Modal Strain Energy Decomposition Method for Damage Detection of an Offshore Structure Using Modal Testing Information
نویسندگان
چکیده
A newly derived damage location algorithm is proposed to predict location of damage in offshore structures using changes in mode shapes from modal testing. This method decomposes elemental modal strain energy into two parts, and defines two damage indicators: axial damage indicator and transverse damage indicator. Analyzing the joint information of the two damage indicators can localize damage elements. In order to validate the damage detection method, a physical platform model was manufactured and several damage cases were simulated. Results demonstrates that the proposed method is effective for the structural damage detection and achieves satisfactory precision.
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