Recently, wind power has received attention as one of remarkable renewable energy resources, and worldwide researches about wind power are actively being proceeded. Wind turbine tower has a major role for safety in the wind turbine systems. It is necessary for design tower structure to consider various environmental conditions. Earthquake, as one of the such environmental loads, is ground motion that applied to bottom of the tower structure and has a possibility of critical effect to the wind tower structure. There are various ways for seismic analysis, but design specifications that are in use do not suggest detailed method for seismic analysis. In this study, seismic responses are analyzed through different ways and the adequacy of seismic design methods is examined.

ABSTRACT
 1. 서 론
 2. 풍력발전타워의 내진설계
  2.1 내진설계 Flow Chart
  2.2 설계기준 분석
 3. 지진응답해석
  3.1 시간이력해석
  3.2 응답스펙트럼해석
  3.3 설계응답스펙트럼
  3.4 인공지진
 4. FEM을 이용한 구조해석
  4.1 해석모델
  4.2 시간이력해석
  4.3 응답스펙트럼해석
 5. 결론
 References

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