Vibration-based damage detection for a composite helicopter main rotor blade

F.L.M. dos Santos , B. Peeters , H. Van der Auweraer , L.C.S. Góes , W. Desmet
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引用次数: 30

Abstract

This work presents experimental results of two damage detection techniques based on modal properties, with the application on a full-size composite helicopter main rotor blade. The damage detection methods used in this study are the coordinate modal assurance criterion (COMAC) and the modal strain energy method, which are respectively based on the comparison of vibration modes and on the comparison of the modal strain energy of a beam. Modal parameters were obtained with experimental modal analysis and damage was introduced artificially on the blade by attaching a small mass to it, changing its global properties in this way. Finally, experimental results for the damage detection technique are shown for both methodologies, and remarks concerning sensitivity and robustness of the methods are discussed.

基于振动的复合材料直升机主旋翼叶片损伤检测
本文介绍了两种基于模态特性的损伤检测技术的实验结果,并在全尺寸复合材料直升机主旋翼桨叶上进行了应用。本文采用的损伤检测方法是坐标模态保证准则(COMAC)和模态应变能法,分别基于振动模态比较和梁的模态应变能比较。通过试验模态分析获得模态参数,并通过在叶片上附加小质量人为地引入损伤,改变叶片的整体特性。最后,给出了两种方法的损伤检测实验结果,并对方法的灵敏度和鲁棒性进行了讨论。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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