Development of simplified safety assessment procedure for paratransit buses
J. W. Wekezer
AbstractThis paper describes development of a simplified pr
ocedure for the safety assessment of paratransit bu
ses. The principal concept of
the bus crashworthiness evaluation is adopted from
the United Nations (UN), and ECE Regulation 66 .
The main objective of
this study is to replace expensive and impractical
full scale tests with a series of simple and well d
efined experiments on structural
components. The research methodology utilized for d
evelopment of a new procedure is based on two track
s of parallel research
activities. The first research track consists of ex
perimental tests conducted on three conceptual leve
ls: material characterization, component testing, and full scale tests. The second track contains virtual testing representing the experiments. The virtual tests are performed using the nonlinear explicit dynamic code LS-DYNA® and well developed, verified and validate d Finite Element models.
The numerical results are used for extensive parame
tric studies and “what if” investigations. The FE m
odels of the entire bus and its tested components are validated through comparison with the experimental data derived from several laboratory tests of the bus connections.
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