A polynomial chaos approach to the robust analysis of the dynamic behaviour of friction systems |
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| Authors: | Lyes Nechak Sébastien Berger Evelyne Aubry |
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| Institution: | 1. Zienkiewicz Centre for Computational Engineering, College of Engineering, Swansea University, Swansea SA1 8EN, UK;2. Applied and Computational Mechanics, Cardiff School of Engineering, Queen’s building, The Parade, Cardiff CF24 3AA, UK;1. Ecole Centrale de Lyon, Laboratoire de Tribologie et Dynamique de Systèmes, CNRS, France;2. Institut d’Optique Graduate School, Laboratoire Charles Fabry, CNRS, France;1. School of Aeronautic Science and Engineering, Beihang University, Beijing, China;2. Department of Mechanical, Materials and Aerospace Engineering, University of Liverpool, Liverpool L69 3GH, UK |
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| Abstract: | This paper presents a dynamic behaviour study of non-linear friction systems subject to uncertain friction laws. The main aspects are the analysis of the stability and the associated non-linear amplitude around the steady-state equilibrium. As friction systems are highly sensitive to the dispersion of friction laws, it is necessary to take into account the uncertainty of the friction coefficient to obtain stability intervals and to estimate the extreme magnitudes of oscillations. Intrusive and non-intrusive methods based on the polynomial chaos theory are proposed to tackle these problems. The efficiency of these methods is investigated in a two degree of freedom system representing a drum brake system. The proposed methods prove to be interesting alternatives to the classic methods such as parametric studies and Monte Carlo based techniques. |
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