Numerical simulation of noise generated by multi asperity contact between rough surfaces

Viet Hung Dang (1) , Alain Le Bot (1) , Joël Perret Liaudet (1)

1 LTDS - Laboratoire de Tribologie et Dynamique des Systèmes

The friction between heterogeneous, rough and complex surfaces induces vibration in the solids and radiates noise in the surrounding media. In this study, we propose a numerical approach based on a modal development to estimate the statistical properties of local dynamics which cannot be obtained by experiments. The approach consists in three algorithms: the contact detection, the calculation of contact forces and the time integration of the governing equations. The validation of the method is then discussed by comparison with the finite element software Abaqus and some experimental results. The calculation results show that noise is an increasing function of the surface roughness and sliding speed. The basic mechanism responsible of noise is asperity shocks occurring at the interface that convert a part of the kinetic energy of the sliding solid into acoustical energy.

Mots clés: Numerical; Contact; Noise; Roughness

Domaines: Acoustique [physics.class-ph]

Viet Hung Dang, Alain Le Bot, Joël Perret Liaudet. Numerical simulation of noise generated by multi asperity contact between rough surfaces. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00811004⟩