Improvement of the Frontal Structure of a Bus for Crash Accidents

Abstract

The increasing legal and customer demands on passive safety of automobiles have to be fulfilled under the conditions of shortened development times and cost reductions. Today the design process of a bus with regard to its crashworthiness function is driven by a virtual development. A wide range of different applications has to be covered by simulation influencing the design of body-in-white, interior and exterior trim, chassis and power train. In recent days more emphasis has been given to Passenger bus rollover analysis and side impact but the study of frontal impact behaviour of the passenger bus is ignored. The finite element analysis is used for estimating the damage of the passenger bus due to the frontal crash. The vehicle model is allowed to frontal crash with rigid material. The deformation and displacement characteristics of the structure are analyzed at different speeds. Geometric modeling of the bus structure has been created by using CATIA cad package and discritized by ANSYS LS-Dyna. The numerical simulation is carried out for different velocities of bus structure. The results of displacement during collision are plotted on the graph. Some improvements were suggested in the body structure after analysing different types of crack initiators.

The analysis of deformations of the frame in a basic minibus and a low floor minibus

“…While examining issues related to safety of vehicles, not only the critical parameters of their movement [1] or circumstances of traffic events [2] shall be analyzed; in addition, safety and strength of the vehicle's construction shall be analyzed upon striving to make sure that it really ensures a safety both of the driver and the passengers [3]. In case of a frontal impact, the driver usually suffers heavier injuries, as compared to the passengers, and in case of a lateral impact, the injuries of the driver are less serious [4].…”