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• W802324914 abstract "본 연구는 풍력발전 시스템에 관련된 IEC61400-1 국제규격 및 GL규격에 정의된 다양한 하중조건을 고려하였고, 이러한 하중들을 효과적으로 견딜 수 있는 특별한 복합재 구조형상을 제안하였다. 복합재 풍력터빈 블레이드 주고에 대한 평가를 위해 유한요소 구조해석을 수행하였다. 구조설꼐에서는 파라미터 분석 연구를 통해 블레이드 구조형상을 결정하였고, 대부분의 주요 설꼐 피라미터를 결정하였다. FEM을 이용한 응력해석결과를 검토하여 설계된 블레이드 구조는 어떠한 하중조건에 대해서도 안전함을 확인하였다. 뿐만 아니라, 본 연구에 의해 새롭게 고안된 삽입볼트를 사용한 허브 연결부의의 설계하중과 피로하중에 대한 안전성을 검토하였으며, 잘 알려진 S-N 선형 손상 이론, 하중 스펙트럼 및 Spera의 실험식에 의해 20년 이상의 피로수명을 갖도록 하였다. 몇 개의 집중하중으로 모사된 공력하중에 대한 실물 정적구조시험을 수행하였으며, 실험결과로부터 설계된 블레이드는 구조적으로 안전함을 확인하였다. 더욱이, 변위 및 응력, 중량, 무게중심 증의 측정된 결과는 해석결과와 일치함을 확인하였으며, 연구된 블레이드는 독일의 국제적 인증기관인 GL사의 인증을 획득하였다. In this study, the various load cases by specified by the IEC61400-1 international specification and GL Regulations for the wind energy conversion system were considered, and a specific composite structure configuration which can effectively endure various loads was proposed. In order to evaluate the structure, the structural analysis for the composite wind turbine blade was performed using the finite element method(FEM). In the structural design, the acceptable configuration of blade structure was determined through the parametric studies, and the most dominant design parameters were confirmed. In the stress analysis using the FEM, it was confirmed that the blade structure was safe and stable for all the considerd load cases. Moreover the safety of the blade root joint with insert bolts, newly devised in this study, was checked against the design loads and also the fatigue loads. The fatigue life for operating more than 20 years was estimated by using the well-known S-N linear damage rule, the load spectrum and Spera's empirical equations. The full-scale static test was performed under the simulated aerodynamic loads. from the experimental results, it was found that the designed blade had the structural integrity. Furthermore the measured results were agreed with the analytical results such as deflections, strains, the mass and the radial center of gravity. The studied blade was successfully certified by an international institute, GL, of Germany." @default.
• W802324914 created "2016-06-24" @default.
• W802324914 date "2003-06-30" @default.
• W802324914 modified "2023-10-18" @default.
• W802324914 title "Structural Design and Experimental Investigation of A Medium Scale Composite Wind Turbine Blade Considering Fatigue Life" @default.
• W802324914 cites W1993172973 @default.
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• W802324914 doi "https://doi.org/10.5139/jksas.2003.31.3.023" @default.
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