Vibrational energy distributions in large built-up structures - a wave chaos approach
Lead Research Organisation:
University of Southampton
Department Name: Faculty of Engineering & the Environment
Abstract
Abstracts are not currently available in GtR for all funded research. This is normally because the abstract was not required at the time of proposal submission, but may be because it included sensitive information such as personal details.
Organisations
People |
ORCID iD |
| Emiliano Rustighi (Principal Investigator) |
Publications
Chappell D
(2013)
Discrete flow mapping: transport of phase space densities on triangulated surfaces
in Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
Chappell D
(2012)
Solving the stationary Liouville equation via a boundary element method
Chappell D
(2012)
Boundary element dynamical energy analysis: A versatile method for solving two or three dimensional wave problems in the high frequency limit
in Journal of Computational Physics
Chappell D
(2013)
Solving the stationary Liouville equation via a boundary element method
in Journal of Computational Physics
Chappell DJ
(2011)
Dynamical energy analysis for built-up acoustic systems at high frequencies.
in The Journal of the Acoustical Society of America
Renno J
(2010)
On the forced response of waveguides using the wave and finite element method
in Journal of Sound and Vibration
Renno J
(2011)
Calculating the forced response of two-dimensional homogeneous media using the wave and finite element method
in Journal of Sound and Vibration
| Description | In this project, we developed applications of the wave and finite element (WFE) method. This technique is suitable for modelling general waveguides, which are homogeneous in one dimension, but whose cross-section may have arbitrary complexity, or two-dimensional structures, such as plates and panels, which are homogeneous in two dimensions, but whose properties may vary in an arbitrary manner through the thickness. To resolve the wave behaviour of the whole structure (which can be arbitrarily long/large), the standard FE model of a small segment should be post-processed using periodic structure theory. The advantage of this method is two-folds: the FE model can be obtained using any commercial/in-house FE package and thus the full power of existing codes can be harnessed, and the model to be processed is very small which is computationally advantagoues. During this project, the WFE method was used to efficiently predict the response of structures subjected to time harmonic, arbitrarily distributed loads. It was also used to find the scattering properties of arbitrarily complicated joints, and to describe the vibrational behaviour of structural networks using waves only. These developments will contribute to bridging the mid-frequency gap by increasing the range of applicability of the FE method. Industrial applications included modelling the wave behaviour of a train floor panel, and predicting the resposne of a railcar cross-section. These are large structures, and modelling their vibration withing the audio-frequency range can lead to impractically large models. |
| Exploitation Route | Outcomes of the research are still being developed by researchers and PhD students. The researcher, Dr Jamil Renno, is now working at Doosan Babcock employing the developed methodologies. Inutech (Innovative Numerical Technologies) is also using the technique. |
| Sectors | Aerospace Defence and Marine |
| Description | The researcher employed in the grant, Dr Jamil Renno, is now an employer of Doosan Babcock, where he is applying Wave-FE models to plant integrity. |
| First Year Of Impact | 2015 |
| Sector | Energy,Other |
| Impact Types | Economic |