A local damage at the tip of a composite propeller is diagnosed by properly comparing its impact-induced free coupled dynamics to that of a pristine wooden propeller of the same size and shape. This is accomplished by creating indirectly via collocated measurements distributed information for the coupled acceleration field of the propellers. The powerful data-driven modal expansion analysis delivered by the Proper Orthogonal Decomposition (POD) Transform reveals that ensembles of impact-induced collocated coupled experimental acceleration signals are underlined by a high level of spatio-temporal coherence. Thus they furnish a valuable spatio-temporal sample of coupled response induced by a point impulse. In view of this fact, a tri-axial sensor was placed on the propeller hub to collect collocated coupled acceleration signals induced via modal hammer nondestructive impacts and thus obtained a reduced order characterization of the coupled free dynamics. This experimental data-driven analysis reveals that the in-plane unit components of the POD modes for both propellers have similar shapes-nearly identical. For the damaged propeller this POD shape-difference is quite pronounced. The shapes of the POD modes are used to compute indices of difference reflecting directly damage. At the first POD energy level, the shape-difference indices of the damaged composite propeller are quite larger than those of the pristine wooden propeller.
Skip Nav Destination
ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
September 18–21, 2011
Scottsdale, Arizona, USA
Conference Sponsors:
- Aerospace Division
ISBN:
978-0-7918-5472-3
PROCEEDINGS PAPER
Damage Detection in Flexible Propeller Beam Structures by Exploiting Impact-Induced Coupled Acceleration Signals
Ioannis T. Georgiou
Ioannis T. Georgiou
National Technical University of Athens, Athens, Greece
Search for other works by this author on:
Ioannis T. Georgiou
National Technical University of Athens, Athens, Greece
Paper No:
SMASIS2011-4993, pp. 455-463; 9 pages
Published Online:
February 7, 2012
Citation
Georgiou, IT. "Damage Detection in Flexible Propeller Beam Structures by Exploiting Impact-Induced Coupled Acceleration Signals." Proceedings of the ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 2. Scottsdale, Arizona, USA. September 18–21, 2011. pp. 455-463. ASME. https://doi.org/10.1115/SMASIS2011-4993
Download citation file:
5
Views
Related Proceedings Papers
Related Articles
Reliability Monitoring in Drilling Electronic Circuit
Boards
J. Electron. Packag (September,1991)
Numerical Computation of Shock Waves in a Spherical Cloud of Cavitation Bubbles
J. Fluids Eng (December,1999)
Damage Classification of Composites Based on Analysis of Lamb Wave Signals Using Machine Learning
ASME J. Risk Uncertainty Part B (March,2021)
Related Chapters
Generating Synthetic Electrocardiogram Signals Withcontrolled Temporal and Spectral Characteristics
Intelligent Engineering Systems through Artificial Neural Networks Volume 18
Summary of Water Hammer-Induced Pipe Failures
Fluid Mechanics, Water Hammer, Dynamic Stresses, and Piping Design
Phase Estimation Based Channel Equalization Technique for 64-QAM Communication
International Conference on Computer and Automation Engineering, 4th (ICCAE 2012)