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

doi:2011.25.2.73

J. Ocean Eng. Technol. > Volume 25(2); 2011 > Article

J. Ocean Eng. Technol. 2011;25(2):73-78.
DOI: https://doi.org/10.5574/KSOE.2011.25.2.073

Hong Gheol-Hyun

Pusan Educational Center for Computer Aided Machine Design Pusan National University

대형 풍력 발전용 필라멘트 와인딩 복합재 타워의 고유 진동수 해석에 관한 연구

홍철현

부산대학교 기계설계전산화인력양성센터

Keywords: Composite, Filament-wound, Tower, Wind-turbine, FEM

핵심용어: 복합재, 필라멘트 와인딩, 타워, 유한요소법

Abstract

The purpose of this study was to investigate the natural frequency 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 the 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 modal analysis of the tower, filament-wound with angles of $[{pm}30]$, was carried out using the two methods for composite material properties, the stacking method and effective method. Then, an FE analysis was performed for composite towers using 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 and material properties methods was approximately 0~0.6%