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Efficient matrix randomisation methodology for reduced spacecraft models in stochastic FEM-BEM vibroacoustc problems

Yotov, Vladimir, Remedia, Marcello, Aglietti, Guglielmo and Richardson, G (2018) Efficient matrix randomisation methodology for reduced spacecraft models in stochastic FEM-BEM vibroacoustc problems In: European Conference on Spacecraft Structures, Materials & Environmental Testing (ECSSMET 2018), 28 May - 1 June 2018, Noordwijk, The Netherlands.

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Abstract

In this paper, the mathematical framework for a computationally efficient stochastic finite element method (FEM) is outlined. It is devised for a range of applications in structural dynamics, where uncertainties need to be reliably dealt with in the context of reduced model formulations. It allows random mass and stiffness matrices to be robustly generated at the subsystem level in component mode synthesis (CMS) applications. The technique is validated for the particularly challenging case of mid-frequency FEM-FEM vibroacoustic analysis of a spacecraft structure. Results are compared against both test data and full parametric Monte-Carlo simulation. Finally, the method’s applicability to coupled vibroacoustic problems utilising hierarchical matrix boundary element method (BEM) acoustic formulations is evaluated.

Item Type: Conference or Workshop Item (Conference Paper)
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
NameEmailORCID
Yotov, Vladimirv.yotov@surrey.ac.uk
Remedia, Marcellom.remedia@surrey.ac.uk
Aglietti, Guglielmog.aglietti@surrey.ac.uk
Richardson, G
Date : 28 April 2018
Depositing User : Melanie Hughes
Date Deposited : 28 Jun 2018 13:42
Last Modified : 28 Jun 2018 13:42
URI: http://epubs.surrey.ac.uk/id/eprint/848622

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