基于波速修正和距离权值的风机叶片损伤定位成像方法

Damage Localization and Imaging Method Based on the Corrected Wave Velocity and the Distance Weighting for Wind Turbine Blade

针对Lamb波被动监测方法中存在的损伤定位误差较大,检测结果不够直观、准确等问题,以风机叶片为对象,研究了复合材料结构冲击响应波速修正值标定方法和基于像素点对比度的损伤定位成像矩阵,在此基础上提出了基于波速修正值和距离权值的风机叶片损伤定位成像方法。试验结果表明:与传统的被动定位监测相比,该方法损伤定位误差小,成像位置准确。

Aiming at the problem that the damage localization error exists in the Lamb wave passive monitoring method,and the detection result is not intuitive and accurate,a solution for damage localization and imaging for wind turbine blade is proposed that is based on the corrected wave velocity and the distance weighting.The proposed solution assesses the structure of wind turbine blade and studies the revised velocity of shocking response wave demarcating method to the structure of composite material and damage location based on pixel contrast imaging matrix.The provided experiment results demonstrate that compared with traditional passive positioning monitoring,the locating error of the proposed method is smaller and the imaging position is more accurate.