Nonlinear Features for SHM Applications
Published Online: 15 SEP 2009
Copyright © 2009 John Wiley & Sons, Ltd. All rights reserved.
Encyclopedia of Structural Health Monitoring
How to Cite
Nichols, J. M. and Todd, M. D. 2009. Nonlinear Features for SHM Applications. Encyclopedia of Structural Health Monitoring. .
- Published Online: 15 SEP 2009
In structural health monitoring, it is often the case that the dynamics of the structure being monitored are appropriately described by a nonlinear model. The statistical properties of the structural response data are therefore different from those contained in a linear structure's response. Taking these properties into account when computing damage-sensitive features results in a more powerful approach to assessing damage presence, magnitude, location, and type over methods that rely on linear statistical properties. This article describes a variety of ways in which nonlinearity appears in structural dynamics and reviews a number of strategies for incorporating nonlinearity in the feature-extraction process.
- structural health monitoring;
- phase space;
- higher-order spectra;