VERTICAL DYNAMICS ANALYSIS OF A UTV VEHICLE, FROM A MODEL WITH 7 DEGREES OF FREEDOM IN IDEALIZED OBSTACLES

• DOI: 10.22533/at.ed.317342323017

• Palavras-chave: STOCHASTIC VIBRATIONS, OFF-ROAD VEHICLES, VIBRATE MODES, EXCITATION FORCES, TRANSMISSIBILITY.

• Keywords: STOCHASTIC VIBRATIONS, OFF-ROAD VEHICLES, VIBRATE MODES, EXCITATION FORCES, TRANSMISSIBILITY.

• Abstract:

  The stochastic vibrations are considerable in the operation of any UTV vehicle (Utility Task Vehicle), being necessary to analyze the dynamic behavior. The present work is based on the elaboration of a model with 7 degrees of freedom, full-car model, with the purpose of delimiting the behavior of the modes of vibrating, under the excitations of certain obstacles modeled analytically. These modes are represented by the movements occurring in the suspended mass: bounce, roll and pitch; and those associated with unsprung masses: wheel hop of each of the 4 independent suspensions. Due to the excitation loads, there must be a dynamic balance between the internal forces acting, since there is displacement of the mass elements and there are deflections in the elastic and damping elements. The present work also provides the obtainment of the natural frequencies and the modal profiles, through the development of an algorithm, such that it provides the understanding of the movement of the proposed model. As a result, natural frequencies and satisfactory transmissibilities are obtained.