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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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