gas tankers, hovercrafts, and others), which are intended for operation in the seas of the Arctic basin. Comprehensive efficiency of transportation process in the Arctic seas depends not only on the planning and coordination activities of the fleets and harbors, but also on the ships' technical characteristics. It means that icebreaker ships should have appropriate special features, accordingly to the requirements for navigation in the Arctic ice conditions. The results of the presented scientific research, which are based on statistical operational data from the 1980s, determined the main directions for development of today's modern icebreaker ships designed for Arctic operation in specific ice conditions. Considering that the projects of year-round navigation along the Northern Sea Route, which have become a reality today, the task of creating corresponding ships with highly reliable and fault-tolerant electric propulsion systems is extremely relevant today. The proposed systematic methodology of the choice of the appropriate type of propulsion system for icebreaker cargo Arctic ships was confirmed by many years of successful operational experience in the ice navigational conditions. During the design process of icebreaker ships, the question about choice of ship's propulsion system arises, taking into account a power-producing unit and propeller, coupled with the frame of the ship. The correct solution of this problem has a significant value for the further operation of the ship. The aim of this book is to provide a comprehensive presentation of multicriteria operational efficiency analysis of the competing ship's propulsion systems that would be most suitable for icebreaker Arctic ships, taking into account the real operating conditions of ice navigation"--

Author: Arctec Canada Limited
Publisher:
ISBN:
Category : Icebreakers (Ships)
Languages : en
Pages : 50

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Book Description