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Application of the Optimization Methods to the Search of Marine Propulsion Shafting Global Equilibrium in Running Condition

Abstract

Full film hydrodynamic lubrication of marine propulsion shafting journal bearings in running condition is discussed. Considerable computational difficulties in non-linear determining the quasi-static equilibrium of the shafting are highlighted. The approach using two optimization methods (the particle swarm method and the interior point method) in combination with the specially developed relaxation technique is proposed to overcome this problem. The developed algorithm allows calculating marine propulsion shafting bending taking into account lubrication in all journal bearings and exact form of journal inside bearings, compared to most of the publications that consider lubrication only in the aftmost stern tube bearing and suppose rest of bearings as pointwise. The calculation results of typical shafting design with four bearings are provided. The significance of taking into account lubrication in all bearings is shown, specifically more exact values of bearings’ reactions, shafting deflections, minimum film thickness and maximum hydrodynamic pressure in the stern tube bearing in case of considering lubrication in all bearings.

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Category:
Articles
Type:
artykuły w czasopismach
Published in:
Polish Maritime Research no. 26, pages 172 - 180,
ISSN: 1233-2585
Language:
English
Publication year:
2019
Bibliographic description:
Ursolov A., Batrak Y., Tarełko W.: Application of the Optimization Methods to the Search of Marine Propulsion Shafting Global Equilibrium in Running Condition// Polish Maritime Research -Vol. 26,iss. 3 (2019), s.172-180
DOI:
Digital Object Identifier (open in new tab) 10.2478/pomr-2019-0058
Bibliography: test
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