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Assessing the influence of the running-in phase in ship’s stern tube bearings on wear development during ice collision loads
Citation Link: https://doi.org/10.15480/882.9318
Publikationstyp
Conference Paper
Date Issued
2024-04-04
Sprache
English
Author(s)
Institute for Machine Elements and Systems Engineering, RWTH Aachen University, Aachen, Germany
Institute for Machine Elements and Systems Engineering, RWTH Aachen University, Aachen, Germany
Institute for Machine Elements and Systems Engineering, RWTH Aachen University, Aachen, Germany
Institute for Machine Elements and Systems Engineering, RWTH Aachen University, Aachen, Germany
TORE-DOI
Start Page
171
End Page
180
Citation
8th International Symposium on Marine Propulsors (smp 2024)
Contribution to Conference
Publisher
Norwegian University of Science and Technology, Department of Marine Technology
ISBN
978-82-691120-5-4
Peer Reviewed
true
Climate change causes increasing ship activity in polar regions, leading to more frequent propeller-ice collisions. These collisions result in extreme impulse loads on aft stern tube bearings, potentially causing bearing wear and failure. Existing studies often overlook variations in bearing surface roughness and contours during the running-in phase, leading to incorrect mixed-friction regime calculations. This study presents a new approach to calculate running-in wear in the aft stern tube bearings of the research vessel SA Agulhas II. It combines downscaled experiments and numerical simulations to determine postrunning-in phase surface roughness. The study reveals the significant influence of the running-in phase on wear risk of the bearing, especially for operating conditions near the transition from mixed to fluid friction regimes. However, for operating conditions causing severe mixed-friction regimes, the influence of the running-in phase on the wear risk is minimal. The highest wear risk occurs for rotational speeds of 90-100 rpm and ice-induced propeller torques of 650-700 kNm. This wear risk assessment can serve as a foundation for operator guidance and maintenance plans to ensure safe vessel operation in ice-covered waters.
Subjects
Stern tube bearings
Wear model
Running-in phase
Elasto-hydrodynamic simulation (EHD)
Bearing down scaling
DDC Class
620: Engineering
Publication version
publishedVersion
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Name
Saleh-AssessingTheInfluenceOfTheRunninginPhaseInShipsSternTubeBearings-1130-1-final.pdf
Type
Main Article
Size
1.54 MB
Format
Adobe PDF