Title: A new method for estimating amplitudes of torsional vibration for engine crankshafts

Authors: X. Zhengchang, R.J. Anderson

Addresses: The Second Automobile Works, Shiyun, Hubei Province, People's Republic of China. ' Department of Mechanical Engineering, Queen's University, Kingston, Ontario, Canada

Abstract: This paper presents a complex idealised mathematical model and a new method for determining the forced torsional vibration amplitudes of crankshafts in IC engines. The model is a multi-mass formulation, containing all gas torques from the cylinders and all types of damping of the individual engine parts. In particular, dry friction damping, a non-linear effect caused by auxiliaries, is brought into the model. A new method for calculating the dynamic response of a non-linear system of this type is described. For the purpose of efficiency of calculation, an effective numerical procedure for solving a non-linear torsional vibration system is developed.

Keywords: torsional vibration; automobile engines; crankshafts; torsional amplitude; dynamic analysis; IC engines; engine design; vibrational modelling; digital simulation; mathematical modelling; vehicle design.

DOI: 10.1504/IJVD.1988.061485

International Journal of Vehicle Design, 1988 Vol.9 No.2, pp.252 - 261

Published online: 26 May 2014 *

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