影響風機發電效率最主要的因素之一就是葉片的設計,而葉片的強度設計也是很重要的一環,通常會在葉片複合材料的選擇上或薄殼厚度與肋材的選用來增加葉片強度。本研究使用不同肋材數量的葉片導入計算流體力學軟體ANSYS / CFX,對風力發電機整機做流固耦合分析,探討在各風速下,不同肋材數量葉片的表面壓力分佈,並求解結構應力及結構變形量。最後再運用多體動力學系統分析軟體RecurDyn 做動態分析模擬,將葉片轉換成撓性體,並把風速轉換成風壓施加在葉片上,模擬在風場中的結構應力分佈與結構變形量並與流固耦合分析結果做一誤差比較。
The most important factor is design of the blades in effect of wind power generation efficiency. The strength design also plays an important role, we usually increase the blade strength to make the selected of composite material or shell thickness as well as ribs. In this paper, we use the computational fluid dynamic software ANSYS/CFX to solve for dynamic solutions on the different numbers of ribs in blades. So we compute the dynamic behaviors of wind turbine which is using fluid structure interaction analysis, and not only solve the stress and deformation of structure, but also discussed the wind pressure on blade with different wind speeds. Finally, we apply multi-body system dynamics simulation software RecurDyn to turn the blade into flexible, then transform the wind speeds into wind pressure on the blade. The wind field of the stress and deformation of the structure can be analyzed and simulated. One can compare the result of the fluid structure interaction analysis with different methods.