Simulación ante vuelco de un autobús con chasis Hino model FC9J y carrocería IMCE utilizando LS DYNA para validar la ubicación del centro de gravedad mediante la determinación experimental en base al reglamento N.º 66 CEPE-ONU

Abstract

The main objective of this work is to simulate a bus with a Hino chassis model FC9J and IMCE bodywork in a rollover situation using LS DYNA to validate the location of the centre of gravity by means of experimental determination based on UNECE Regulation No 66. The proposed methodology allows for the development of a general procedure to obtain results based on simulations of complete mass passenger transport vehicles modelled in 3D using CAD tools involving the parameters set out in Regulation 66 UN ECE to verify the location of the centre of gravity and analyse the behaviour of the structure when subjected to a rollover test. This experimentation is carried out by means of computer tools that allow results to be obtained as close as possible to reality by means of multi-physical simulations of bus models. The values and parameters involved in the study are: mass of a finished bus, technical data of the chassis, requirements stated in the above-mentioned regulations necessary to determine the location of the centre of gravity, verify the resistance of the structure and the integrity of the survival space. Once the study was completed, it was concluded that the selected bus model approved the approval process presented by the Ecuadorian Standardization Service and therefore is a candidate to meet the parameters of Regulation 66 UN ECE, verifying little deformation of the structure and the integrity of the survival space without the existence of intrusions of structural elements. The value of the total energy produced during the rollover test is 9.78x107 N-mm. The verification of the behaviour of the centre of gravity according to the mass in running order is verifiable in accordance with the two models proposed.