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Health monitoring of operational structures - initial results

James, G.; Mayes, R.; Carne, T.; Simmermacher, T.; Goodding, J.

Two techniques for damage localization (Structural Translational and Rotational Error Checking - STRECH and MAtriX COmpletioN - MAXCON) are described and applied to operational structures. The structures include a Horizontal Axis Wind Turbine (HAWT) blade undergoing a fatigue test and a highway bridge undergoing an induced damage test. STRECH is seen to provide a global damage indicator to assess the global damage state of a structure. STRECH is also seen to provide damage localization for static flexibility shapes or the first mode of simple structures. MAXON is a robust damage localization tool using the higher order dynamics of a structure. Several options are available to allow the procedure to be tailored to a variety of structures.