Time-dependent dynamical energy analysis

Chappell, D.J. ORCID: 0000-0001-5819-0271, 2023. Time-dependent dynamical energy analysis. In: 13th UK Conference on Boundary Integral Methods, University of Aberdeen, 10-11 July 2023.

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Abstract

Dynamical Energy Analysis (DEA) was introduced in 2009 as a novel method for predicting high-frequency acoustic and vibrational energy distributions. In this work we detail how DEA can be reformulated in the time-domain by means of a convolution integral operator and apply the Convolution Quadrature (CQ) method to discretise in time. The CQ method provides a link between the frequency domain and fully time-dependent solutions by means of the Z-transform. The space and momentum variables may be approximated using the same approaches that have previously been implemented in frequency domain DEA. The final result is a fully time-dependent DEA method that can track the propagation of high-frequency transient signals through phase-space.

Item Type:	Conference contribution
Creators:	Chappell, D.J.
Date:	July 2023
Identifiers:	Number Type 1915155 Other
Divisions:	Schools > School of Science and Technology
Record created by:	Laura Ward
Date Added:	19 Jul 2024 15:57
Last Modified:	19 Jul 2024 15:57
URI:	https://irep.ntu.ac.uk/id/eprint/51789

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