Energy analysis of the propulsion shaft fatigue process in a rotating mechanical system. Part II. Identification studies – developing the fatigue durability model of a drive shaft

• Autorzy: Korczewski Zbigniew , Marszałkowski Konrad

Identyfikatory

DOI

10.2478/pomr-2020-0033

• Języki publikacji: EN

Abstrakty

EN

The article presents a continuation of research carried out concerning identification of energy consequences of mechanical fatigue within a propeller shaft in a rotating mechanical system, while working under conditions of the loss of the required alignment of shaft lines. Experimental research was carried out on a physical model reflecting a full-sized real object: i.e., the propulsion system of the ship. It is proven, by means of an active experiment, that changes in propeller shaft deflection are reflected in the amount of dissipated kinetic energy of masses in rotational motion and the accumulated internal energy in its construction material. Adoption of a high-cycle fatigue syndrome, consisting of diagnostic symptoms determined from the action of the propeller shaft associated with the transformation of mechanical energy into work and heat, as well as with the generation of mechanical vibrations and elastic waves of acoustic emission, is proposed. To assess the diagnostic information quantity brought about by the defined features of propeller shaft fatigue, an experimental research program was developed and implemented, in which two statistical hypotheses are verified: the significance of the impact of the values enforcing the fatigue process, presented in the first part of the article, and the adequacy of the regression equation describing the fatigue durability of the propeller shaft in the energy aspect, constituting the second part of the article. This finally gives us the opportunity, after the appropriate translation of the model test results into full-sized real objects, to develop a methodology to diagnose marine propeller shaft fatigue in operating conditions. The third part of the article is devoted to this issue

Słowa kluczowe

EN

rotating mechanical system; modelling energy processes; propulsion shaft fatigue; testing statistical hypotheses

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2020
• Tom: nr 2
• Strony: 120--124
• Opis fizyczny: Bibliogr. 13 poz., rys., tab.

Twórcy

autor

Korczewski Zbigniew

• Gdańsk University of Technology Narutowicza 11/12, 80-233 Gdańsk, Poland

autor

Marszałkowski Konrad

• Gdańsk University of Technology Narutowicza 11/12, 80-233 Gdańsk, Poland

Bibliografia

• 1. Kluczyk M., Grządziela A. (2017): Vibration Diagnostics of the Naval Propulsion Systems. Scientific Journal of Polish Naval Academy. 1 (208).
• 2. Korczewski Z. (2012): The Conception of Energetic Investigations of the Multisymptom Fatigue of the Simple Mechanical Systems Constructional Materials. Journal of Polish CIMAC, 7(1), 99-108.
• 3. Korczewski Z. (2017): Diagnostyka eksploatacyjna okrętowych silników spalinowych –tłokowych i turbinowych. Wybrane zagadnienia. Gdańsk. Wydawnictwo Politechniki Gdańskiej.
• 4. Korczewski Z. (2017): A Method to Assess Transverse Vibration Energy of Ship Propeller Shaft for Diagnostic Purposes. Polish Maritime Research, 24 (4), 102-107.
• 5. Korczewski Z., Marszałkowski K. (2016): Physical Model of Energy-Related Processes in a Rotating Mechanical System for the Purposes of Diagnosis of Transmission Shafts. Journal of Polish CIMEEAC, 11(1).
• 6. Korczewski Z., Marszałkowski K. (2018): Energy Analysis of Propulsion Shaft Fatigue Process in Rotating Mechanical System. Part I. Testing Significance of Influence of Shaft Material Fatigue Excitation Parameters. Polish Maritime Research, 25(1), 211-217.
• 7. Korzyński M. (2006): Metodyka eksperymentu. Warszawa. Wydawnictwa Naukowo-Techniczne.
• 8. Kufel. T. (2013): Ekonometria Rozwiązywanie problemów z wykorzystaniem programu GRETL. Warszawa. Wydawnictwo Naukowe PWN.
• 9. Maddala G.S. (2006): Ekonometria. Warszawa. Wydawnictwo Naukowe PWN.
• 10. Marszałkowski K. (2019): Modelowanie procesów energetycznych w obrotowym układzie mechanicznym dla potrzeb diagnozowania zmęczenia okrętowych wałów napędowych. Rozprawa doktorska. Politechnika Gdańska, Wydział Oceanotechniki i Okrętownictwa.
• 11. Murawski L. (2005): Shaft Line Alignment Analysis Taking Ship Construction Flexibility and Deformation into Consideration. Marine Structures, 18, 62-84.
• 12. Osińska M. (2007): Ekonometria współczesna. Toruń. Towarzystwo Naukowe Organizacji i Kierownictwa “Dom Organizatora”.
• 13. Vizentin G., Vukelić G., Srok M., (2017): Common Failures of Ship Propulsion Shafts. Scientific Journal of Maritime Research, 31, 85-90.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).