130 km/h의 소형차 충돌속도와 272 kJ의 고 충돌에너지를 만족시키는 반강성 방호울타리의 개발

다국어 초록 (Multilingual Abstract)

A semi-rigid barrier, which was designed to resist a high impact severity of 272 kJ (13-ton bus-90 km/h-15°), was improved to ensure the occupant safety of a small car impact of 0.9-ton small car-130 km/h-20° by performing extensive finite element analyses (FEAs). To meet the occupant safety requirements of the small car impact, the gradient of small car lateral velocity-time history curve for the semi-rigid barrier designed to resist the high impact severity should be adjusted such that it was increased during the initial stage of impact and decreased before the occurrence of THIV. The semi-rigid barrier employing asymmetric slip block-outs with a length of 25 cm could achieve the intended pattern of the vehicle velocity gradients. And among the semi-rigid barriers using asymmetric slip block-outs the barrier with 3 rails provided better occupant safety compared to the barrier with 2 rails.

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