위상최적화를 이용한 철도 차량 전두부 Protective shell frame의 구조 개념 설계에 관한 연구

초록

The leading-cab(high energy absorption area) of rolling stock directly is impacted on the frontal crash unlike other cabs. Thus, leading-cab has a structurally complex shape to solve getting concentrated loads, and which need to enhance structural performance with achieving the weight reduction of cab. Therefore, in design phase, to find the material arrangement which helps structural capacity be better should be done. This research applies the topology optimization to concept design for protective shell frame on strategy of crush energy absorption. Topology optimization method using density method focuses on structural design, and which yields optimal material arrangement under given loads and boundary conditions. In based on topology optimization result of protective shell frame, this research presents conceptual design of under-frame for combination of drive panel and crash energy absorbing members.