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Automotive suspension systems are designed to allow the driver full control of the vehicle. These systems must efficiently ensure the vibration insulation of the car cabin, the tire grip on the road and the vehicle’s stability during turning maneuvers. In this study, an experimental investigation of the dynamic behavior of a subcompact premium car was conducted. Typical ride and handling maneuvers were considered in the physical tests in order to evaluate the steering response and passengers comfort. Vehicle handling refers to the way that the vehicle performs during turning maneuvers, and ride to how the vehicle suspension responds to the track irregularities during the act of driving. This work describes the methodology used for the development of a full vehicle model through the multibody method. In mathematical modeling, the majority of vehicle suspension components were included in the model as rigid bodies, due to the fact the elastic deformations are sufficiently small and hence negligible. However, there is the presence of some flexible elements, in particular the stabilizer bar and the twist beam, which are essential in the attempt to build a model capable of properly reproducing the nonlinear effects. Accordingly, the stabilizer bar was represented as a flexible body, in order to include geometric non-linearity into the model. The modeling of the twist beam was based on a co-simulation technique that uses a multibody solver and an external nonlinear solver for finite element method analysis. Dynamic behavior simulations were performed to verify the scope of the model and correlated with the experimental data. The ride comfort study was carried out emphasizing the required metric to quantify the vehicle comfort according to ISO 2631-1. The data collected were processed and analyzed in frequency and time domain using the LMS Test.Lab software. The building and simulation of the virtual model was performed using the LMS Virtual.Lab Motion software for the multibody simulation and LMS Samcef MECANO software for the finite element simulation.

Estudo do comportamento dinâmico de um veículo da categoria premium sob a técnica de multicorpos