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Titolo:
Stiffness evaluation and damage detection of ceramic candle filters
Autore:
Chen, HL; Kiriakidis, AC;
Indirizzi:
W Virginia Univ, Dept Civil & Environm Engn, Morgantown, WV 26506 USA W Virginia Univ Morgantown WV USA 26506 nm Engn, Morgantown, WV 26506 USA
Titolo Testata:
JOURNAL OF ENGINEERING MECHANICS-ASCE
fascicolo: 3, volume: 126, anno: 2000,
pagine: 308 - 319
SICI:
0733-9399(200003)126:3<308:SEADDO>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
MODAL-ANALYSIS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Chen, HL W Virginia Univ, Dept Civil & Environm Engn, Morgantown, WV 26506USA W Virginia Univ Morgantown WV USA 26506 Morgantown, WV 26506 USA
Citazione:
H.L. Chen e A.C. Kiriakidis, "Stiffness evaluation and damage detection of ceramic candle filters", J ENG MEC, 126(3), 2000, pp. 308-319

Abstract

This paper presents a nondestructive evaluation method to identify the structural stiffness of ceramic candle filters. A ceramic candle filter is a hollow cylindrical structure made of a porous ceramic material used in advanced, coal-fired power generation systems. The candle filters need to sustain an extreme thermal and chemical environment over a great period of time to protect the gas turbine components from exposure to particulate matter. Atotal of 92 new candle filters and 29 used candle filters have been testednondestructively using a dynamic characterization technique. All filters were subjected of an excitation force, and the response was picked up by an accelerometer in a free-free boundary condition. The frequency response function and vibration mode shapes of each filter were evaluated. Beam vibration equations and finite-element models were built to calculate the filter'sdynamic response. Results indicate that the vibration signatures can be used as an index to quantify the structural properties of ceramic candle filters. The results also show estimations of the overall bending stiffness values for four different types of candle filters. The used filters show a trend of stiffness degradation, which was related to the filter's exposure time. Damage detection procedures using modal strain energy and finite-elementsimulation were studied for detection of a localized damage in the candle filter. The location and the size of the damaged section can be identified using the measured model strain energy.

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Documento generato il 15/07/20 alle ore 21:31:36