하이퍼튜브에 적용되는 복합재 대차프레임 제작 구조 안전성 평가 연구

초록

Recently, hypertube systems have been actively studied as next-generation transportation systems due to the increasing demand for eco-friendly and ultra-high-speed transportation. The weight of a hypertube vehicle directly affects energy efficiency, which makes lightweight design of its main structures important. In particular, the bogie frame is a key structure that supports the carbody, superconducting magnets, running wheels, and guide wheels. Therefore, lightweight for bogie frame in railway systems is important. In this study a composite bogie frame for a hypertube system was designed using carbon-fiber-based composites instead of conventional metallic materials. A prototype was fabricated based on the proposed design. Structural analysis was then performed under running and levitation conditions based on EN 13749. The results showed that the Tsai-Wu index of the composite parts was less than 1 in all load cases. The Von-Mises stress of the metallic parts was also lower than the yield strength. These results indicate that the proposed composite bogie frame has sufficient structural integrity under both running and levitation conditions.

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