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Proceedings Paper

Proper orthogonal decomposition analysis of scanning laser Doppler vibrometer measurements of plaster status at the U.S. Capitol
Author(s): Joseph F. Vignola; Joseph A. Bucaro; James F. Tressler; Damon Ellingston; Andrew J. Kurdila; George Adams; Barbara Marchetti; Alexia Agnani; Enrico Esposito; Enrico Primo Tomasini
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Paper Abstract

A large-scale survey (~700 m2) of frescos and wall paintings was undertaken in the U.S. Capitol Building in Washington, D.C. to identify regions that may need structural repair due to detachment, delamination, or other defects. The survey encompassed eight pre-selected spaces including: Brumidi's first work at the Capitol building in the House Appropriations Committee room; the Parliamentarian's office; the House Speaker's office; the Senate Reception room; the President's Room; and three areas of the Brumidi Corridors. Roughly 60% of the area surveyed was domed or vaulted ceilings, the rest being walls. Approximately 250 scans were done ranging in size from 1 to 4 m2. The typical mesh density was 400 scan points per square meter. A common approach for post-processing time series called Proper Orthogonal Decomposition, or POD, was adapted to frequency-domain data in order to extract the essential features of the structure. We present a POD analysis for one of these panels, pinpointing regions that have experienced severe substructural degradation.

Paper Details

Date Published: 22 June 2004
PDF: 9 pages
Proc. SPIE 5503, Sixth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (22 June 2004); doi: 10.1117/12.579766
Show Author Affiliations
Joseph F. Vignola, Naval Research Lab. (United States)
Joseph A. Bucaro, Naval Research Lab. (United States)
James F. Tressler, Naval Research Lab. (United States)
Damon Ellingston, Naval Research Lab. (United States)
Andrew J. Kurdila, Univ. of Florida (United States)
George Adams, Cunningham-Adams (United States)
Barbara Marchetti, Univ. Politecnica delle Marche (Italy)
Alexia Agnani, Univ. Politecnica delle Marche (Italy)
Enrico Esposito, Univ. Politecnica delle Marche (Italy)
Enrico Primo Tomasini, Univ. Politecnica delle Marche (Italy)

Published in SPIE Proceedings Vol. 5503:
Sixth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications
Enrico Primo Tomasini, Editor(s)

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