Chen, Junjie, Zang, Chaoping, Zhou, Biao and Petrov, EP (2018) A study of friction micro-slip modelling for dynamic analysis of bladed discs with root joints. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science. ISSN 0954-4062

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Abstract

In the machinery structures with joints the contact pressures at contact interfaces are usually high enough to ensure that the contacting components stay joined and the gross slip does not occur. Nevertheless, the small relative slip over parts of the contact interface, i.e. the micro-slip, contributes significantly to the vibration damping. In the high-fidelity analysis of practical bladed discs the macro-slip model cannot provide sufficient accuracy for the predictive analysis of the properties of the friction damping in the contact interfaces. In this article, numerical studies of micro-slip damping effects is performed using 2D and 3D models of blade root joints. Analysis of hysteresis loops is performed to assess the influence of modelling parameters: choice of reference points, mesh configurations and other physical parameters. The impact of physical parameters, such as the contact geometry, friction coefficient, contact stiffness and tangential and normal loading, on the friction damping are numerically examined. The numerical results demonstrate the possibilities of micro-slip prediction using finite element modelling and shows the micro-slip friction damping effects using simplified and realistic blade root models.

Item Type:	Article
Keywords:	Friction, micro-slip, bladed disk, root joints, dynamics, damping, dissipation
Schools and Departments:	School of Engineering and Informatics > Engineering and Design
Research Centres and Groups:	Dynamics, Control and Vehicle Research Group
Subjects:	T Technology > TJ Mechanical engineering and machinery
Depositing User:	Yevgen Petrov
Date Deposited:	16 Jul 2018 11:30
Last Modified:	29 Nov 2018 16:40
URI:	http://srodev.sussex.ac.uk/id/eprint/77196

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