The effect of uncoupled propulsion and steering on the manoeuvring behaviour in coastal waters
In: Ocean Engineering. Pergamon: Elmsford. ISSN 0029-8018; e-ISSN 1873-5258, more
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| Keywords |
Harbours and waterways > Manoeuvring behaviour > Open water
Physical modelling
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| Author keywords |
Twin rudder; Twin propeller; Uncoupled; EFD; Simulation |
| Abstract |
The present paper introduces a mathematical model capable of simulating the behaviour of a twin propeller, twin rudder ship in uncoupled conditions, meaning that the portside and starboard propeller and/or rudder work at different rates, respectively angles. Such conditions are typically applied while manoeuvring in harbour conditions. The mathematical model coefficients are determined based on a captive manoeuvring test program which covers these uncoupled conditions. After implementation in the ship manoeuvring simulator, fast-time simulations have been carried out, which were successfully compared with free running tests in uncoupled conditions as well. |
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