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ESR9: Structured and unstructured uncertainty effects PhD Position at Università degli Studi di Napoli "Federico II" (Italy) Joint Doctoral Degree with Ecole Centrale del Lyon (France)
Ecole Centrale de Lyon, Ecully
LTDS
Engineering 
Full Description:

Objectives

For the periodic structures, it will be of great value the classification of the uncertainties to be included in the predictive models. The aim of such definition must be related to the identification of the location, level and nature of imperfections and also their effects on the vibroacoustic response. It is expected to understand how the aleatoric and epistemic uncertainties can be possibly managed in the same models. Models do exist for the analysis of both aleatoric and epistemic uncertainties but the actual aim is to evaluate their incorporation into the analysis of the ‘cell’, which can be done nowadays with wave finite element method or spectral methods. Another point should be to assess if the simulation of the degree of uncertainty should require the simulation of a single cell, numerically interrogated in a cycle, or the simulation of a number of cells in which the uncertainty propagates. The final goal will be to define the robustness of the models with reference to some engineering parameters (for example related to tolerance and uncertainties associated to manufacturing at different scales), when these latters are properly bounded. All the tools, which can provide a further insight of this subtle topic, will be foreseen at analytical, numerical and experimental levels. It is highly probable that the ESR has to develop his/her own tool(s). The benchmark will be defined at the consortium level so that the attention will focused on real structural components which after this study can be better modeled and/or provide better vibroacoustic performance (structural damping and/or acoustic transmission loss). During the activity of the present part of the research the manufacturing issues will not taken directly into proper account but these can provide an important database for quantifying and qualifying the source and the values of uncertainties.

Expected Results: Assessments of uncertainty influences on the vibroacoustic signature of periodic media.



Posted on: 30 May 2016Deadline to apply: 01 September 2016Start Date: 01 October 2016 Duration: 36 months
The Fund category is Mixed Funding and the salary is 35-40k€ annual gross
Doctoral School is Doctoral program in physical and engineering sciences in the Rhône-Alpes Region.

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