Abstract
Abstract Nowadays, safety is a competitive advantage for automotive products and therefore receives considerable attention by automotive research centers. In this paper, a frontal crash test of sedan product of an under development platform is simulated and occupant head injuries are investigated based on ECE R94 regulation. First, an initial evaluation of the crash behavior of the sedan car is carried out and then airbag, dummy and seat belt are added to the model to study occupant head injuries under crash test. In this study, peak head acceleration and head injury criteria (HIC36) are considered as two output parameters based on ECE R94 regulation. Considering these two output parameters, sensitivity analysis and optimization are performed using Taguchi and analysis of variance (ANOVA) methods. In this way, airbag distance to dummy, trigger time, initial inflator gas temperature and tank pressure are considered as input parameters. Obtained results show that in all computer experiments designed by Taguchi responses values satisfy the requirements of ECE R94. Two different out-of-position conditions are considered by reducing the distance between dummy and airbag relative to the optimum design obtained by Taguchi. The worst case of design and its response values are also predicted using Taguchi. Finally, re-evaluating finite element analyses are performed based on the optimum and the worst cases. The results of these simulations show the validity of approach of this paper.
Highlights
Nowadays, safety is one of the most important attributes that affects the market of automotive products
An automotive frontal impact was simulated and occupant head injury investigated based on ECE R94 regulation
Taguchi and analysis of variance (ANOVA) were used for sensitivity analysis and optimization process
Summary
Safety is one of the most important attributes that affects the market of automotive products. Many researches have been carried out by automakers to improve the safety of their products. To provide more occupant protection, safety regulations developed for automobiles are getting stricter day by day. Vehicle safety in European Union countries is regulated mainly by international standards and regulation devised by the European Union (EU) and the United Nations Economic Commission for Europe (UN-ECE). The ECE regulations are used in many other countries like Asian countries. ECE R94 is one of the well-known regulations which is used for frontal crash evaluation test (United Nations Economic Commission for Europe, 1998)
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