서브모델링 기법을 이용한 철도차량 복합재 대차프레임의 금속재 체결부 볼트 위치 최적화 연구

초록

This paper described the optimal design of bolt location for metal joints of railway bogie frame made of glass fiber/epoxy 4-harness satin woven laminate composite and PVC foam core. The optimal design was done by sub-problem method using Ansys Parameter Design Language(APDL). And the sub-modeling method was applied to conduct the derailed analysis for the only target part and reduce calculating time. The structural analysis for composite bogie frame was performed according to JIS E 4207. The results showed that the optimal analysis using sub-modeling method had benefit to obtain results more rapidly and precisely than the entire model, and the maximum Von-Mises stress due to the optimal design of bolt location has reduced in comparison with its original dimensions.