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Wave propagation in...
Wave propagation in plates studied by pulsed hologram interferometry
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- Wåhlin, Anders (författare)
- Luleå tekniska universitet,Institutionen för teknikvetenskap och matematik
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Fällström, Karl-Evert (författare)
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- Gustavsson, Håkan (författare)
- Luleå tekniska universitet,Strömningslära och experimentell mekanik
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visa fler...
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Molin, Nils-Erik (författare)
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visa färre...
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(creator_code:org_t)
- Bellingham, Wash : SPIE - International Society for Optical Engineering, 1989
- 1989
- Engelska.
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Ingår i: The Sixth Meeting in Israel on Optical Engineering. - Bellingham, Wash : SPIE - International Society for Optical Engineering. ; , s. 146-53
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
Ämnesord
Stäng
- Isotropic and non-isotropic plates are impacted by a ballistic pendulum. The bending waves that are generated are studied with holographic interferometry using a double pulsed ruby laser as light source. The pulse shape changes with time because of the dispersivity of the waves. Initially the fringe pattern in the isotropic case is cylindrically symmetric and determined from an initial value problem. Later, when the waves have reached the plate rim, in- and outgoing waves gradually develop fringe patterns which in the end will be a combination of eigenmodes of the plate. A solution to the corresponding Kirchhoff plate equation is presented, which in the special case when the impact is modelled as a Dirac-pulse in space and time, is shown to depend only of the distance to the impact point divided by the square root of the time after impact and a parameter containing plate parameters. From the slope of the central deflection material parameters can be determined. Another solution, assuming a finite impact time, is shown to agree better with experiments. Results from investigations of non-isotropic materials are also presented.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Teknisk mekanik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Applied Mechanics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)
Nyckelord
- Experimentell mekanik
- Experimental Mechanics
- Strömningslära
- Fluid Mechanics
Publikations- och innehållstyp
- ref (ämneskategori)
- kon (ämneskategori)