Impact Strength Analysis on Passenger Seat during Crash by Using Hyper Works

Abstract

Automobiles are main transport medium in the present days, buses plays a major role in public transport. Bus cabin has so many components among them seats are most important one.Under Federal Motor Vehicle Safety Standards (FMVSS) 210, 207, 222 and 225; automotive and bus seats are tested under extreme conditions to ensure that the seat will not fail and cause human injury. Besides the requirement that the seat not be torn from the floor of the vehicle during a crash (FMVSS 210), the seat must also not be too rigid, or that is to say, we want the seat to act as an energy absorber during a collision (FMVSS 222). Lastly, new bus seats must also be able to support the head impact, knee impact, horizontal bar from front side impact and horizontal bar from reward side impact. To do this kind of different impact tests FEA tool is required. Altair Radioss is highly non-linear solver to do impact tests, before this step we need cad model, after that pre-processing is needed and apply the present running Steel Material to the bus seat frame and check the results. For this thesis the standard FMVSS 222 is selected and the analysis is carried out. Depends on the analysis results the design changes are made using CATIA software, Hypermesh is for meshing the seat frame and solved using Radioss. For post processing Altair Hyperview is used.