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Digital Library

of the European Council for Modelling and Simulation

 

Title:

Propulsion Machinery Operating In Ice – A Modelling And Simulation Approach

Authors:

Drazen Polic, Soeren Ehlers, Vilmar AEsoy, Eilif Pedersen

Published in:

 

(2013).ECMS 2013 Proceedings edited by: W. Rekdalsbakken, R. T. Bye, H. Zhang  European Council for Modeling and Simulation. doi:10.7148/2013

 

ISBN: 978-0-9564944-6-7

 

27th European Conference on Modelling and Simulation,

Aalesund, Norway, May 27th – 30th, 2013

 

Citation format:

Drazen Polic, Soeren Ehlers, Vilmar AEsoy, Eilif Pedersen (2013). Propulsion Machinery Operating In Ice – A Modelling And Simulation Approach, ECMS 2013 Proceedings edited by: W. Rekdalsbakken, R. T. Bye, H. Zhang, European Council for Modeling and Simulation. doi:10.7148/2013-0191

 

DOI:

http://dx.doi.org/10.7148/2013-0191

Abstract:

Shipping activity and offshore operations in Arctic areas are increasing as a result of more effective transportation routes and oil/gas exploration. Vessels navigating in ice covered areas are exposed to additional loads from different ice conditions. In this paper the dynamic loads on propellers are investigated to better understand the impact on propeller, power transmission elements and engine. An ice-propeller interaction model is implemented with a full propulsion machinery to simulate the systems response to ice loads. The ice load models are developed based on the DNV and IACS rules for ice-propellers. Modelling and simulation of interactive multi body systems is a rather complex task, involving hydrodynamics, mechanics, electronics and control systems. This paper describes an approach to link the different models to simulate the overall system response and the interactions between the sub-systems. Therein, the rule-based ice loads are implemented in two ways for comparison: a) a coupled and b) an uncoupled treatment of the ice load and system response. The simulation results show that the dynamic peak loads are 10-20% lower than the maximum peaks predicted by the uncoupled simulation, i.e. conventional rule-based. Simulations also show that the peak loads are damped through the transmission elements, and therefore reducing the load on critical machinery components.

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