Three-dimensional vibration of the crankshaft of a large marine diesel engine under a mixed thermo-elastic-hydro-dynamic lubrication coupling between flexible crankshaft and engine block

[+] Author and Article Information
Lidui Wei

Merchant Marine College, Shanghai Maritime University, 1550 Haigang Ave, Shanghai, P.R.China 201306

Haijun Wei

Merchant Marine College, Shanghai Maritime University, 1550 Haigang Ave, Shanghai, P.R.China 201306

Haiping Du

School of Electrical, Computer and Telecommunications Engineering, University of Wollongong, Northfields Ave, Wollongong, NSW 2552, Australia

Shulin Duan

Marine Engineering College, Dalian Maritime University, 1 Linghai Rd, Dalian, P.R.China 116026

1Corresponding author.

ASME doi:10.1115/1.4038457 History: Received January 15, 2017; Revised September 08, 2017


To predict the vibration characteristics of the crankshaft of the larger marine diesel engine accurately and comprehensively, based on the finite element models of the crankshaft and the engine block reduced by a component mode synthesis method as well as extended Reynolds equation and Greenwood-Tripp theory, a mixed thermo-elasto-hydro-dynamic lubrication coupling model between a whole flexible engine block and a rotating flexible crankshaft is set up. According to this strongly coupled nonlinear model, the torsional-axial-lateral three-dimensional vibration of the crankshaft can be calculated simultaneously. The method is verified through comparison with other computational methods. Also, the vibrations are compared under different support models and whether to consider the effect of temperature. Specific three-dimensional vibrations are displayed, and some stage nonlinear characteristics are showed in three-dimensional direction. The modeling method will contribute to reveal the vibration mechanism and optimize the design of the shafting system.

Copyright (c) 2017 by ASME
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