涡轮增压器动力学建模及振动特性研究

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Abstract Using the multi-body dynamics theory and FEM, a multi-body system simulation model was established for a certain vehicle’s turbocharger with floating ring bearing.Based on the modal synthesis method, flexible body sub-structure models for turbocharger housing and rotor were built.Based on the generalized incompressible Reynolds equation, an elastic hydro-dynamic (EHD) lubrication model for the turbocharger’s floating ring bearing was established to calculateinner and outer oil films’ pressures, rotor vibration characteristics and turbocharger housing’s surface vibration velocity.The calculation results were verified with test ones.The results showed that the modeling method adopting the flexible multi-body dynamics and the EHD bearing lubrication model can be used to effectively analyze the turbocharger vibration characteristics; this method provides a theoretical basis for studying turbocharger’s synchronous vibration, sub-synchronous one and noise problem.

Key words： multi-body dynamics vibration characteristics finite element method (FEM) turbocharger elastic hydro-dynamic (EHD)

Received: 27 April 2018 Published: 28 November 2019

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	Articles by authors
	GU Cansong1
	2
	YUAN Zhaocheng1
	LIU Jiaxin1
	YANG Zhengrui2
	LI Hongliang2

Cite this article:

GU Cansong1,2,YUAN Zhaocheng1, et al. Dynamic modeling for a turbocharger and its vibration characteristics[J]. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(23): 70-76.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2019/V38/I23/70

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