Experimental system identification of the Vibro-impact dynamics towards structural health monitoring and damage detection

Heng Chen, Young S. Lee, Mehmet Kurt, D. Michael McFarland, Lawrence A. Bergman, Alexander F. Vakakis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We perform nonlinear system identification (NSI) on the acceleration signals that were experimentally measured at ten, almost evenly spaced positions along a cantilever beam undergoing vibro-impacts between two rigid stops with clearances. The NSI methodology is based on the correspondence between analytical and empirical slow-flow dynamics, with the first step requiring empirical mode decomposition (EMD) analysis of the measured time series leading to sets of intrinsic modal oscillators (IMOs) governing the vibro-impact dynamics at different time scales. By comparing the spatiotemporal variations of the nonlinear modal interactions (and hence the IMOs), we examine how vibro-impacts influence the low-and high-frequency modes in global and local senses. In applications of the NSI results to structural health monitoring and damage detection (SHM / DD), we calculate typical measures such as the modal assurance criterion (MAC) and the coordinate modal assurance criterion (COMAC) by extracting information about the mode shape functions from the spatiotemporal IMO solutions. Whereas the MAC provides a global aspect of damage occurrence (i.e., which modes are more affected by induced defects), the COMAC can narrow down the damage locations (i.e., where in the structure defects exist that yield low correlation values in specific modes). Finally, we discuss the use of the 2-dimensional correlation spectroscopy technique to SHM / DD, which is frequently used in optical chemistry areas. With the spatiotemporal IMOs the 2-D correlation intensity for the linear beam is proportional to the product of the two mode shape functions at the respective positions; hence any deviations from that may indicate the occurrence and locations of damage in the structure.

Original languageEnglish (US)
Title of host publication22nd Reliability, Stress Analysis, and Failure Prevention Conference; 25th Conference on Mechanical Vibration and Noise
PublisherAmerican Society of Mechanical Engineers
ISBN (Print)9780791855997
DOIs
StatePublished - Jan 1 2013
EventASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2013 - Portland, OR, United States
Duration: Aug 4 2013Aug 7 2013

Publication series

NameProceedings of the ASME Design Engineering Technical Conference
Volume8

Other

OtherASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2013
CountryUnited States
CityPortland, OR
Period8/4/138/7/13

Fingerprint

Damage Detection
Structural Dynamics
Damage detection
Structural health monitoring
Health Monitoring
System Identification
Nonlinear System Identification
Nonlinear systems
Identification (control systems)
Mode Shape
Damage
Shape Function
Defects
Defect structures
Cantilever beams
Cantilever Beam
Time series
Clearance
Spectroscopy
Chemistry

ASJC Scopus subject areas

  • Modeling and Simulation
  • Mechanical Engineering
  • Computer Science Applications
  • Computer Graphics and Computer-Aided Design

Cite this

Chen, H., Lee, Y. S., Kurt, M., McFarland, D. M., Bergman, L. A., & Vakakis, A. F. (2013). Experimental system identification of the Vibro-impact dynamics towards structural health monitoring and damage detection. In 22nd Reliability, Stress Analysis, and Failure Prevention Conference; 25th Conference on Mechanical Vibration and Noise (Proceedings of the ASME Design Engineering Technical Conference; Vol. 8). American Society of Mechanical Engineers. https://doi.org/10.1115/DETC2013-13534

Experimental system identification of the Vibro-impact dynamics towards structural health monitoring and damage detection. / Chen, Heng; Lee, Young S.; Kurt, Mehmet; McFarland, D. Michael; Bergman, Lawrence A.; Vakakis, Alexander F.

22nd Reliability, Stress Analysis, and Failure Prevention Conference; 25th Conference on Mechanical Vibration and Noise. American Society of Mechanical Engineers, 2013. (Proceedings of the ASME Design Engineering Technical Conference; Vol. 8).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Chen, H, Lee, YS, Kurt, M, McFarland, DM, Bergman, LA & Vakakis, AF 2013, Experimental system identification of the Vibro-impact dynamics towards structural health monitoring and damage detection. in 22nd Reliability, Stress Analysis, and Failure Prevention Conference; 25th Conference on Mechanical Vibration and Noise. Proceedings of the ASME Design Engineering Technical Conference, vol. 8, American Society of Mechanical Engineers, ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2013, Portland, OR, United States, 8/4/13. https://doi.org/10.1115/DETC2013-13534
Chen H, Lee YS, Kurt M, McFarland DM, Bergman LA, Vakakis AF. Experimental system identification of the Vibro-impact dynamics towards structural health monitoring and damage detection. In 22nd Reliability, Stress Analysis, and Failure Prevention Conference; 25th Conference on Mechanical Vibration and Noise. American Society of Mechanical Engineers. 2013. (Proceedings of the ASME Design Engineering Technical Conference). https://doi.org/10.1115/DETC2013-13534
Chen, Heng ; Lee, Young S. ; Kurt, Mehmet ; McFarland, D. Michael ; Bergman, Lawrence A. ; Vakakis, Alexander F. / Experimental system identification of the Vibro-impact dynamics towards structural health monitoring and damage detection. 22nd Reliability, Stress Analysis, and Failure Prevention Conference; 25th Conference on Mechanical Vibration and Noise. American Society of Mechanical Engineers, 2013. (Proceedings of the ASME Design Engineering Technical Conference).
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