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이스라엘 - 하마스 공격 전술과 북한의 접경지역에 대한 하이브리드전 대비 연구
문계성,권찬주,송애연 한국접경지역통일학회 2023 접경지역통일연구 Vol.7 No.2
This paper examines the recent situation in which Hamas invaded about 20 villages in Israel using combined land-sea-air tactics and kidnapped 240 people, and predicts a similar invasion on the Korean Peninsula in the future. At dawn on October 7, 2023, Hamas fired over 5,000 rockets and used a variety of methods, including aerial infiltration using paragliding, rapid infiltration by destroying barbed wire and retaining walls with mechanized small units, and tunnel infiltration. In addition, Hamas attacked the Israeli command and control center and cut off communications, and Hamas 'terror continued for as little as 6 to 24 hours. Israel, which had the world's best intelligence and anti-invasion warfare system, was helpless. In the future, such complex warfare is a tactic that could appear in the early stages of an all-out war on the Korean Peninsula or as a provocation for negotiations. The main complex warfare aspect is artillery provocation, which allows North Korea's 16,000 long-range artillery pieces to attack the metropolitan area and border areas. At the same time, we will cause maximum disruption by infiltrating AN-2 aircraft, gliders, and paragliding, infiltrating company-level troops through tunnels, destroying command and control centers and communication lines along the Civilian Control Line by small special forces, and entering the metropolitan area by seizing friendly equipment. In conclusion, South Korea must prepare for North Korea's massive artillery bombardment, comprehensive measures against aerial infiltration (paragliding, unmanned aerial vehicles, A/N-2 aircraft), vigilance against tunnel infiltration, and command and control centers and communication networks in response to infiltration by small-scale special operations forces. There are significant implications for protection, the seizure of friendly troops' weapons at the echelon level, and long-distance aerial teamwork to infiltrate and disrupt the vicinity of the metropolitan area, and countermeasures are needed to prepare for this.
격자형 금형에 의한 알루미늄 후판 열간성형에서 치수정도 개선을 위한 잔류응력 제어
손영기(Y. K. Son),이찬주(C .J. Lee),윤종헌(J. H. Yoon),이정환(J. H. Lee),손동환(D. J. Son),권일근(I. G. Gwon),김병민(B. M. Kim) 한국소성가공학회 2012 한국소성가공학회 학술대회 논문집 Vol.2012 No.5
A hot forming of aluminum plate using a grid type die is a forming process to make a shell plate for the production of a spherical LNG tank. This process is characterized by using a grid-type die with an additional air cooling system for reducing the cooling time of the heated plate after hot forming. The thermal residual stress caused by deviation of temperature distribution between inside and outside of aluminum plate influences considerably on the dimensional accuracy of product. Shape of the hot formed aluminum plate is recovered by this unexpected residual stress. Thus, the control of temperature condition in cooling step is very important to improve the dimensional accuracy of hot formed aluminum plate. In this study, the FE-analysis of hot forming with grid type die is performed to evaluate the effects of stress distribution of aluminum plate in cooling sten on the dimensional accuracy of final product.
Al 후판의 곡면성형 시 치수정밀도 향상을 위한 격자 금형 설계
손영기(Y. G. Son),이찬주(C. J. Lee),윤종헌(J. H. Yoon),이정환(J. H. Lee),손동환(D. H. Son),권일근(I. K. Kwon),김병민(B. M. Kim) 한국소성가공학회 2012 한국소성가공학회 학술대회 논문집 Vol.2012 No.5
A hot forming of large thick AI plate using a grid type die is a process to make a shell plate for the production of a spherical LNG tank. This process is characterized by using a grid typed die with an additional air cooling system for reducing the cooling time of the heated plate after hot forming. The purpose of this study is to suggest the design technique of grid typed die for improvement of dimensional accuracy. Grid type die of this study is designed by spline and DA(Displacement adjustment) method to determine the size of grid and curvature of die. Suggested technique is verified by the experiment of spherical forming for Al5083 thick plate.
LNG 탱크용 Al5083 후판의 열간 곡률 성형해석 및 실험
손영기(Y. G. Son),이찬주(C. J. Lee),윤종현(J. H. Yoon),이정환(J. H. Lee),권일근(I. K. Kwon),김병민(B. M. Kim) 한국소성가공학회 2012 한국소성가공학회 학술대회 논문집 Vol.2012 No.5
A hot forming of large thick AI plate using a grid type die is a process to make a shell plate for the production of a spherical LNG tank. This process is characterized byusing a grid typed die with an additional air cooling system for reducing the cooling time of the heated plate after hot forming. The purpose of this study is to suggest the design technique of grid typed die for improvement of dimensional accuracy. Grid type die of this study is designed by spline and DA(Displacement adjustment) method to determine the size of grid and curvature of die. Suggested technique is verified by the experiment of spherical forming for Al5083 thick plate. A hot curvature forming of thick AI plate using a grid type die is a process to make a shell plate for a spherical LNG tank. This process is characterized by using a grid type die with an additional air cooling system for reducing the cooling time of the heated plate after hot forming. The objective of this study is to establish the FE-analysis technique to predict the thermal deformation and temperature change of Al plate. To verify the efficiency of the FE-analysis technique developed in this study, experiment of the hot curvature forming process is conducted for a I 183×790x20t(mm) model. The results showed that the dimension and temperature of the plate in the analysis agrees well with that of the experiment within 1.25mm and 20.08℃ , respectively.
이광휘(K. H. Lee),이정민(J. M. Lee),이찬주(C. J. Lee),류호연(H. Y. Ryu),권성오(S. O. Gwon),하호선(H. S. Ha),김형익(H. I. Kim) 한국소성가공학회 2014 한국소성가공학회 학술대회 논문집 Vol.2014 No.10
Existing core components of wind power generator, various drive components, have been changed and innovated an electric drive system to a hydraulic drive system due to the enlargement of wind turbines. According as the demand for development and production of hydraulic components escalates, the importance of seamless pipe in the hydraulic line for wind power generation has been increased. This study involves formability analysis for pipes of high pressure brake in wind power generation. We evaluate a safety factor for thickness of the pipe by each outer diameter when operating pressure is applied. And, process analyses for tube sinking and plug drawing were conducted respectively in order to apply design parameters. And then, pipe bending analysis was performed for deformation of pipe. This result would be utilized to preliminary data in pipe bending analysis with plastic deformation in future research.