• 한국산학기술학회논문지
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• 제22권1호
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• pp.305-312
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• 2021

본 연구는 미세조직 분석을 통한 잠수함 탈출 트렁크 해치 스프링 파손부 개선에 관한 내용으로 잠수함 건조 중 발생한 탈출 트렁크 파손에 대한 발생원인 및 개선방안에 대해서 검토 하였다. 탈출 트렁크 스프링 파괴에 대한 원인 규명을 위해서 파손된 제품에서 시편을 채취하여 형광분석기를 이용한 재질의 화학성분을 비교 분석 하였고, 기계적 특성 변화를 검토하기 위해 파손부 주위로 비커스 경도를 측정 하였다. 특히, 스프링 파손부는 광학현미경 및 주사전자현미경을 이용하여 파면을 심층적으로 관찰하여 균열의 시작점 및 전파 경로를 확인하여 파괴에 대한 원인을 규명하고자 하였다. 최종적으로는 스프링 파손 원인 규명을 통한 스프링 형상 설계 방안을 제시하였고, 추가적으로 내부식성 및 내마모성이 우수한 나일론 도장을 도포하여 신규로 개선된 스프링을 제작 하였다. 실제 건조중인 잠수함 트렁크 해치에 부착하여 시험한 결과 기존 제품에 비해 해치 여닫음 시 스프링 간 접촉에 의한 도장 벗겨짐 현상이 감소하여 개선의 효과를 확인 하였다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2013년도 춘계학술대회
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• pp.445-446
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• 2013

SOLAS II-2/13.4에 의해 기관구역에서의 탈출설비는 두 개의 강재 사다리가 요구되는데 하나는 비상탈출 트렁크(Escape Trunk)에 위치해야 한다. 하지만 트렁크의 규정상 내부치수가 사다리 및 비상조명을 포함한 사이즈인지 명확한 해석이 없다. 이 연구에서는 기관구역 탈출설비의 내부치수의 합리적인 적용에 대한 제안을 한다.

• 한국응급구조학회지
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• 제19권3호
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• pp.19-32
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• 2015

Purpose: This study examined the effect of wearing personal protective equipment (PPE) on cardiopulmonary resuscitation (CPR), positive airway pressure, and the posture of emergency medical technicians (EMTs) when conducting CPR. Methods: Twenty 119 EMTs performed 30:2 CPR on a manikin for 4 min. Imaging data were digitized with Kwon3D XP (version 4.0). Data were collected by analyzing the motion when starting in one cycle, such as pressing to the maximum and in the final position (relaxed), and were analyzed with SPSS 18.0. Results: The angle of the elbow joints was significantly reduced (p < .05). The trunk angle was statistically significantly (p < .01, p < .001) increased. The angular velocities of the shoulder joint and left elbow joint were reduced (p > .05). The angular velocity of the trunk was significantly reduced in the starting and maximum compression postures. The hand-escape time was increased. The average compression depth was increased but not significantly (p > .05). The positive airway pressure was reduced (p > .05). Conclusion: The angle of the elbow joints and the angular velocity of the trunk were reduced, and the angle of the trunk was increased. The success of CPR and positive airway pressure was reduced.

• 한국안전학회지
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• 제30권5호
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• pp.74-79
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• 2015

The purpose of this study is to find out its effect on changes in the joint angle and the success rate of cardiopulmonary resuscitation by conducting cardiopulmonary resuscitation (CPR) when wearing and not wearing PPE (personal protective equipment) targeting 20 paramedics with more than 5 years of experience. The subjects carried out CPR in 30:2 for 4 minutes and collected images were digitized by Kwon3D XP Software Package(Version 4.0) and then data were obtained. Data, which were collected by analyzing the motion when starting in one cycle, when pressing to the maximum, in the final position (relaxed), were analyzed by using SPSS 18.0. In conclusion, during CPR, the angle of the both shoulder joints was not significant (p>.05) and the angle of the right elbow joint was reduced in all positions and was statistically significant (p<.05) and the angle of the left was significantly reduced in the maximum pressure posture and the final position (p>.05). In the case of the trunk, the angle increased statistically significantly at all stages (p<.01, p<.001). Also, during CPR, the average compression rate was significantly reduced after wearing PPE (p<.05) and average hand escape time by cycle increased statistically significantly (p<.05) but chest compression execution rate at the correct depth did not show any significant difference between the two groups (p>05).