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Practical Evaluation of SHM Damage Detection Under Complex Environmental Conditions Using Receiver Operating Characteristics

C. LIU, J. DOBSON, P. CAWLEY

Abstract


Guided wave testing has been widely used as an effective way to inspect and monitor structural integrity. Evaluating the performance of damage detection methods is critical for the practical implementation of such methods, especially for long term monitoring systems under complex environmental and operational conditions (EOC). Although damage can be applied to test structures in a laboratory environment to evaluate the performance, it is often prohibitively expensive to comprehensively investigate the sensitivity of damage detection on different damage types, sizes, and locations under different EOC. In this paper, we propose a cost-effective methodology to evaluate the performance and estimate the sensitivity of damage detection methods by synthesizing undamaged records collected under varying EOCs and simulated artificial damage signals. We produce the receiver operating characteristics (ROC) of damage detection methods on different synthetic datasets to predict the performance in practical scenarios.

doi: 10.12783/SHM2015/243


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