堆疊型垂直軸式風力機之複材葉片的試驗及測試平台的開發

A Testing Platform for Composite Blades of Stackable Vertical-Axis Wind Turbines

本研究開發複合材料結構之堆疊型垂直軸式風力發電機組（Stackable Vertical-Axis Wind Turbine,SVAWT）葉片的各項夾治具開發，並建立關鍵元件及結構的測試方法，確保測試元件和結構都滿足國際規範的要求，並將輔助工程軟體CAD/CAE運用到設計及實驗階段，有效的縮短葉片設計的週期及模擬驗證的可靠性。葉片結構可靠性是風電機組的重要指標，本研究主要的測試為SVAWT葉片的靜、動態試驗，以了解葉片的靜態特性、疲勞特性及運轉的可靠性。從靜態實驗了解葉片的結構強度，葉片所能承受的最大壓力及破壞模式，進而改善應力集中避免疲勞破壞，以建立葉片可承受最大風速之允收標準。透過SVAWT葉片結構特性之基礎研究，改善其葉片結構的部件設計及完成葉片的疲勞壽命分析，經由本研究建立之疲勞壽命理論可有效的預測SVAWT葉片之壽命，其技術可提供產學相關開發資訊之用。

Wind turbines are of 2 main types, horizontal-axis and vertical-axis wind turbines [HAWT and VAWT]. Sufficient engineering examples and international standards are unavailable for guiding stackable-VAWT（SVAWT） design. Therefore, in accordance with relevant IEC-61400 standards, a clamping apparatus was developed to test composite blades in test platforms, and engineeringsoftware CAD/CAE was used to support the design and experimental stages. Using CAD/CAE also shortened the design cycle effectively and made simulation analysis more reliable. Moreover, the failure modes and test results of SVAWT blades under distinct manufacturing conditions were examined to verify the proposed experimental setup and manufacturing techniques. Static and fatigue tests were performed on SVAWT blades to understand the structural strength of the blades and identify the blades that could withstand maximal pressure and the failure mode in static experiments.Thus, the stress concentration was improved to avoid fatigue failure establishing that the blades can withstand the maximal wind speed listed as an acceptance criterion. This study establishes that the fatigue-life equation developed using the fatigue theory can predict the life of SVAWT blades effectively. Information on technology developed here can be provided on request.