http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
기존선 터널 주행시의 고속열차 차체가 받는 압력변동 계측 및 분석
이억재(Lee Uk-Jae),박춘수(Park Choon-Soo),서승일(Seo Sung-Il) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
Pressure waves are generated when high speed train runs through the tunnels. These pressure waves not only affect passenger"s health, but also can cause fatigue failures on the vehicle structure. The current high speed train should run on the conventional lines. In this study, pressure fluctuations by the high speed trains such as G7 Korea High Speed Train and Korea Train eXpress are measured in the cabin and the carbody surface when they pass through the tunnels. The measured results are analyzed and the related parameters are investigated.
한국형 고속전철 터널 주행시의 압력 변동 및 빈도의 분석
박춘수(Choon-Soo Park),서승일(Sung-Il Seo),이억재(Uk-Jae Lee),목진용(Jin-Yong Mok),김기환(Ki-Hwan Kim) 한국철도학회 2003 한국철도학회 학술발표대회논문집 Vol.- No.-
In order to develop a high speed train, various conditions have been considered. Fatigue strength assessment by the fluctuation of pressure is an important one. In this study, a numerical simulation has been performed to estimate the fluctuation and frequency of pressure when KHST(Korean High Speed Train)passes through tunnels in the Kyung-Bu high-speed railway. The simulation was based on KHST running the Kyung-Bu high-speed line with the speed of 350㎞/h and the interval of 10 minute headway. And the tunnel entrance speed was estimated by TPS program. Therefore, the fluctuation and frequency of pressure is expressed in Weibull distribution function in the above running situation. The result in this study would be good guidance to calculate the fatigue life and the index of reliability of body structure. We are going to conduct more study to measure the real value of the pressure of the carbody passing through tunnels, to assess the fatigue reliability and to develop method & procedure for the fatigue reliability design.
박춘수(Park Choon-Soo),서승일(Seo Sung-Il),김기환(Kim Ki-Hwan),이억재(Lee Uk-Jae) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
In order to develop a high speed train, various conditions have been considered. Fatigue strength assessment by the fluctuation of pressure is an important one. In this study, the fluctuation and frequency of pressure is measured when KHST(Korean High Speed Train) passes through tunnels in the Kyung-Bu high-speed line. And the characteristics of pressure fluctuation is analysed and formulated. The results of analysis are as follows. The train entering speed and fluctuation value are related. The pressure increasing is generated in proportion to train velocity at leading car. When two train is passing through the tunnel, the pressure value is 1.5~2 times higher than one train is passing. The damping ratio of pressure fluctuation is about 92%. The number of pressure fluctuation in a tunnel is 4 to 6 times. The result in this study would be a good guidance to calculate the fatigue life and the reliability index of body structure.
해양구조물의 S-N 선도 및 파괴역학을 이용한 피로해석연구
曺圭楠,李億宰 홍익대학교 산업기술연구소 2002 産業技術 Vol.12 No.-
In this paper, S-N curve approach and Fracture Mechanics based approach for the fatigue analysis of offshore structure are studied and investigated. Typical tubular joint model of K joint is selected as an example model and the analysis are carried out based on this model. Merits and demerits of two methods are reviewed and S-N curve based method is to be thought as a conservative approach.