Wind tower structure has relatively simple shape compared to other structures, but due to its characteristics, various and irregular environmental loads are applied. These loads cause vibrations at tower, and can cause failure of the structure if over vibration occurs. Vibration occurred at structures is gradually exhausted by damping of the structures, and if high damping is ensured, the failure of the structure due to over vibration can be prevented. In this study, the vibration reduction effects are to be analyzed through FEM analysis by examining the top displacement, bottom moment, and bottom fatigue damage of the structure depending on damping ratio of the wind tower structure.

ABSTRACT
 1. 서 론
 2. 해석 모델
  2.1 대상 풍력터빈
  2.2 타워 모델
  2.3 풍하중
 3. 구조 해석
  3.1 타워 상단 변위
  3.2 타워 하단 모멘트
  3.3 하단부 피로손상
 4. 결 론
 References

• 이윤우(고려대학교 건축사회환경공학과) | Lee Yun-Woo
• 김승준(대전대학교 건설안전방재공학과) | Kim Seung-Jun
• 강영종(고려대학교 건축사회환경공학과) | Kang Young-Jong
• 한상윤(고려대학교 초대형구조기술연구소) | Han Sang-Yun