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강승구(Seung-Gu Kang),신광복(Kwang-Bok Shin),임재문(Jae-Moon Im),박정준(Jung-Joon Park),전승기(Seung-Gie Jeon) 한국생산제조학회 2017 한국생산제조학회지 Vol.26 No.4
This study evaluated the design and structural integrity of a three-axle bogie frame in a railway freight car through a numerical analysis and an experimental evaluation. A three-axle bogie frame, which supports the weight of the car body and load, is required to transport heavier cargo because two-axle vehicles have structural limitations. Therefore, this study performed a structural analysis and static load tests to evaluate the design and structural integrity of a three-axle bogie frame. The results obtained from the numerical analysis were compared to those of the experiments. For the bogie frame used in the experiments, a failure evaluation was performed using non-destructive methods. The numerical analysis and experimental evaluation were satisfactory for the structural integrity evaluation.
한환수(Han Hwan-Su),전승기(Jeon Seung-Gie),박태영(Park Tae-Young),김봉상(Kim Bong-Sang),박덕신(Park Duck-Shin),권순박(Kwon Soon-Bark) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
An amenity requirement of the passenger using public traffic is rising continuously, and also The Ministry of Environment established "Indoor air quality management guidelines in public facilities(Dec. 2006)". To satisfy such requirement, the photoplasma device to decrease VOCs(Volatile Organic Compounds) and suspended bacillus is applied to the underframe mounted HVAC(Heating, Ventilating and Air-Conditioning) system for train. Air purifying method of photoplasma device is optical and chemical reaction that UV-light(wavelength less than 280nm) react with catalyst material(TiO2). To analyze the efficiency of photoplasma in this study, we measured the requirement time for toluene to decease down to 0.3ppm after contaminating the passenger cabin for train to toluene 1ppm.
Experimental Research on Running Stability of Swing Motion Bogie System for a Freight Car
최정환(Jeong Hwan Choi),지해영(Hae Young Ji),박진규(Jin Kyu Park),전승기(Seung Gie Jeon) Korean Society for Precision Engineering 2020 한국정밀공학회지 Vol.37 No.5
The swing motion bogie system for a freight car is more effective regarding the vibration damping effect than other freight car bogie systems while operating, and it is a bogie system that can travel up to 120 km/h despite being a freight car. Imported in 2006 in Korea and operated for more than 10 years in the domestic railway environment, the performance and maintenance efficiency have been proven compared to the existing welding bogies. As a result, the domestic demand will continue increasing in the future, but it is now dependent on overseas imports. In the long term, it is expected to cause problems such as loss of foreign currency and delay in procurement during maintenance. For this reason, development of the localization of the swing motion bogie system is underway, and it requires accurate performance analysis and validation of operating behavior characteristics because the bogie system is one of the main devices of the railway vehicles. Thus, in this study, we could confirm the suitability of the swing motion bogie system in the domestic operating environment based on the analysis of the operating behavior characteristics, the validation at the laboratory environment, and the operating test on the track.