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손승완(Seungwan Son),정현승(Hyunsung Jung),한순우(Sunwoo Han),김진성(Jinsung Kim),권태수(Taesoo Kwon) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
Railway axle is one of the most important components of railway system. It has been reported that the lightweight design of railway axle and wheel(unsprung mass) achieve fine noise and vibration performance and increase energy efficiency. Hollow axle design of railway axle is one of the effective method for weight reduction. However, existing hollow railway axles have same bore diameter over the whole axial position. The purpose of present study is to establish and evaluate the new design method of railway hollow axle which can be modified bore diameter at each axial position. To evaluate the light railway axle, Finite Element Method(FEM) was applied according to European Norm(EN). Consequently, 25% light model of railway axle was developed.
손승완(Seungwan Son),정현승(Hyunsung Jung),한순우(Sunwoo Han),김진성(Jinsung Kim),권태수(Taesoo Kwon) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
Lightweight railway axle provides not only reducing weight of vehicle but also smaller unsprung mass. It has been demonstrated that low unsprung mass achieve enhanced noise and vibration performance of railway vehicle. The purpose of present study, as a part of lightweight axle design research, was to determine the inner diameter of railway hollow axle. The axle design method of EN standard was used for Finite Element Analysis, and the axle of Korean standard Electric Multiple Unit(K-EMU) was applied for that of model. Consequently, it was estimated that approximately 20% of axle mass could be reduced with hollow axle design.
철도차량용 사각관 충돌에너지 흡수부재 경량화 설계를 위한 기초연구
손승완(Seung-wan Son),정현승(Hyun-seung Jung),김진성(Jin-sung Kim),권태수(Tae-soo Kwon) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
The square tube type energy absorber is normally installed in front of front cab or behind a coupler. And its main function is absorbing kinetic energy by converting into plastic strain energy to protect passenger from train accident. This study is the primary study of square tube lightweight design by utilization of lightweight material and shape of initiator. The alternative idea of lightweight square tube type energy absorber was suggested. Furthermore FEA(Finite Element Analysis) was performed by applying LS-DYNA/Explicit commercial FE code.
손승완(Seung-wan Son),정현승(Hyun-seung Jung),권태수(Tae-soo Kwon),김진성(Jin-sung Kim) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
The main purpose of EMU(Electric Multiple Unit) operation is to transport mass number of person rapidly and safely. Moreover, in the side of operation company, energy efficiency and safety guarantee are main topics of discussion. The purpose of this study is to optimize underframe of EMU by using commercial optimization program(OPTISTRUCT). Design variables are thicknesses of underframe parts, and ojective function is the volume of underframe.