000007675 001__ 7675
000007675 005__ 20240531164759.0
000007675 02470 $$2doi$$a10.24868/issn.2515-818X.2020.033
000007675 035__ $$a4486876
000007675 037__ $$aGENERAL
000007675 245__ $$aA Modelling Approach for Predicting Marine Engines Shaft Dynamics
000007675 269__ $$a2020-10-05
000007675 336__ $$aConference Proceedings
000007675 520__ $$aFor making decisions on maintenance and operations of ship systems in a timely and cost effective way, intelligent approaches for continuously assessing the critical ship systems condition are required. This study aims to provide a framework for large marine two-stroke diesel engines performance assessment, by mapping the relationship of specific malfunctioning engine conditions on the Instantaneous Crankshaft Torque (ICT). This is accomplished by the development of a thermodynamics model, which is coupled with a lumped mass crankshaft dynamics model, in order to predict the engine shaft dynamics and torsional response. Subsequently, by employing the coupled engine models, a number of case studies are simulated for investigating the influence on the engine ICT, which include: (a) change in the Start of Injection (SOI), (b) change in the Rate of Heat Release (RHR), (c) change in the scavenge air pressure, and (d) leaking exhaust valve. By investigating the predicted ICT from the coupled model in both the time and frequency domains, distinct frequencies are identified, which correspond to specific engine malfunctioning conditions. Based on the derived results, these engine malfunctioning conditions are mapped with the frequencies most affected in the engine’s instantaneous torque, which demonstrate the usefulness of implementing the the ICT measurement for diagnostic purposes.
000007675 542__ $$fCC-BY-4.0
000007675 6531_ $$aMalfunctions engine conditions mapping
000007675 6531_ $$aEngine maintenance
000007675 6531_ $$aShafting dynamics
000007675 6531_ $$aLumped-mass model
000007675 6531_ $$aTwo-stroke internal combustion engine
000007675 7001_ $$aTsitsilonis, KM$$uMaritime Safety Research Centre, Department of Naval Architecture, Ocean & Marine Engineering, University of Strathclyde
000007675 7001_ $$aTheotokatos, G$$uMaritime Safety Research Centre, Department of Naval Architecture, Ocean & Marine Engineering, University of Strathclyde
000007675 7001_ $$aHabens, M$$uDatum Electronics Ltd.,
000007675 773__ $$tConference Proceedings of INEC
000007675 773__ $$jINEC 2020
000007675 789__ $$whttps://zenodo.org/record/4486876$$2URL$$eIsIdenticalTo
000007675 85641 $$uhttps://www.imarest.org/events/inec-2020$$yConference website
000007675 8564_ $$91540865a-0698-444d-8634-7fdba0a27eb6$$s1166337$$uhttps://library.imarest.org/record/7675/files/INEC_2020_Paper_47.pdf