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평면 플레이트 형상을 가진 탈선계수 측정용 윤축의 구조해석
함영삼(Y. S. Ham),오택열(T. Y. Oh) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
Since a derailment of rolling stocks results in huge losses in properties and lives, the measurement of a derailment coefficient is a very important test item to estimate the running safety of rolling stocks. For a measurement of the derailment measurement of forces between the wheel and rail a measuring wheel-set should be made first. The process to make a measuring wheel-set has some stages for correct measurement. They are as follows; a finite element analysis of a wheel to find a position of holes at which vertical force shall be measured, a finite element analysis for the position of strain gauges.
함영삼(Young Sam Ham) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
Locomotives of railway, diesel locomotives and electric locomotives can be divided into. The nation’s railway electrification as environmental issues such as noise and air pollution issue is being steadily made . They are led to the industrialization of our country until now enhanced traction electric locomotives replaced by diesel locomotives. When compared to electric locomotives until now loaded in the domestic and the new electric locomotives, several changes were Increase the traction of the existing 5,200 ㎾ to 6,600 ㎾. Improved adhesion increased by 88 to 132 tons, the weight of the vehicle. The type of balance, Bo-Bo-Bo type Co-Co type was changed. In this paper, the results of evaluating the responsiveness curve of electric locomotives to be the first station in the country and driving safety technology to ensure the safety of the railway.
함영삼(Ham Young-Sam),서정원(Seo Jung-Won),이동형(Lee Dong-Hyong),전웅식(Jeon Eung-Sik) 한국철도학회 2003 한국철도학회 학술발표대회논문집 Vol.- No.-
Among welded structure bogies in use for high speed freight car, a part of bogies manufactured in 1999 and 2000 have found problems that failure occurs in its end beam. In case of a freight car a difference of weight between empty and loading conditions are worse than in case of a passenger car. Moreover its brake system is tread brake without second suspension system. A failure of end beam is supposed to be due to loading by brake rather than vertical loading by freight. This failure can make brake system useless and may be a cause of derailment in the worst case. In this study, in order to be proved the cause of failure and to solve the problem it is described that we have measured load history acted on end beam and set up the procedures.
경부고속철도 2단계 구간에서 KTX 차량의 진동특성에 관한 연구
함영삼(Young-Sam Ham),문경호(Kyeong-Ho Moon),이찬우(Chan-Woo Lee),서정원(Jung-Won Seo) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
Executed interface verification test between vehicle and track using KTX vehicles in Seoul-Busan high-speed railway second-stage rail track section. When train passes test section at the 300 km/h speed, measured lateral vibration acceleration of bogie and car body and vertical vibration acceleration of car body. Vibration acceleration measured with speed and distance. Sampling frequency does more than 200 ㎐, and extracts Zero to Peak maximum value in probability distribution 0.15~99.85 % wide-band and did filtering. Test result, all vibration accelerations was expose by acceptable level limit within at test procedures.