중심합성계획법을 이용한 보행자 HIC 영향에 대한 연구
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Since the regulation for pedestrian protection was announced in Europe, both the passive and active systems for pedestrian protection have been investigated in motor industries and they are still continuing. Especially, the regulations of fatal head injury that could cause a pedestrian death were commonly included in the Euro Phase I, Ⅱ, and GTR(global technical regulation). Also these regulations are expected to be getting stricter. Generally, a hood-lifting system is well-known for typical active system that is related with a head injury. It was proved that the vehicle with this hood-lifting system causes massive HIC(head injury criterion) reduction comparing to one without the hood-lifting system. However, more advanced researches are still required on these active systems because the advanced researches could increase the stability and reduce the cost at the same time. On the other hand, although this passive system, which is related to its structure and material, shows relatively less HIC reduction, this system still preferred because of its strong stability and low-cost. In order to apply the passive design to the pipeline immediately, a simple design change method of the passive hood system was considered in this study. This study analyses the effect of the hood inner and hood outer with respect to pedestrian protection. The test condition was EuroNcap regulation. Then, the RSM(Response Surface method) was applied to optimization problem, and find the optimal thickness. In this study, it is the relationship between hood thickness and HIC (head injury criteria) for child headform-to-hood impact by investigating the analysis result.