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자동차용 휠 베어링의 Orbital Forming 해석
이승표(Seungpyo Lee),이왕열(Wangyeol Lee),조영걸(Younggeol Cho) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
In this paper, the orbital forming analysis of automotive wheel bearing was performed by finite element method. Commercial software MSC.MARC was used and 2-dimensional axisymmetric element was applied. Deformation, stress, and force direction were calculated and investigated for the design aspect. To verify the reliability of this study, experiment was carried out and compared with analysis results. The experiment results showed good agreement with the analysis results.
재료 불확실성을 고려한 풍력터빈용 복합재료 블레이드의 신뢰성 기반 최적설계
이승표(Seungpyo Lee) 한국신재생에너지학회 2017 신재생에너지 Vol.13 No.3
Wind energy has attracted increasing interest because of the need to develop alternative energy sources as a result of the depletion of fossil fuels and the need to develop clean, environmentally friendly energy sources by serious environmental problems such as CO₂. In this study, reliability-based design optimization considering the material uncertainty of composite wind turbine was investigated. For this purpose, structural analysis of the composite blade was performed. Deterministic design optimization was performed that was followed by reliability-based design optimization. From the structural analysis results, the maximum deflection and safety factor were calculated to evaluate the structural safety of the composite material. For optimization, the design variables were selected as the ply angles of the blade and the objective function was selected as the safety factor. The reliability-based design optimization takes into account the uncertainty of the material, i.e., physical properties and volume fraction of the fibers and matrix. Finally, the results of deterministic optimization and reliability based optimization were compared.