가드레일의 충돌에 대한 방호성능 평가

In this study, guardrail performance was investigated by impact analysis. The analysis of guardrail was conducted by LS-DYNA. HYPER-MESH was used as pre-processor. Guardrail that is SB4 grade consist of rail, damper and post. 3D modeling of Guardrail was carried out by CATIA. The finite element model of vehicle was provided from NCAC. The analysis conditions were chosen from Regulation of Ministry of land Infrastructure and Transport. When crushing with vehicle, the max displacement of guardrail was 206 ㎜ and max acceleration of vehicle was 13.8 g. These results of analysis satisfied Regulation of Ministry of Land Infrastructure and Transport.