The evaluation of the structural performance and durability using only measurement data without any baseline data is practical. One measurement data type is the frequency response function (FRF) data set, which does not provide enough information about the health state because of the noise included in the data. Proper orthogonal modes (POMs) extracted from the FRF data in a prescribed frequency range are utilized as an index to recognize the existence of damage. The POMs represent the principal axes of inertia formed by the distribution of data on the modal coordinate curve. This work proposes a damage detection method to trace damage based on the POM energy curvature at the element of the finite element model. The validity of the proposed method is illustrated by a numerical experiment and an experimental test.
Damage Identification Based on the Proper Orthogonal Mode Energy Curvature
Contributed by the Technical Committee on Vibration and Sound of ASME for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received July 1, 2014; final manuscript received March 10, 2015; published online April 24, 2015. Assoc. Editor: Jeffrey F. Rhoads.
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Lee, E., and Eun, H. (August 1, 2015). "Damage Identification Based on the Proper Orthogonal Mode Energy Curvature." ASME. J. Vib. Acoust. August 2015; 137(4): 041018. https://doi.org/10.1115/1.4030043
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