Vibration-based damage detection for a composite helicopter main rotor blade. (June 2016)

• Record Type: Journal Article
• Authors: dos Santos, F.L.M.; Peeters, B.; Van der Auweraer, H.; Góes, L.C.S.; Desmet, W.
• Is Part Of: Case studies in mechanical systems and signal processing. Volume 3(2016)
• Page Start: 22
• Page End: 27
• Publication Date: 2016-06
• Subjects: Structural health monitoring -- Helicopter blade model -- Strain energy damage index -- Vibration based damage detection; Mechanical engineering -- Case studies -- Periodicals; Industrial engineering -- Case studies -- Periodicals; Signal processing -- Case studies -- Periodicals; 620.105
• DOI: 10.1016/j.csmssp.2016.01.001
• Languages: English
• ISSNs: 2351-9886

Abstract

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.