A propulsion dynamics investigation of a single-screw powered ship, driven by two gas turbines in a combined gas and gas (COGAG) arrangement is presented. Distributed-lumped (hybrid) modelling techniques are applied to the propulsion drive-train consisting of two prime movers, a primary drive shaft, a reduction gearbox, a secondary drive shaft and a propeller. The study in this paper, unlike earlier studies, does not lump the drive-train components as discussed by Rubis into analytically simple but unrepresentative pointwise models. By way of contrast, modelling and simulation techniques for distributed-lumped systems are presented herein, enabling the torsional vibration and stress analysis of the long drive shafts to be investigated with accuracy. As a result of this a torque control scheme can be derived for fuel flow regulation purposes, enabling superior speed and shaft torque control to be achieved. The results presented show the simulated dynamic responses associated with the propulsion unit, shaft and propeller following fuel flow changes.
Hybrid modelling, simulation and torque control of a marine propulsion system
Hybride Modellierung, Simulation und Drehmomentregelung eines Schiffantriebssystems
1999
10 Seiten, 12 Bilder, 1 Tabelle, 5 Quellen
Article (Journal)
English
MARINE PROPULSION - Cat Introduces Hybrid Marine Propulsion System
Online Contents | 2013