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송기욱(K.W. Song),유근봉(K.B. You),현중섭(J.S. Hyun),장성호(S.H. Jang),하정수(J.S. Ha) 대한기계학회 2001 대한기계학회 춘추학술대회 Vol.2001 No.8
Main steam pipe in power plants is subjected to service conditions under which creep processes take place limiting the component's lifetime. To ensure a safe and economic operation it is necessary to get accurate information about the lifetime situation of single components as well as of the whole system. Careful evaluation is combined with FEM analysis, NDT, microstructure evaluation. Especially, 14MoV63 steel is used as material for main steam pipe for 30 years old power plants. In service inspections have shown an increasing number of cracks and and creep cavities beside stress concentration parts. A detailed analysis came to the conclusion that lifetime has been consumed to a high degree, 80%level.
인천국제공항에서의 운항을 통해서 살펴본 안개예측의 중요성
임헌호,김동혁,송기욱,Leem, H.H.,Kim, D.H.,Song, K.W. 한국항공운항학회 2005 한국항공운항학회지 Vol.13 No.4
According to the aviational definition, the fog is an obscuration phenomenon when prevailing visibility becomes less than 1,000m. Fog defined above causes so many aviation traffic problems like detour, flight delay and cancel. Therefore this study investigated quantitatively the fog effects on flight operation using flight delay and cancel statistic data during last four years from 1st Jul. 2001 to 30th Jun. 2005 at the Incheon Int'l Airport. The results of this study show that the hazardous meteorological condition is a important cause of flight delay and cancel, especially fog phenomenon. And it is expected that the results of this study give us the necessary and importance of fog prediction at the Incheon Int'l Airport.