Memorias de investigación
Artículos en revistas:
A sample-based approach to estimate the dynamic loads of components with nonlinear uncertain interfaces
Año:2019
Áreas de investigación
  • Ingeniería mecánica, aeronaútica y naval
Datos
Descripción
Predicting aircraft dynamics and vibration loads at components? interfaces is a key task for ensuring a robust design and development of the product. Usually, whereas in the case of isolate components the dynamic behavior can be predicted quite accurately, when several components are assembled through discontinuous junctions the predictiveness of a model decreases. The junctions, whose mechanical properties are seldom well characterized experimentally, often introduce nonlinearities in the loads? path. Additionally, their behavior is intrinsically uncertain and as a consequence, the dynamic response of the connected structures becomes stochastic. We propose a sample-based approach which aims to cope with both aspects, nonlinearities and uncertainties, and can be split in two main tasks. First, the computational cost of each deterministic simulation is minimized considering that the global nonlinear behavior depends on localized sources of nonlinearities at the interfaces. Second, the uncertainties are propagated through the model by a non-intrusive method based on Sobol?s low discrepancy design. Attention is paid to the global sensitivity indices, which are estimated by creating a meta-model based on Polynomial Chaos Expansion. An industrial application considering an aircraft component whose dynamic behavior is affected by uncertain free-plays at its interfaces is presented.
Internacional
Si
JCR del ISI
Si
Título de la revista
Aerospace Science And Technology
ISSN
1270-9638
Factor de impacto JCR
4,499
Información de impacto
Volumen
87
DOI
Número de revista
Desde la página
369
Hasta la página
378
Mes
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Participantes
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  • Creador: Departamento: Ingeniería Mecánica