## Abstract

The feasibility of vibration data to identify damage in a population of cylindrical shells is assessed. Vibration data from a population of cylinders were measured and modal analysis was employed to obtain natural frequencies and mode shapes. The mode shapes were transformed into the Coordinate Modal Assurance Criterion (COMAC). The natural frequencies and the COMAC before and after damage for a population of structures show that modal analysis is a viable route to damage identification in a population of nominally identical cylinders. Modal energies, which are defined as the integrals of the real and imaginary components of the frequency response functions over various frequency ranges, were extracted and transformed into the Coordinate Modal Energy Assurance Criterion (COMEAC). The COMEAC before and after damage show that using modal energies is a viable approach to damage identification in a population of cylinders.

Original language | English |
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Pages (from-to) | I/- |

Journal | Proceedings of SPIE - The International Society for Optical Engineering |

Volume | 4062 |

Publication status | Published - 2000 |

Externally published | Yes |

Event | IMAC-XVIII: A Conference on Structural Dynamics 'Computational Challenges in Structural Dynamics' - San Antonio, TX, USA Duration: 7 Feb 2000 → 10 Feb 2000 |

## ASJC Scopus subject areas

- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering