Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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A Study on Optimum Design Analysis of Bolt Locations for Metal Joint Parts of Railway Composite Bogie Frames using Sub-modeling Method

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

  • 김준환 (국립한밭대학교 기계설계공학, 경량구조 및 CAE 실험실) ;
  • 신광복 (국립한밭대학교 기계설계공학) ;
  • 고희영 (국립한밭대학교 기계설계공학, 경량구조 및 CAE 실험실) ;
  • 김정석 (한국철도기술연구원)
  • Published : 2010.12.31
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Abstract

This paper describes the optimum design of bolt locations for metal joint parts of railway bogie frame made of glass fiber/epoxy 4-harness satin woven laminate composite and PVC foam core. The optimum design analysis was done by sub-problem approximation method using Ansys Parameter Design Language(APDL). The sub-modeling method was introduced to conduct the detailed recalculation for the only target parts and reduce calculating time. The structural analysis for composite bogie frame was performed according to JIS E 4207. The results showed that the optimum design analysis using sub-modeling method was able to obtain faster and more precise results than that of the entire model by the control of mesh size for the target parts, and the maximum Von-Mises stress has been reduced in comparison with its original dimensions due to the optimum design of bolt locations.

본 논문은 유리섬유/에폭시 4-매 주자직 적층 복합재와 PVC 폼 코어로 제작된 철도차량용 복합재 대차프레임의 금속재 체결부 볼트 위치 최적화 연구에 대해 서술했다. 최적화 해석은 APDL(Ansys Parameter Design Language)을 이용한 서브모델링 기법을 적용하였으며 부분문제 근사방법에 의한 최적화를 수행하였다. 이때, 최적화 해석에 적용된 서브모델링 기법은 관심영역을 포함한 부분모델에 대한 계산을 재수행 함으로써 해석에 소요되는 시간을 절약하고 상세한 결과를 도출 할 수 있다. 복합재 대차프레임의 구조해석은 JIS E 4207에 의거하여 수행하였다. 서브모델링 기법을 적용한 복합재 대차프레임의 최적화 해석은 전체모델에 대한 결과에 비해 요소망 밀도의 조절을 통한 해석시간 절약과 상세한 결과를 얻을 수 있으며, 또한 볼트위치의 최적화로 인해 보다 낮은 Von-Mises 응력값이 나타남을 확인하였다.

Keywords

Acknowledgement

Grant : 복합소재의 철도차량 적용에 관한 연구

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  1. Effect of the Insert Shape on the Improvement of Durability of Bolted Joints Applied to Composite Bogie Frames vol.38, pp.7, 2014, https://doi.org/10.3795/KSME-A.2014.38.7.765