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Development of an Open-Typed Optimal Trolley Model for Cable-Based Retractable Membrane Roof

케이블 기반 개폐 막 지붕의 오픈형 최적 트롤리 모델 개발

  • Lee, Donwoo (Industrial Design and Architectural Engineering, Koreatech University) ;
  • Shon, Sudeok (Industrial Design and Architectural Engineering, Koreatech University) ;
  • Choi, Bongyoung (Interdisciplinary Program in Creative Engineering, Koreatech University) ;
  • Lee, Seungjae (Industrial Design and Architectural Engineering, Koreatech University)
  • 이돈우 (한국기술교육대학교 디자인.건축공학부) ;
  • 손수덕 (한국기술교육대학교 디자인.건축공학부) ;
  • 최봉영 (한국기술교육대학교 창의융합공학협동과정) ;
  • 이승재 (한국기술교육대학교 디자인.건축공학부)
  • Received : 2020.11.26
  • Accepted : 2021.01.08
  • Published : 2021.01.31

Abstract

In the field of architecture, retractable devices capable of responding flexibly to the environment have been applied widely to large structures. Among these devices, the aesthetically pleasing retractable membrane is lightweight so that the membrane can be opened easily using only a traction device. On the other hand, because the towed membrane moves as it is connected to the main cable by a trolley, the number of trolleys needed increases in proportion to the roof's area. This study proposes an optimal model for an open-type trolley (OTT), which is used widely in these devices, using topology optimization. The analysis used the ANSYS program. A new model was proposed based on the results and reviewed through the feedback. Through this process, it was possible to develop a prototype with increased durability and reduced weight. For OTT, optimization was performed based on static analysis and the boundary conditions, so three prototypes were designed. A comparison of the proposed trolley with the conventional one under the same conditions revealed an up to 71.04% decrease in volume while the yield-strength reached 8.67 to 11.43%. In conclusion, the optimal trolley proposed was found to be reliable in terms of economy and stability.

건축 분야는 최근 기계·로봇 분야와 접목하여 환경에 유동적으로 대응할 수 있는 개폐식 장치를 경기장과 같은 대공간 구조물의 지붕에 많이 적용하고 있다. 이러한 장치 중에서 외관이 수려한 개폐 막은 경량이어서 경계부의 견인 장치만으로 막을 쉽게 개폐할 수 있다. 그러나 막은 주 케이블에 트롤리로 연결되어 이동하므로 지붕의 면적에 비례해 트롤리 개수가 늘어난다. 본 연구에서는 이러한 막의 개폐 장치에 많이 사용되는 오픈형 트롤리를 위상 최적 기법을 이용하여 모델을 제안한다. 해석은 ANSYS 프로그램을 사용하였고, 결과를 바탕으로 피드백 과정을 통해서 새로운 모델을 제안하고, 검토하였다. 이 과정에서 트롤리 중량은 줄고, 내구성이 높아진 원형을 개발할 수 있었다. 오픈형 트롤리는 정적 해석 결과와 이에 대한 경계조건을 바탕으로 위상 최적화를 수행하며, 세 가지 타입의 최적 트롤리 원형을 설계하였다. 제안된 트롤리는 기본형 트롤리와 같은 조건에서 비교한 결과, 최대 71.04%의 부피를 감소시켰고, 항복강도는 8.67~11.43%에 달하였다. 결론적으로 본 연구에서 제안된 최적화 트롤리 모델은 경제성과 안정성을 신뢰할 만하였다.

Keywords

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