A concept of determining the relation between load and wear of tribological systems of ship main selfignition engines by using probabilistic approach

• Autorzy: Girtler J.

Identyfikatory

DOI

10.2478/pomr-2018-0139

• Języki publikacji: EN

Abstrakty

EN

This paper presents a proposal of simultaneous consideration of load and wear associated with it , of tribological systems of ship main engines (intended for ship propulsion) . Based on results of investigations it was assumed that both the load Q (i.e. a cause of wear ) and the wear Z (i.e. an effect of load occurrence) considered in a given time t (0 ≤ t ≤ tn) are random variables Qt and Zt ,respectively. There was characterized operational principle of ship main engines in definite external conditions (WZ) as well as consequences of excessive load of engines. Three hypotheses highlighting relations existing between load and wear of the above mentioned systems, have been proposed. The first of them deals with explanation of stochastic relation between load and wear, the second highlights why it is possible to assume that the load Qt and the wear Zt are positively correlated , and the third – why it is possible to assume that coefficient of correlation between Qt and Zt may be taken close to one.

Słowa kluczowe

EN

combustion engine load; probability; stochastic process; self-ignition engine; random variable; statistical relation; stochastic relation

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2018
• Tom: nr 4
• Strony: 130--138
• Opis fizyczny: Bibliogr. 31 poz., rys.

Twórcy

autor

Girtler J.

• Department of Land and Marine Power Plants Faculty of Ocean Engineering and Ship Technology Gdansk University of Technology G. Narutowicza 11/12 80-233 Gdańsk

Bibliografia

• 1. Benjamin J. R., Cornell C. A.: Probability calculus, mathematical statistics and decision theory for engineers (in Polish). WNT, Warsaw, 1977.
• 2. Firkowicz S.: Statistical assessment of quality and reliability of electron tubes (in Polish). WNT, Warsaw, 1963.
• 3. Gercbach I.B., Kordonski Ch.B.: Reliability models of technical objects (in Polish). WNT, Warsaw,1968.
• 4. Girtler J.: Steering the operation process of ship combustion engines on the basis of diagnostic decision model (in Polish). Zeszyty Naukowe AMW, No. 100A, Gdynia,1989.
• 5. Girtler J.: Stochastic model of load spectrum of self-ignition engine (in Polish). Zagadnienia Eksploatacji Maszyn. PAN quarterly, iss. 1/97, 1994.
• 6. Girtler J., Kitowski Z., Kuriata A.: Safety of ship at sea. System approach (in Polish). WKiŁ, Warsaw, 1995.
• 7. Girtler J., Kuszmider S., Plewiński L.: Selected issues of operation of sea-going ships in the aspect of safety of navigation (in Polish). A monograph. WSM (Szczecin Maritime University), Szczecin, 2003.
• 8. Girtler J.: Features of load and wear of main propulsion devices on sea-going ships with piston combustion engines and their impact on changes in technical states of the systems. Polish Maritime Research. No. 4(96), Vol. 24, pp.57-66.
• 9. Girtler J.: Identification of damages of tribological associations in crankshaft and piston systems of two-stroke internal combustion engines used as main propulsion in sea-going vessels and proposal of probabilistic description of loads as causes of these damages. Polish Maritime Research. No. 2(86), Vol 22, pp. 44-54.
• 10. Jaščericyn P.I., Skorynin Ju.V.: Rabotosposobnost’ uzłov trenija mašin (in Russian) . Nauka i Technika, Minsk,1984.
• 11. Karpov Ł.N.: Nadežnost’ i kaczestwo sudovych dizelej (in Russian) . Transport, Moscow, 1985.
• 12. Kondratev N.N.: Otkazy i defekty sudovych dizelej (in Russian). Transport, Moscow, 1985.
• 13. Kozłowiecki H.: Bearings of piston combustion engines (in Polish). WKiŁ, Warsaw,1982.
• 14. Krzysztofiak M., Urbanek D.: Statistical methods (in Polish). PWN, Warsaw, 1979.
• 15. Michlin V.M.: Prognozirovanie techničeskogo sostojanija mašin (in Russian). Kołos, Moscow, 1976.
• 16. Niewczas A.: The rudiments for stochastic model of friction wear in issues of durability of machine elements (in Polish). Zeszyty Naukowe, Mechanika No. 19, Politechnika Radomska, 1989.
• 17. Pawłowski Z.: Mathematical statistics (in Polish). PWN, Warsaw, 1980.
• 18. Piotrowski I.: Ship combustion engines (in Polish). WM, Gdańsk, 1971.
• 19. Rudnicki J.: Application issues of the semi-Markov reliability model. Polish Maritime Research. No. 1(85)/2015, Vol. 22, pp. 55 – 64.
• 20. Urbański P.: The rudiments of ship propulsion (in Polish). Fundacja Rozwoju Akademii Morskiej, Gdynia, 2005.
• 21. Wajand J.A.: Self-ignition engines (in Polish). WNT, Warsaw 1980.
• 22. Wajand J.A., Wajand J.T.: Piston combustion engines of medium – and high – speed (in Polish). WNT, Warsaw, 2005.
• 23. Włodarski J.K.: Piston combustion engines .Tribological processes (in Polish). WKiŁ, Warsaw, 1981.
• 24. Wąsowicz J.: Ship power plants. Part 1 (in Polish). AMW, Gdynia, 1972.
• 25. Wojnowski W.: Ship combustion power plants. Part 1 and 2. (in Polish). AMW, Gdynia, 1999.
• 26. Voinov A.N.: Sgoranie v bystrochodnych poršnevych dvigateliach (in Russian). Mašinostroenie, Moscow, 1977.
• 27. Voznickij I.B., Ivanov Ł.A.: Predotvraščenie avarij sudovych dvigatelej vnutrennogo sgoranija (in Russian). Transport, Moscow, 1971.
• 28. Zwierzycki W. at al.: Selected issues of the wearing-out of materials in slide units of machines (in Polish). PWN, Warsaw-Poznań, 1990.
• 29. Girtler J.: Identification of working conditions of piston – crankshaft systems of ship main engines . (in Polish). Stage report from realization of the research project, titled: „Decision steering the operation process of piston – crankshaft systems of ship main engines with the use of technical diagnostics as well as with taking into account safety and environment protection”, conducted in the frame of the project No. N N509 494638 finacially supported by MNiSW. Supervisor: Prof. J. Girtler. Research report No.1/10 /PB. Faculty of Ocean Engineering and Ship Technology, Gdansk University of Technology, Gdańsk, 2010.
• 30. Girtler J., Łosiewicz Z: Analysis of features of a diagnostic model of of piston – crankshaft systems of engines, which is adjusted to needs of the rational steering of operation of the engines in the aspect of ship safety and sea environment protection (in Polish). Stage report from realization of the research project, titled: „Decision steering the operation process of piston – crankshaft systems of ship main engines with the use of technical diagnostics as well as with taking into account safety and environment protection”, conducted in the frame of the project No. N N509 494638 finacially supported by MNiSW. Supervisor: Prof. J. Girtler. Research report No.61/10 /PB. Faculty of Ocean Engineering and Ship Technology, Gdansk University of Technology, Gdańsk, 2010.
• 31. Włodarski J. K. at al.: Analysis of failure frequency of crankshafts and their bearings in A25 engines (in Polish). WSM, Gdynia,1987. Unpublished.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).