Structure Dynamics and Acoustics Research Group
New method of damping structural vibrations based on the acoustic black hole effect
The aim of this project is to carry out theoretical and experimental research into the proposed new efficient method of damping structural vibrations based on the specific features of flexural wave propagation and reflection in elastic wedge-like structures of power-law profile.
It has been discovered recently that for power law exponent being equal or larger than two, the incident flexural waves can be captured near the sharp edges of wedge-like structures, i.e. the above structures materialise acoustic 'black holes' for flexural waves. In combination with narrow strips of thin absorbing films attached to the edges, such wedge-like structures can provide very low reflections even in the case of real wedges of non-ideal power-law profile, thus implementing very efficient way of damping resonant flexural vibrations.
In this project, the proposed new method of damping structural vibrations based on the acoustic black hole effect is further developed and investigated. The emphasis in the project is made on the so-called two-dimensional black holes that have not been investigated so far. The results of the project will lead to the development of new non-traditional and efficient ways of damping structural vibrations.
- Funding body
- EPSRC
- Project duration
- 3 years
- Project team (researchers)
- Dr Daniel O'Boy
- Contact
- Professor Victor Krylov
Project outputs / results
- O’Boy, D.J., Krylov, V.V., Kralovic, V. (2010) Damping of flexural vibrations in rectangular plates using the acoustic black hole effect, Journal of Sound and Vibration, 329, 4672–4688.
- O’Boy, D.J., Bowyer, E.P., Krylov, V.V. (2010) Damping of flexural vibrations in thin plates using one and two dimensional acoustic black hole effect, Proceedings of the 10th International Conference on Recent Advances in Structural Dynamics (RASD 2010), Southampton, UK, 12-14 July, 2010, [CD-ROM].
- Bowyer, E.P., O’Boy, D.J., Krylov, V.V., Gautier, F. (2010) Experimental investigation of damping flexural vibrations using two-dimensional acoustic ‘black holes’, Proceedings of the International conference on Noise and Vibration Engineering (ISMA 2010), Leuven, Belgium, 20-22 September 2010 (Ed. P. Sas, B. Bergen), pp. 1181-1192.
- O’Boy, D.J., Krylov, V.V. (2011) Damping of flexural vibrations in circular plates with tapered central holes, Journal of Sound and Vibration, 330, 2220–2236.
- Georgiev, V.B., Cuenca, J., Gautier, F., Simon, L., Krylov, V.V. (2011) Damping of structural vibrations in beams and elliptical plates using the acoustic black hole effect, Journal of Sound and Vibration, 330, 2497–2508.