Analysis methods of crankshaft's stiffness characteristics

• Autorzy: Murawski L. , Charchalis A.
• Języki publikacji: EN

Abstrakty

EN

Development of on-line diagnostic (monitoring) method of marine propulsion system working parameters is the authors' target. Crankshaft springing characteristics are one of the most important from the ships' main engines reliability point of view. Planned monitoring system will be able to verify crankshaft springing characteristics by continuous measurements of the crankshaft free-end's axial deformations. Development of the analysis methods of crankshaft's stiffness characteristics is the first step of planned SHM system. The main purpose of research is method developing of the springing analysis for the marine crankshafts in the high-power engines. Crankshaft modeling method, by Finite Element Method, has been discussed. Short overview of the crankshaft boundary conditions is presented. Bearings' oil film stiffness characteristics, ship hull stiffness characteristics and temperature deformation of the ship hull and main engine body are taking into account. Influence of the crankshaft's foundation stiffness on springing values is analysed. During the analyses it was proved that flexibility of engine foundation has a big influence upon the value of crankshaft springing. The authors' method of cylindrical mass and gas forces decompositions has been presented. Analysis of modeling precision of piston-crank system's forces has been performed. Results of calculations are well compatible in the terms of quality with the measurements data.

Słowa kluczowe

EN

marine engine; power transmission system; marine propulsion system; crankshaft springing; shaft line; boundary conditions

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2013
• Tom: Vol. 20, No. 1
• Strony: 219--226
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Murawski L.

• Gdynia Maritime University Faculty of Marine Engineering Morska Street 81-87, 81-225 Gdynia, Poland tel.: [phone], fax: [phone]

autor

Charchalis A.

• Gdynia Maritime University Faculty of Marine Engineering Morska Street 81-87, 81-225 Gdynia, Poland tel.: [phone], fax: [phone]

Bibliografia

• [1] Glisic, B., Inaudi, D., Fiber Optic Methods for Structural Health Monitoring, John Wiley & Sons, Hoboken, West Suessex 2007.
• [2] Miszczak, A., Viscoelastic unsteady lubrication of radial slide journal bearing at impulsive motion, Polish Maritime Research, Vol. 40(2), pp. 9-21, 2004.
• [3] Murawski, L., Shaft line alignment analysis taking ship construction flexibility and deformations into consideration, Marine Structures, No 1, Vol. 18, pp. 62-84, 2005.
• [4] Murawski, L., Shaft line whirling vibrations: effects of numerical assumptions on analysis results, Marine Technology and SNAME News, Vol. 42(2), pp. 53-61, 2005.
• [5] Murawski, L., Szmyt, M., Stifness characteristics and thermal deformations of the frame of high power marine engine, Polish Maritime Research No 1(51), Vol. 14, pp. 16-22, 2007.
• [6] Schiffer, W., Jenzer, J., 3–D shafting calculations for marine installations: static and dynamic, Proceedings of ICES03, Salzburg 2003.
• [7] Guidance notes on propulsion shafting alignment, American Bureau of Shipping, Houston 2004.
• [8] Elasto-hydro-dynamic evaluation of main bearing performance, MAN B&W Diesel A/S., Copenhagen 2002.
• [9] Shafting alignment for direct coupled low-speed diesel propulsion plants, MAN B&W Diesel A/S, Copenhagen 1995.
• [10] Sulzer RTA-C, Technology Review, Wartsila, Helsinki 2003.