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The low-frequency r...
The low-frequency reflection and scattering of the S0 Lamb mode from a circular through-thickness hole in a plate: Finite Element, analytical and experimental studies
- Article/chapterEnglish2002
Publisher, publication year, extent ...
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Acoustical Society of America (ASA),2002
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LIBRIS-ID:oai:research.chalmers.se:da9f3a68-c850-4a0b-8145-d44eeaf6e0d8
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https://doi.org/10.1121/1.1512292DOI
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https://research.chalmers.se/publication/176967URI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:art swepub-publicationtype
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Subject category:ref swepub-contenttype
Notes
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A study of the interaction of the S0 Lamb wave with a circular through-thickness hole in a plate is presented. The study is limited to the nondispersive frequency range of this wave, in which the distributions of stress and displacement are simple. This allows a Finite Element analysis to be undertaken using a two-dimensional membrane discretization. Predictions of the direct reflection of the S0 mode and the lateral scattering of the SH0 mode are made for a range of diameters of the hole. At the same time, an analytical solution based on modal superposition is developed, and this is also used to predict the reflection and scattering coefficients. Both sets of predictions are validated by experimental measurements. It is found that the trends of the reflection coefficients for different hole diameters, frequencies and distances from the hole satisfy a simple normalization. On a detailed scale, the functions exhibit undulations which are shown to result from the interference of the direct reflection with secondary reflections which arrive slightly later.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
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Grahn, Thomas,1973Chalmers tekniska högskola,Chalmers University of Technology
(author)
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Boström, Anders E,1951Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)anbo
(author)
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Cawley, Peter
(author)
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Lowe, M J S
(author)
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Chalmers tekniska högskola
(creator_code:org_t)
Related titles
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In:Journal of the Acoustical Society of America: Acoustical Society of America (ASA)112:6, s. 2589-26011520-85240001-4966
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