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Buckling Analysis of Filament-wound Composite Towers for Large Scale Wind-Turbine

대형 풍력발전용 필라멘트 와인딩 복합재 타워의 좌굴 해석

  • Han, Jeong-Young (Pusan Educational Center for Computer Aided Machine Design, Pusan National University) ;
  • Hong, Cheol-Hyun (Pusan Educational Center for Computer Aided Machine Design, Pusan National University)
  • 한정영 (부산대학교 기계설계전산화인력양성센터) ;
  • 홍철현 (부산대학교 기계설계전산화인력양성센터)
  • Received : 2011.02.24
  • Accepted : 2011.04.22
  • Published : 2011.04.30

Abstract

The purpose of this study was to investigate the buckling load of filament-wound composite towers for large scale wind-turbines using the finite element method (FEM). To define the material properties, we used both the effective property method and stacking properties method. The effective properties method assumes that a composite consists of one ply. The stacking properties method assumes that a composite consists of several stacked plies. First, a linear buckling analysis of the tower, filament-wound with angles of $[{\pm}60]$, was carried out using the two methods for composite material properties: the stacking method and effective method. An FE analysis was also performed for the composite towers using the filament winding angles of $[{\pm}30]$, $[{\pm}45]$, and $[{\pm}60]$. The FE analysis results using the stacking properties of the composite were in good agreement with the results from the effective properties method. The difference between the FEM results and material properties method was approximately 0~2.3%. Above the angle of $[{\pm}60]$, there was little change in the buckling load.

Keywords

Composite;Filament-wound;Tower;Wind-turbine;Buckling

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