Structural Damage Detection Using Modal Curvature and Fuzzy Logic

Structural Health Monitoring - Tập 8 Số 4 - Trang 267-282 - 2009
M. Chandrashekhar1, Ranjan Ganguli2
1Department of Aerospace Engineering, Indian Institute of Science, Bangalore 560012, India
2Department of Aerospace Engineering, Indian Institute of Science Bangalore 560012, ,

Tóm tắt

A fuzzy logic system (FLS) with a new sliding window defuzzifier is proposed for structural damage detection using modal curvatures. Changes in the modal curvatures due to damage are fuzzified using Gaussian fuzzy sets and mapped to damage location and size using the FLS. The first four modal vectors obtained from finite element simulations of a cantilever beam are used for identifying the location and size of damage. Parametric studies show that modal curvatures can be used to accurately locate the damage; however, quantifying the size of damage is difficult. Tests with noisy simulated data show that the method detects damage very accurately at different noise levels and when some modal data are missing.

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Structural Health Monitoring

Tập 8 Số 4

267-282

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