Nonlinear vibration characteristics of marine turbocharger rotor system

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (9) : 213-218.

ZHANG Hong LIU Zhang-fei

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Abstract

Aiming at the rotor dynamics problem of one self-designed marine turbocharger. Considering the nonlinear oil-film force effect, a finite element model of rotor bearing system was established. The critical speed nonlinear vibration spectrum and orbits of the rotor system were obtained by rotor dynamics numerical simulation. Through comparative analyzing vibration characteristics caused by the nonlinear oil film force and unbalance, the nonlinear dynamics behaviors of turbocharger rotor bearing system were discussed to explore the primary cause of vibration of rotor system. The influence of inlet lubricating oil temperature and bearing clearance on the system vibration was presented, and the structure design and optimization method were proposed to restrain vibration of turbocharger rotor system.

Key words

Marine turbocharger；Rotor-bearing system / Rotor dynamics；Nonlinear vibration

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ZHANG Hong LIU Zhang-fei. Nonlinear vibration characteristics of marine turbocharger rotor system[J]. Journal of Vibration and Shock, 2016, 35(9): 213-218

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