Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Stochastic analysis of 1-DOF vehicle suspension system employing asymmetrical damping
Submission Author:
Júlio César Moraes Fernandes , SP
Co-Authors:
Marcos Silveira, José Manoel Balthazar, Júlio César Moraes Fernandes
Presenter: Júlio César Moraes Fernandes
doi://10.26678/ABCM.COBEM2017.COB17-0150
Abstract
Ground vehicles are subject to the vibrations induced by the pavement in which they travel. The pavement needs to have acceptable roughness index in order to provide low impact without compromising tire contact. However, vehicles still need to be equipped with suspension systems to minimize the effects of road imperfections. For analysis of suspension systems, the irregularities contained in the road can be described by the elevation profile itself or by its statistical characteristics. Thus, ISO 8608:1995 specifies a uniform method for characterizing the vertical profile of roads, streets, highways and unpaved roads. The profile of the road can be generated through approximate stochastic functions through the power spectral density of the signal. In this work, the modeling of the pavement profile is shown according to ISO 8608:1995 for different roughness classes and a quarter-car model with asymmetrical damping is used to represent the vehicle. Sinusoidal approximation is used for the pavement profile. The main objective of this work is to analyze the suspension system employing asymmetrical damping, in which the stochastic excitation comes from a sinusoidal approximation and the road profile parameters are described by ISO 8608:1995.
Keywords
Stochastic road profile, asymmetrical damping, suspension system, Vehicle Dynamics
