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설계요구조건 검증을 통한 한국형 고속 틸팅열차(TTX)의 차체 재료 선정에 관한 연구
신광복,구동회,한성호,박기진 한국철도학회 2004 한국철도학회논문집 Vol.7 No.2
In order to determine the most suitable material system for achieving the lightweight design while fulfilling the design requirements of carbody structures of Korean Tilting Train eXpress(TTX), aluminum carbody, composite carbody, and hybrid carbody combined with aluminum and composite structures were considered in the present study. The finite-element analysis was used to verify the design requirements of the TTX carbody structures with the material system considered in the design stages. The stresses in the carbody structures and deflections of underframe against static load cases were used as design criteria. The results show that the hybrid carbody structures are beneficial with regard to weight savings and structural integrity in comparison to aluminum and composite carbody structures.
신광복,이상진 한국복합재료학회 2004 Composites research Vol.17 No.4
철도차량에서 복합재료에 대한 활용은 날로 증대되고 있는 추세이다. 현저한 기술적 진보를 얻기 위해 철도차량은 더 가볍고, 강하고, 안전하며 전통적인 소재와는 차별화된 소재를 요구하고 있다. 복합재료의 철도차량에의 응용은 무게 감소, 이로 인한 속도 증가, 에너지 소비량 감소, 낮은 관성, 적은 트랙 마모 그리고 큰 유효 탑재량 등의 장점을 지니고 있으며 철도차량 디자인에 여러 다양함을 제공하고 낮은 무게 중심 설계에 의한 안전성 확보, 단순화된 구조 설계에 의한 좌석수의 증가 등의 장점을 지니고 있다. 또한, 모듈화 설계를 가능케 함으로서 제작공정의 감소 및 유지보수 효율화를 얻을 수 있게 된다. (중략)
신광복,경우민,홍창선,Sin, Gwang-Bok,Gyeong, U-Min,Hong, Chang-Seon 대한기계학회 1996 大韓機械學會論文集A Vol.20 No.6
The disk/blade assembly of a turbine engine is made in the shape of a dovetail type or a fir-tree type. Since disk fillet regions or contact surfaces undergo high stress comcentration, fatigue cracks frequentrly occur in the disk/blade assembly. Therefore, it is necessary to analyze the stress distributions in the fir-tree type disk/balde assembly and predict the region of fatigue failure. The stress distributions of the disk/blade assembly were investigated by using the photoelastic method and the finite element method. Two dimensional photoelastic techniques were used to investigate the stress distributions of contact surfaces and fillet regions. TH stress distributions were obtained by the shear-difference method and were compared to the finite element results. It was found that maximum tensile stresses were higher in the fillet region thatn in the contact surfaces of the fir-tree models. The finite element results showed good agreement with the experimental results.