A Method to Detect and Assess Damage in Beams based on Frequency Changes

Gillich, Gilbert-Rainer; Praisach, Zeno-Iosif; Amariei, Daniel

doi:10.4203/ccp.99.77

Cited by 2 publications

(1 citation statement)

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“…In accordance with developed method of authors [11][12][13][14][15], for damage location there is no necessary to know the damage severity. The relation which expressing the natural frequencies f i-D for a beam with a discontinuity in form of closed crack of depth a placed at distance x c from the beam end is:…”

Section: Damage Locationmentioning

confidence: 99%

Evaluation of Crack Depth in Beams for Known Damage Location Based on Vibration Modes Analysis

Praisach

Gillich

Protocsil

et al. 2013

AMM

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The paper presents a method to assess the crack depth in beams for which the damage location is known. Previous researches lead us to a method to identify damage locations in beams, based on a relation providing frequency changes in respect to damage location and depth. Separating the two variables it is possible to find first the damage location, and afterwards to derive the term controlling the severity. Comparing it with values indicating the frequency shift in respect to damage depth, the severity can be assessed. The paper presents a relation reflecting this dependency for any cross-section type, involving the static deflection for the healthy and damaged beam alone; it has a general character, being not influenced by the cross-section shape.

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