Experimental Validation of Normalized Uniform Load Surface Curvature Method for Damage Localization
Abstract
:1. Introduction
2. Theory
2.1. Uniform Load Surface (ULS) Method
2.2. ULS Curvature Method
2.3. Normalized Uniform Load Surface (NULS) Curvature Method
2.4. Damage Localization by NULS Curvature Method under Noisy Measurements
3. Experimental Validation of the NULS Curvature Method
3.1. Numerical Simulations as a Preliminary Step
Parameters | Value |
---|---|
Damping ratio | 0.005 |
Mass density () | 7850 kg m−3 |
Poisson’s ratio () | 0.28 |
Elasticity modulus (E) | 200 GPa |
Length (L) | 2.04 m |
Width (w) | 100 mm |
Thickness (t) | 10 mm |
Case | First Mode | Second Mode | ||||
---|---|---|---|---|---|---|
f1 (Hz) | Δ f1/f1 (%) | MAC | f2 (Hz) | Δ f2/f2 (%) | MAC | |
IC | 6.1018 | - | 1.0000 | 24.273 | - | 1.0000 |
DC1 | 6.0979 | −0.064% | 0.9999 | 24.217 | −0.230% | 0.9999 |
DC2 | 6.0619 | −0.654% | 0.9999 | 24.193 | −0.328% | 0.9999 |
3.2. Experimental Results
Case | First Mode | Second Mode | ||||
---|---|---|---|---|---|---|
f1 (Hz) | Δ f1/f1 (%) | MAC | f2 (Hz) | Δ f2/f2 (%) | MAC | |
IC | 6.2593 | - | 1.0000 | 25.934 | - | 1.0000 |
DC1 | 6.2558 | −0.0567% | 0.9999 | 25.967 | 0.1273% | 0.9992 |
DC2 | 6.2495 | −0.1580% | 0.9999 | 25.883 | −0.1960% | 0.9999 |
3.3. Comparative Study
4. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
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Jung, H.-Y.; Sung, S.-H.; Jung, H.-J. Experimental Validation of Normalized Uniform Load Surface Curvature Method for Damage Localization. Sensors 2015, 15, 26315-26330. https://doi.org/10.3390/s151026315
Jung H-Y, Sung S-H, Jung H-J. Experimental Validation of Normalized Uniform Load Surface Curvature Method for Damage Localization. Sensors. 2015; 15(10):26315-26330. https://doi.org/10.3390/s151026315
Chicago/Turabian StyleJung, Ho-Yeon, Seung-Hoon Sung, and Hyung-Jo Jung. 2015. "Experimental Validation of Normalized Uniform Load Surface Curvature Method for Damage Localization" Sensors 15, no. 10: 26315-26330. https://doi.org/10.3390/s151026315