Vibration and Noise Characteristics of an Aircraft-Type Gas Turbine Used in a Marine Propulsion System

1969 ◽  
Author(s):  
R. E. Harper
Keyword(s):  
Gas Turbine ◽  
Vibration Isolation ◽  
Propulsion System ◽  
Noise Levels ◽  
Vibration Data ◽  
Noise Characteristics ◽  
Marine Propulsion ◽  
Antisubmarine Warfare ◽  
Aircraft Type ◽  
Marine Propulsion System

Sound and vibration data measured on a combination diesel gas turbine propulsion system in a 2000-ton antisubmarine warfare ship are presented. The data can be considered representative of the noise levels, both structureborne and airborne, that can be expected in an installation of this or a similar type. Examples of the attenuation of structureborne noise through selected structural joints illustrate the vibration isolation attainable through the use of lightweight aircraft-type structures.

scholarly journals Metamodels of a gas turbine powered marine propulsion system for simulation and diagnostic purposes

2015 ◽  
Vol 12 (1) ◽  
pp. 1-14 ◽  
Author(s):  
U. Campora ◽  
M. Capelli ◽  
C. Cravero ◽  
R. Zaccone
Keyword(s):  
Gas Turbine ◽  
Response Surfaces ◽  
Propulsion System ◽  
Direct Simulation ◽  
Analysis Method ◽  
Simulation Code ◽  
Marine Propulsion ◽  
Performance Reduction ◽  
Input Variables ◽  
Marine Propulsion System

The paper presents the application of artificial neural network for simulation and diagnostic purposes applied to a gas turbine powered marine propulsion plant. A simulation code for the propulsion system, developed by the authors, has been extended to take into account components degradation or malfunctioning with the addition of performance reduction coefficients. The above coefficients become input variables to the analysis method and define the system status at a given operating point. The simulator is used to generate databases needed to perform a variable selection analysis and to tune response surfaces for both direct (simulation) and inverse (diagnostic) purposes. The application of the methodology to the propulsion system of an existing frigate version demonstrate the potential of the approach.

Modeling and simulation of a two-shaft gas turbine propulsion system containing a frictional plate–type clutch

2018 ◽  
Vol 233 (2) ◽  
pp. 502-514 ◽  
Author(s):  
Morteza Montazeri-Gh ◽  
Seyed Alireza Miran Fashandi
Keyword(s):  
Gas Turbine ◽  
Computer Simulations ◽  
Experimental Tests ◽  
Bond Graph ◽  
Propulsion System ◽  
System Structure ◽  
Modeling Framework ◽  
Variable Model ◽  
Marine Propulsion ◽  
Marine Propulsion System

A marine propulsion system is composed of several sub-systems that operate in a variety of energy fields. The propulsion power of a ship can be provided from a two-shaft gas turbine. In this article, the modeling of a two-shaft gas turbine and its associated sub-systems including gears, flexible couplings and clutch is considered. These components are connected in the form of a virtual marine propulsion system, which is based on the bond-graph approach. When a clutch is used in a propulsion system, discontinuities occur in the describing model, which leads to some challenging problems when performing computer simulations. The two main difficulties are the numerical stiffness and the variable model structure. In this research, the bond-graph method is adapted as the modeling framework in order to allow a constant system structure model that minimizes the stiffness problem. Next, simulation results of a two-shaft gas turbine are presented in the off-design condition and verified with experimental tests. These results demonstrate the acceptable accuracy of computer simulations. Also, the effects of clutch performance on the dynamics of the marine propulsion system are discussed.

THE DEVELOPMENT OF A LINEAR INDUCTION MOTOR AS A MARINE PROPULSION SYSTEM

2016 ◽  
Vol 158 (B1) ◽  
Author(s):  
M Geor ◽  
S Hooper ◽  
S Tamakai ◽  
A P R Taylor
Keyword(s):  
Induction Motor ◽  
Propulsion System ◽  
Secondary Reaction ◽  
Test Results ◽  
Linear Induction ◽  
Linear Induction Motor ◽  
Speed Test ◽  
Working Model ◽  
Marine Propulsion ◽  
Marine Propulsion System

The Linear Induction Motor (LIM) has been employed as an actuator in conveyers and more recently aircraft launches, and some work has been done on LIMs with a curved secondary reaction plate. This paper presents a working model of a marinised LIM-boat system, with underwater stator operating the hull of a boat which acts as reaction plate. The LIM stator is shown to propel the boat through the water, and that with certain reaction plate metals it will track over the stator coils and therefore be controllable in both direction and speed. Test results for differing coils and reaction plate combinations are provided.

scholarly journals Shaft power measurement for marine propulsion system based on magnetic resonances

2012 ◽  
Vol 9 (15) ◽  
pp. 1260-1265 ◽  
Author(s):  
Li Qin ◽  
Xincong Zhou ◽  
Yan Gao ◽  
Pengju Cao ◽  
Jianzhou Quan ◽  
...  
Keyword(s):  
Propulsion System ◽  
Power Measurement ◽  
Marine Propulsion ◽  
Shaft Power ◽  
Magnetic Resonances ◽  
Marine Propulsion System
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