Diseño y análisis de un sistema anti empotramiento posterior en buses, para colisiones de vehículos tipo M1 mediante software CAD/CAE según el RTE INEN 034 y UNECE R58 para carrocerías M&L.

Abstract

The objective of the present technological proposal is to present a design and analysis of an anti-embedment bar on an urban bus, for collisions of vehicles type MI using CAD / CAE software for the bodywork company M&L in order to implement passive safety in an eventual rear-hit accident between an MI vehicle and a bus. With the revision of the RTE INEN 034 and UNECE R58, the specifications and methodologies to be applied were identified. The regulations indicate the supports that work as clamp between the bar and the bus chassis, must have a minimum of six holes on each side for adjustments by means of bolts and nuts, in addition to determining the test speed at 56 km / h. The bar must be at a height of 550 mm with respect to the floor. For the verification of ASTM A36 material used in our study, we used traction tests carried out in the Metal-mechanic Productive Development Centers of the city of Ambato, in addition simulations were performed using software specialized in finite elements in which resistance and elongation of the bar after impact were tested. With the study carried out, it was determined that when there is an anti-embedment bar in the rear part of an urban bus body, the MI vehicle is not embedded under the bus in case of an eventual collision. By means of the analysis developed, the anti-embedment device model that meets the homologation requirements described in the UNECE N58 regulation was determined.