Analysis of the dynamics of passenger cars with McPherson strut suspension systems in the MSC.ADAMS software environment with taking into account the friction in shock absorbers
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The paper presents a method to analyse the dynamics of passenger cars with McPherson strut suspension systems, which will make it possible to consider the friction that takes place between major components, i.e. piston rod and cylinder, of front shock absorbers. The analysis was carried out with making use of modern tools to support the engineering design process, i.e. the Autodesk Inventor program (used to work out geometric models of the car under consideration), and the MSC.ADAMS software (in the environment of which the dynamics of the structural model of the car under consideration was analysed). The analysis included investigation of the tendency exhibited by a car to have variations in the distribution of car body weight among road wheels at sudden lane-change manoeuvres, especially in the case of previous severe defect (oil outflow) of one of the car shock absorbers as a result of which the shock absorber would fail to function fully. In such a situation, dry friction may occur between mating parts of the defective shock absorbers, which would impede (or even prevent) relative translational motion of the parts. In the authors' opinion, the study presented may be interesting for designers of McPherson strut suspension systems for automotive vehicles.
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