Projeto de um dispositivo mecânico idealizado para realização de ensaios de vibração baseados no modelo quarter car

Abstract

Within the most current engineering scenarios, where performance, safety and quality need to be increasingly associated with financial parameters, developing methods to test the product seeking the best dimensioning is essential. In the various sectors where engineering operates, the automotive sector stands out as the most developed in terms of research. This work focused on the development of the design of a mechanical device that allows for academic purposes the performance of vibration tests based on the classic model called quarter car, this model is used to predict the behavior of the suspension in relation to the perceived comfort and safety in the automobile at an early design level. The device is designed to generate runnable tests on the SENTEK DYNAMICS® BT-100 shaker. Different analyzes were carried out by developing a numerical model with Matlab® software to arrive at the properties in which the model, although in smaller proportions, presented results consistent with the classic model. Using Solidworks® software, the project was carried out by modeling the components so that it can be adjusted to obtain different simulations, alternating the stiffness of the springs, weights of the masses and the damping factor. It was demonstrated the use of the device to generate tests that validate the vibration frequencies of the system and the effects caused by the alteration of the suspension stiffness. [resumo fornecido pelo autor]