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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.
터널주행시의 고속전철 차체 피로신뢰성 평가에 관한 연구
박춘수(Park Choon-Soo),서승일(Seo Sung-Il),이태형(Lee Tae-Hyung),목진용(Mok Jin-Yong) 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. When high speed train passing though tunnels, the pressure wave is generated in tunnels and pressure variation by the wave is acting on carbody structure with dynamic load repeatedly. In this study, formulation for reliability based fatigue assessment method has been performed when the high speed train passes through tunnels. The formulation was based on structural reliability index method and followed the proposed ISO method. The result by this study would be a good guidance to calculate the fatigue life and reliability index of body structure.
박춘수(Choon Soo Park) 대한공업교육학회 1984 대한공업교육학회지 Vol.9 No.1
When five kinds of samples were treated with three kinds of stabilized materials in this study, a interrelationship between soil structure and engineering property was studied through physical and chemical experiment, reaction experiment, dynamic experiment and experiment of x-ray diffractive analysis. Analysis of forming mineral, generative mineral and mineral figure from a slight variation of nature and state in a structure of stabilizing treated soils were confirmed as well as forming variation of a new generative mineral under reaction course, of which a new generative mineral has an effect on a change of intensity in stabilizing treated soils was analyzed on a fixed property and a fixed quantity property, and accompanying characteristic was also considered through the experiment of x-ray diffractive analysis.
한국형 고속전철 개발열차의 차량별 속도에 따른 실내 소음 특성 분석
박춘수(Park Choon-Soo),김기환(Kim Ki-Hwan),서승일(Seo Sung-Il),이태형(Lee The-hyung),박찬경(Park Chang-Kyung) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
In order to develop a high speed train, various conditions have been considered. Internal noise level of cabins is an important one. In this study, The specification of the interior noise level for KHST(Korean High Speed Train) has been adopted the same level of KTX-spec. In this paper, the interior noise levels of KHST are measured and analysed through the speed and other conditions. According to the speed, the level of internal noise(driver"s room(PC2), motorized trailer(TM1) and trailer car(TT2)) is compared. The results of measuring data show that the interior noise levels of KHST are good. And noise levels of this paper are useful in the decision of noise specification.
한국형 고속열차의 최고속도에서 압력변동 하중과 실내소음 특성 분석
박춘수(Park Choon-Soo),최성훈(Choi Sung-hoon),이태형(Lee The-hyung),목진용(Mok Jin-young),김기환(Kim Ki-Hwan) 한국철도학회 2005 한국철도학회 학술발표대회논문집 Vol.- No.-
The Korean high speed train(KHST), developed since 1996, is presently undergoing commissioning tests on the high-speed track as well as on the conventional track since 2002. The purpose of the commissioning test is twofold: first to verify the performance of the train-set and equipments, and to demonstrate system reliability. Last December, KHST has reached the maximum speed of 350㎞/h and a number of data proving the performance of the train has been acquired. Among the data noise level and pressure variation in a cabin are important factors effecting passenger"s comfort. Discussed in this paper are interior noise and pressure variation when the train passes tunnels during the 350㎞/h test.
박태근(Park Tae-Keun),박춘수(Park Choon-Soo),서승일(Seo Sung-Il) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
Railway is huge traffic system which is operated organically combining all the elements;vehicle, track, electric power, signal/communication, operation, etc. Safety level has ben improved steadily by learning lessons from past accident. But with rapid progress in high-speed, massive, high-frequency transit fresh idea of accident prevention is now in order. In quest of effective and efficient countermeasure, we aim to establish an adequate safety evaluation/management method. Our proposals are basic concept relating to safety analysis of fatal accidents, AHP of Saaty, Fuzzy AHP.