한국가스학회지 (Journal of the Korean Institute of Gas)
- 제26권5호
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- Pages.58-65
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- 2022
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- 1226-8402(pISSN)
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- 2713-6922(eISSN)
DOI QR Code
LPG 폭발로 인한 건설현장 굴착웅덩이의 구조물 파손 특성에 관한 연구
A Study on the Failure Characteristic of Excavation Puddle by LPG Explosion using AUTODYN
- 김의수 (한국교통대학교 안전공학전공)
- Kim, Eui Soo (Department of Safety Engineering, Korea National University of Transportation)
- 투고 : 2022.10.04
- 심사 : 2022.10.21
- 발행 : 2022.10.31
초록
Gas explosion accidents could cause a catastrophe. we need specialized and systematic accident investigation techniques to shed light on the cause and prevent similar accidents. In this study, we had performed LPG explosion simulation using AUTODYN which is the commercial explosion program and predicted the damage characteristics of the structures by LNG explosive power. In the first step, we could get LPG's physical and chemical explosion properties by calculation using TNT equivalency method. And then, by applying TNT equivalency value about the explosion limit concentration of LPG on the 2D-AUTODYN simulation, we could get the explosion pressure wave profiles (explosion pressure, explosion velocity, etc.). In the last step, we performed LPG explosion simulation by applying to the explosion pressure wave profiles as the input data on the 3D-AUTODYN simulation. As a result, we had performed analyzing of the explosion characteristics of LPG in accordance with concentration through the 3D-AUTODYN simulation in terms of the explosion pressure behavior and structure destruction and damage behavior. The analyses showed that the generated stresses of the structures were lower than the compressive strengths in cases 1(two lane) and 2(four lane), while the generated stress in case 3(six lane) was 8.68e3 kPa, which exceeded the compressive strength of 5.89e3 kPa.