水平轴风力机风轮结构特性综合剪裁

Structural Dynamics Tailoring for Horizontal Axis Wind Turbine Blade

基于静态与动态测试技术 ,对水平轴风力机风轮的结构特性进行了综合剪裁。在静态结构特性方面 ,用单点加集中荷载所得数据来综合评定受分布荷载作用的风轮叶片的强度及变形特性。为风轮叶片强度设计提供有效的判据。在动态测试方面 ,应用DAS动态信号分析与故障诊断系统 ,对水平轴风力机的风轮叶片进行了试验模态分析 ,通过测量风轮叶片的振动信号 ,得到了风轮叶片的各阶模态分布 ,为风力机总机的总体优化设计提供了可靠的依据。

In this paper, the experimental study of static and dynamic testing technologies for a horizontal axis wind turbine (HAWT) blade has been conducted. A new measurement method, i.e., the local-loaded method, is adopted for the measurement of static structural characteristics of global strength and deformation of a (HAWT) blade. Consequently, the experimental data definitely contribute a lot to the blade optimum design. The turbine blade modal analysis provides significant basis for dynamic study and stability analysis of HAWT. The experimental modal analysis of a HAWT blade is given by utilizing the DAS (Dynamic Signal Analysis and Fault Diagnosis System). Modal parameters are obtained through the measurement of vibration signals along different locations in blade span-wise. Furthermore, the parameter identification and accurate uncertainty are discussed. Based on the results of static and modal measurement in the paper, the structural dynamics tailoring about the HAWT blade has been performed to provide efficient assessment for performance improvement as well as optimum design of HAWT.