Design Optimization of a Marine Propeller Shaft for Enhanced Fatigue Life: An Integrated Computational Approach
This study investigates the design and potential failure modes of a marine propeller shaft using computational and analytical methods. The aim is to assess the structural integrity of the existing design and propose modifications for improved reliability and service life. Analytical calculations bas...
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| Language: | English |
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MDPI AG
2024-12-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/12/12/2227 |
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| author | Víctor Tuninetti Diego Martínez Sunny Narayan Brahim Menacer Angelo Oñate |
| author_facet | Víctor Tuninetti Diego Martínez Sunny Narayan Brahim Menacer Angelo Oñate |
| author_sort | Víctor Tuninetti |
| collection | DOAJ |
| description | This study investigates the design and potential failure modes of a marine propeller shaft using computational and analytical methods. The aim is to assess the structural integrity of the existing design and propose modifications for improved reliability and service life. Analytical calculations based on classification society rules determined acceptable shaft diameter ranges, considering torsional shear stress limits for SAE 1030 steel. A Campbell diagram analysis identified potential resonance issues at propeller blade excitation frequencies, leading to a recommended operating speed reduction for a safety margin. Support spacing was determined using both the Ship Vibration Design Guide and an empirical method, with the former yielding more conservative results. Finite element analysis, focusing on the keyway area, revealed stress concentrations approaching the material’s ultimate strength. A mesh sensitivity analysis ensured accurate stress predictions. A round-ended rectangular key geometry modification showed a significant stress reduction. Fatigue life analysis using the Goodman equation, incorporating various factors, predicted infinite life under different loading conditions, but varying safety factors highlighted the impact of these conditions. The FEA revealed that the original keyway design led to stress concentrations exceeding allowable limits, correlating with potential shaft failure. The proposed round-ended rectangular key geometry significantly reduced stress, mitigating the risk of fatigue crack initiation. This research contributes to the development of more reliable marine propulsion systems by demonstrating the efficacy of integrating analytical methods, finite element simulations, and fatigue life predictions in the design process. |
| format | Article |
| id | doaj-art-b6cfeee8fac1447da10a3ec6c199ad35 |
| institution | DOAJ |
| issn | 2077-1312 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj-art-b6cfeee8fac1447da10a3ec6c199ad352025-08-20T02:53:38ZengMDPI AGJournal of Marine Science and Engineering2077-13122024-12-011212222710.3390/jmse12122227Design Optimization of a Marine Propeller Shaft for Enhanced Fatigue Life: An Integrated Computational ApproachVíctor Tuninetti0Diego Martínez1Sunny Narayan2Brahim Menacer3Angelo Oñate4Department of Mechanical Engineering, Universidad de La Frontera, Temuco 4811230, ChileDepartment of Mechanical Engineering, Universidad de La Frontera, Temuco 4811230, ChileDepartment of Mechanics and Advanced Materials, Campus Monterrey, School of Engineering and Sciences, Tecnológico de Monterrey, Av. Eugenio Garza Sada 2501 Sur, Tecnológico, Monterrey 64849, Nuevo León, MexicoLaboratoire des Systèmes Complexe, Ecole Supérieure en Génie Electrique et Energétique, Chemin Vicinal 9, Oran 31000, AlgeriaDepartment of Materials Engineering, Faculty of Engineering, Universidad de Concepcion, Edmundo Larenas 315, Concepcion 4070138, ChileThis study investigates the design and potential failure modes of a marine propeller shaft using computational and analytical methods. The aim is to assess the structural integrity of the existing design and propose modifications for improved reliability and service life. Analytical calculations based on classification society rules determined acceptable shaft diameter ranges, considering torsional shear stress limits for SAE 1030 steel. A Campbell diagram analysis identified potential resonance issues at propeller blade excitation frequencies, leading to a recommended operating speed reduction for a safety margin. Support spacing was determined using both the Ship Vibration Design Guide and an empirical method, with the former yielding more conservative results. Finite element analysis, focusing on the keyway area, revealed stress concentrations approaching the material’s ultimate strength. A mesh sensitivity analysis ensured accurate stress predictions. A round-ended rectangular key geometry modification showed a significant stress reduction. Fatigue life analysis using the Goodman equation, incorporating various factors, predicted infinite life under different loading conditions, but varying safety factors highlighted the impact of these conditions. The FEA revealed that the original keyway design led to stress concentrations exceeding allowable limits, correlating with potential shaft failure. The proposed round-ended rectangular key geometry significantly reduced stress, mitigating the risk of fatigue crack initiation. This research contributes to the development of more reliable marine propulsion systems by demonstrating the efficacy of integrating analytical methods, finite element simulations, and fatigue life predictions in the design process.https://www.mdpi.com/2077-1312/12/12/2227marine propeller shaftfailure analysiskeyway designfatigue life analysisstrengthstress concentration |
| spellingShingle | Víctor Tuninetti Diego Martínez Sunny Narayan Brahim Menacer Angelo Oñate Design Optimization of a Marine Propeller Shaft for Enhanced Fatigue Life: An Integrated Computational Approach Journal of Marine Science and Engineering marine propeller shaft failure analysis keyway design fatigue life analysis strength stress concentration |
| title | Design Optimization of a Marine Propeller Shaft for Enhanced Fatigue Life: An Integrated Computational Approach |
| title_full | Design Optimization of a Marine Propeller Shaft for Enhanced Fatigue Life: An Integrated Computational Approach |
| title_fullStr | Design Optimization of a Marine Propeller Shaft for Enhanced Fatigue Life: An Integrated Computational Approach |
| title_full_unstemmed | Design Optimization of a Marine Propeller Shaft for Enhanced Fatigue Life: An Integrated Computational Approach |
| title_short | Design Optimization of a Marine Propeller Shaft for Enhanced Fatigue Life: An Integrated Computational Approach |
| title_sort | design optimization of a marine propeller shaft for enhanced fatigue life an integrated computational approach |
| topic | marine propeller shaft failure analysis keyway design fatigue life analysis strength stress concentration |
| url | https://www.mdpi.com/2077-1312/12/12/2227 |
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