EVALUATION OF THE ROAD BUS BODY SEAT SETTING SUBMITTED TO FRONTAL IMPACT

Abstract

INTER-MUNICIPAL TRANSPORTATION BY BUS IS NOW A COLLECTIVE MEAN OF TRANSPORTATION MUCH SOUGHT AFTER BY PEOPLE. SECURITY IN ACCIDENTS IS A VERY IMPORTANT FACTOR THAT MUST BE TAKEN INTO ACCOUNT IN THE REALIZATION OF THE PROJECT OF BUS BODY STRUCTURE, AN ASSESSMENT OF THE SAFETY OF PASSENGERS OF THIS TYPE OF VEHICLE IS AN IMPORTANT ITEM THAT SHOULD BE CHECKED, AS MANY ACCIDENTS THE SEATS LOOSE THEMSELVES FROM THE INSIDE OF THE VEHICLE CAUSING SERIOUS PASSENGERS INJURY, OFTEN FATAL. THIS WORK AIMS TO CONDUCT AN EVALUATION OF THE STRUCTURE SETTING PERFORMANCE ON ROAD BUS BODY SEAT, SUBMITTED TO THE FRONTAL IMPACT SITUATION IN A RIGID WALL OF 100% OFFSET, THROUGH EVALUATION BY FINITE ELEMENT METHOD (FEM). THIS STUDY USES A NUMERICAL MODEL CORRESPONDING TO THE BODY STRUCTURE AND CHASSIS, DEVELOPED THROUGH FLEXIBLE BAR ELEMENTS, COMBINING WITH ELEMENTS OF RIND FOR THE STRUCTURE OF THE ARMCHAIR AND ITS SETTINGS, WITH THE OBJECTIVE OF NOT MISSING THE ESSENTIAL ASPECTS OF THE PROBLEM, ALLOWING THE SOLUTION WITH A REDUCED COMPUTATIONAL TIME. THE NUMERICAL MODEL OF BODYWORK/SEAT IS PRESENTED WITH ITS VALIDATION, ACCORDING TO THE DECELERATION CURVE ESTABLISHED BY REGULATION 80 AND IS IMPACTED TO A RIGID WALL AT A SPEED OF 32 KM/H, WHERE YOU GET VON MISES STRESS IN ELEMENTS THAT COMPOSE THE STRUCTURE OF THE SEAT IN BODYWORK. IT IS ALSO SUBMITTED A PROPOSAL TO AMEND THE ATTACHMENT OF THE STRUCTURE OF THE SEAT, COMPARING THE RESULTS OF THE STRESS GOTTEN IN THE TWO SUBMITTED SITUATIONS TO THE FRONTAL IMPACT.