Field testing of an in-service wind turbine tower using a laser based remote sensing method
-
摘要: 风力发电塔作为一类特殊的高柔结构,顶部支撑的风机在工作状态下对塔身产生动态激励,目前的风电塔振动实测通常采用接触式传感器.为发展风电塔现场非接触测试技术,本文对激光遥测方法进行阐述,利用加速度计和激光遥测设备对某1.5 MW风电塔进行环境脉动激励下的动力实测,对两种仪器的现场使用及测试结果进行对比,分析遥测方法的优势.利用得到的多组实测信号,分别采用峰值拾取法和随机子空间识别法进行分析处理,获得该风电塔的自振频率.Abstract: As a special slender structure,a wind turbine tower with a turbine on the top of the structure is sensitive to dynamic loading. Therefore,it is critical to accurately assess the vibrational behaviors of the wind turbine tower. To facilitate field testing of wind turbine towers,a laser Doppler vibrometer was proposed in the ambient vibration testing. Comparisons between the conventional contact accelerometer method and the laser based remote sensing method were made in the aspects of testing efficiency and result validity. Based on a series of vibration signals collected from a 1.5 MW wind turbine tower,the natural frequencies of this tower were obtained by using different vibration analysis methods.
-
计量
- 文章访问数: 300
- HTML全文浏览量: 45
- PDF下载量: 17
下载:
