Towards a FRF-based parametric surrogate for guided wave-based evaluation in multiple defect scenarios

Paul Sieber; Konstantinos Agathos; Rohan Soman; Wieslaw Ostachowicz; Eleni Chatzi

doi:10.1117/12.3009903

9 May 2024 Towards a FRF-based parametric surrogate for guided wave-based evaluation in multiple defect scenarios

Paul Sieber, Konstantinos Agathos, Rohan Soman, Wieslaw Ostachowicz, Eleni Chatzi

Proceedings Volume 12951, Health Monitoring of Structural and Biological Systems XVIII; 129510C (2024) https://doi.org/10.1117/12.3009903
Event: SPIE Smart Structures + Nondestructive Evaluation, 2024, Long Beach, California, United States

Abstract

Ultrasonic Guided Waves (UGWs) are particularly suited for monitoring applications as their high frequency allows them to interact with small defects while traveling long distances. For defect localization in plate structures, Lamb waves are generated and exploited in the UGW sense. While data-driven methods, exclusively driven from the collected time series have proven adept for various damage identification tasks, a more refined characterization calls for additional use of physics-based models. In this work, we demonstrate efficient fusion of UGW data with numerical models of plate structures, which are obtained from high-fidelity spectral element simulations. A major bottleneck associated with such a hybrid modeling scheme lies in the excessive computational cost associated with simulations of high–frequency Lamb waves through plate structures. This is due to their short wavelength and short period, which demands a fine discretization in both space and time. To avoid repeated evaluations of prohibitively expensive computational models, model order reduction methods or surrogates can be adopted. A surrogate model should be based on mechanical information, to reduce the amount of training data required. For practical reasons, surrogate models should further be flexible, allowing for assimilation of multiple defect locations, as well as the simulation of more complex geometrical features, such as rivet holes or boundaries. We show steps toward construction of such a surrogate, which draws its construct from the concept of Frequency Response Functions (FRFs), or in other words, the representation of a system in the frequency domain.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Paul Sieber, Konstantinos Agathos, Rohan Soman, Wieslaw Ostachowicz, and Eleni Chatzi "Towards a FRF-based parametric surrogate for guided wave-based evaluation in multiple defect scenarios", Proc. SPIE 12951, Health Monitoring of Structural and Biological Systems XVIII, 129510C (9 May 2024); https://doi.org/10.1117/12.3009903

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available