언더프레임 두께 최적화에 따른 2층열차의 구조강도비교

Aluminum alloy is very useful material for high speed transportations due to its high strength and light weight characteristics. Especially because of a weight reduction, a large extrusion of aluminum alloy carbody has been manufactured. This aluminum extruded panel is a hollow extruded panel. This shape and thickness is various by designer's sense and experience and VAW's profiles. So it is important to find an optimized shape and thinckness of AEP. In this study we get the AEF's thickness to minimize a weight by applying an optimization algorithm. The results of the study can be used as basic guidelines in designing double-deck trains in the future.