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Journal of the Korean Society of Hazard Mitigation 2013;13(3):123-130.
Published online June 30, 2013.
Water gel의 밀도 및 두께변화에 따른 폭발압력의 저감
정우진
Mitigation of Blast Pressure according to the Variation of Density and Thickness of the Water Gel
Woo-Jin Jung, Hiroshi Nagai
Abstract
The test blast was carried out in order to investigate the mitigation effect of blast pressure by the water gel for a barrier material at close range from TNT explosive. The mitigation effects of the blast pressure by changing the density and thickness of the water gel were verified. At close range from TNT explosive, as the low scaled distance, the mitigation effect of the peak overpressure by water gel was greater than that of the high scaled distance, and decreased with increasing the scaled distance. Furthermore, the mitigation degree of the scaled impulse by changing the density and thickness of water gel showed the same trend as the peak overpressure.
Key Words: water gel; blast pressure; TNT explosive; mitigation effect
요지
TNT폭약 근거리에서의 완충재에 의한 직접적인 폭풍압 저감 효과에 대해서 실험적으로 조사하였다. 완충재로서 water gel을 사용하였으며, 완충재의 밀도 및 두께를 달리하여 폭풍압 저감 효과를 확인하였다. 폭원 근거리에서는 완충재에 의한 피크 과압의 저감 효과가 크며 환산거리가 증가함에 따라 저감 효과가 감소하였다. 또한 완충재의 밀도 및 두께변화에 따른 환산충격량의 저감 정도는 피크 과압의 저감 정도와 동일한 경향이 나타났다.
핵심용어: 폭발압력; TNT폭약; 저감효과


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