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针对柔性叶片风能转换装置的结构特点,采用多点瞬态压力测试系统,建立柔性叶片结构风振响应时域分析的实验研究方法。基于功率谱密度分析原理,运用Matlab对不同弯度叶片后缘处的风压时程和功率谱密度进行对比分析,发现柔性叶片的弯度会影响叶片的颤振幅度和频率,合理的叶片弯曲形状会提高风轮的运行稳定性,该研究结果可为柔性叶片风能转换装置的结构优化奠定基础。
Aiming at the structural characteristics of flexible blade wind energy conversion device, a multi-point transient pressure test system is used to establish the experimental research method of time-domain analysis of wind-induced vibration response of flexible blade structure. Based on the principle of power spectral density analysis, the wind pressure time history and power spectral density at the trailing edge of different camber blades were compared and analyzed by using Matlab. It was found that the camber of flexible blades affected the chatter amplitude and frequency of the blades. Reasonable blade bending shape Improve the running stability of wind turbine. The results of this study can lay the foundation for structural optimization of flexible blade wind energy conversion device.