本論文主要目的為1.5MW複合材料風車葉片於穩定運轉期間之結構與自然頻率分析。程序中將引用美國國家再生能源實驗室NREL 所發展之FASTv6.0風車模擬程式，以輸出1.5MW、3個葉片、上風式、水平軸式風車的相關運轉資訊，再從FAST輸出資訊中轉換獲得該葉片運轉期間所承受之等效力和等效力矩等負載，以提供ANSYS有限元素分析軟體之風車葉片模型進行變形量分析。經比對FAST及ANSYS兩種分析程式之複材葉片尖端變形量，發現有相當不錯之結果。文中並分析同規格之玻璃纖維、碳纖維及6063鋁合金三種材質風車葉片自然振動頻率，藉以討論不同材質葉片對風車運轉特性之影響。
經由上述的方法，將可以提供風車設計者先行預判葉片穩定運轉期間之受力變形情況及自然振動模態外型與頻率，有效降低實體測試之成本。

The main purpose of this thesis is to analyze the structure condition and the nature frequency of a 1.5MW composite material wind turbine blade during steady state operation. During the analysis, we adopted a FASTv6.0 simulation code which was developed by NREL (National Renewable Energy Laboratory U.S.A) to extract the 1.5MW, three-blades, up-wind and horizontal-axis wind turbine model operating information. By transferring FAST code output file data, we then acquired the equivalent force and moment that could be imported to commercial FEA software-ANSYS for blade model structure deflection analysis. The code computed results were compared with that from FASTv6.0. We founded that the ANSYS results were in good agreement with FASTv6.0 results. Three different materials (i.e. Glass fiber composite, Carbon fiber composite and 6063 Aluminum alloy) were used as the turbine blade materials. The corresponding blade structure response and blade operation characteristics were also studied. Current analysis can be used to a wind turbine designer for predicting the blade deflection and the nature frequency during steady state operation and it saves the cost of full-scale testing for the huge 1.5MW wind turbine blade.

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