도시철도차량의 치수최적설계 및 구조체 형태에 따른 경량화 연구

초록

In this paper, we discussed the weight reduction rate of the urban transit according to the size optimization and various structural shapes, in particular, for the Korean EMU car body made by aluminum extrusion profiles. First, the thicknesses of the carbody were optimized by a size optimization process and the weight of the Korean EMU carbody was reduced to about 18%. Second, the under-frame was substituted with the frame type structure or the composite sandwich structure. The weight of the Korean EMU car body was reduced to about 11.0 % or 28.7% for each case. The FE simulation results of two models met the Performance Test Standard for Electrical Multiple Unit, stipulated by Ministry of Construction & Transportation.