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구정서(Koo Jeong-Seo),한형석(Han Hyung-Seok),송달호(Song Dhal Ho) 한국철도학회 2001 한국철도학회 학술발표대회논문집 Vol.- No.-
In this study, the carbody design of the rubber tired AGT(Automated Guide-way Transit System) under development by KRRI was numerically analysed to evaluate its structural strength according to the standard specifications for Korean LRT (Light Rail Transit). The numerical results showed that the detail design of the carbody was strong enough to satisfy the specifications with respect to the axial compression strength, the vertical strength and the vertical stiffness/natural frequency). However, the carbody design had some problems on the fatigue strength by twist loadings. So, it was recommended that the carbody design should be modified to improve the twisting strength by reinforcing the front end structures.
철도안전법 시행지침 16조의 충격가속도 평가를 위한 객차의 데이터 필터링 연구
조현직(Cho Hyun-Jik),김운곤(Kim Woon-Gon),구정서(Koo Jeong-Seo),송달호(Song Dhal-Ho) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
In the article 16 of the domestic rolling stock crashworthiness regulations, the collision acceleration level during collision accidents should remain under the maximum 7.5g and the average 5g. By the way, the accelerations obtained in crash simulations and tests contain many kinds of high frequency components due to numerical oscillations or noisy signals. So, this paper aims to develop reliable post-processing methods to filter high frequency oscillations and extract the rigid body motions of passenger rail cars. For this study we used the 1-dimensional dynamic model of KHST (Korean high-speed train), and evaluated acceleration data at the driver"s area in the first power car and the passenger area in the following trailer.