analysisofsubframeinfluenceoncarbodybehaviour.docVIP

THE ANALYSIS OF SUBFRAME INFLUENCE ON CAR BODY BEHAVIOUR Milan Milovanovi?, PhD, Miroslav Demi?, PhD, professor, Sa?a Jovanovi?, MSc UDC:621.9-112.3 INTRODUCTION The level of success of the construction is the reflection of the design period, as shown in Figure 1, where the carrying construction of vehicle Zastava Yugo, designed in the 70-ties of the last century, is presented. The carrying construction was similar to the carrying construction of other FIAT models, with the frontal frame construction considerably influenced by the construction of the front vehicle suspension system. The functions of the front suspension system of the vehicle did not include the stiffening of the frontal frame. The designed directions of car body deformation are specific due to the characteristic position of front longitudinal supports, which direct deformation considerably towards longitudinal roof supports, and less towards car floor. There was no connection with the car floor elements on the frontal part, which was unfavourable from the aspect of carrying construction loading. Figure 1 Vehicle Yugo - car body Car body of vehicle Zastava10 is a car body of modern concept, with car body shown in Figure 2. Frontal frame was strengthened considerably; together with front vehicle suspension system, it makes a set which is of great importance for car body behaviour at front impact. The installed subframe the frontal frame. Front longitudinal supports, which direct deformation towards car floor, are also important. With the purpose of satisfying side impact conditions, side shell frame, with prominent pillar B and lateral longitudinal supports of floor, was strengthened considerably. Side door frame was strengthened additionally. Figure 2 Vehicle Zastava10 (Punto FIAT) - car body The carrying construction of this car body is also robust and adjusted to the by-law demands. With the aim of strengthening the construction, sheet metals of increased strength, which strengthen the construction