Structural health monitoring of plates with surface features using guided ultrasonic waves

P. Fromme

doi:10.1117/12.815530

8 April 2009 Structural health monitoring of plates with surface features using guided ultrasonic waves

P. Fromme

Proceedings Volume 7295, Health Monitoring of Structural and Biological Systems 2009; 729517 (2009) https://doi.org/10.1117/12.815530
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2009, San Diego, California, United States

Abstract

Distributed array systems for guided ultrasonic waves offer an efficient way for the long-term monitoring of the structural integrity of large plate-like structures. The measurement concept involving baseline subtraction has been demonstrated under laboratory conditions. For the application to real technical structures it needs to be shown that the methodology works equally well in the presence of structural and surface features. Problems employing this structural health monitoring concept can occur due to the presence of additional changes in the signal reflected at undamaged parts of the structure. The influence of the signal processing parameters and transducer placement on the damage detection and localization accuracy is discussed. The use of permanently attached, distributed sensors for the A0 Lamb wave mode has been investigated. Results are presented using experimental data obtained from laboratory measurements and Finite Element simulated signals for a large steel plate with a welded stiffener.

Citation Download Citation

P. Fromme "Structural health monitoring of plates with surface features using guided ultrasonic waves", Proc. SPIE 7295, Health Monitoring of Structural and Biological Systems 2009, 729517 (8 April 2009); https://doi.org/10.1117/12.815530

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