Modeling effect on the performance of impact and friction vibration absorbers

National Engineering School of Tunis, PB 37, Le Belvedere 1002, Tunis, Tunisia

^a Corresponding author: Charfeddine.Mrad@enit.rnu.tn

Received: 10 June 2016
Accepted: 1 August 2016

Abstract

Impact and friction vibration absorbers are introduced in mechanical systems to attenuate their vibrations with dissipating the vibratory energy through respectively collision or friction between both bodies. However, the contact between both bodies for both cases deserves to be investigated closely. This work aims firstly to study the effect of the collision modeling on the impact absorber efficiency. The impact is modeled under several forms: linear, semi-linear, and nonlinear; accordingly to elastic and viscous behaviors. The modeling, then the formulation, then the resolution of the problem are conducted for each case. The forced responses of the system are obtained, and a comparison is made to conclude on the absorber performance. This work aims secondly to examine the effect of friction modeling on the friction absorber efficiency. Two modeling approaches are considered: macroscopic and microscopic; accordingly to physical and tribological behaviors. The problem modeling is elaborated, followed by a formulation, then a resolution, to determine the forced responses of the system for different friction models. A comparison is made later to conclude on the friction absorber performance.