Probabilistic margin assessment of aircraft conceptual design using a modified reliability based design optimization methodology

J. Yuan, M. Savill, T. Kipouros, S. Coggon, F. Scarpa

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

1 Citation (Scopus)

Abstract

The work proposes a Modified Reliability Based Design Optimization (MRBDO) methodology for assessing margins assigned to uncertain parameters during the aircraft conceptual design. The MRBDO approach consists in integrating the concept of margins into the traditional RBDO approach to identify optimized aircraft design while considering the constraint of a required confidence level of achieving performance targets. For the overall aircraft design, we consider stretching a civil medium-range aircraft with the uncertainties in structural weight, aerodynamic performance and propulsion system as a case study. The reliability index associated to the range of the aircraft is evaluated from the uncertainties of OWE, L/D and SFC perturbations. The case study shows that this MRBDO method can effectively determine the optimal safety factors of the aircraft design range for a pre-set confidence level. Compared to that using the classical approach, the maximum take-off weight of the aircraft is reduced by 3.3%.

Original languageEnglish
Title of host publicationProceedings of ISMA 2016 - International Conference on Noise and Vibration Engineering and USD2016 - International Conference on Uncertainty in Structural Dynamics
EditorsPaul Sas, David Moens, Axel van de Walle
Place of PublicationBelgium
Pages4463-4477
Number of pages15
ISBN (Electronic)9789073802940
Publication statusPublished - 21 Sep 2016
Event27th International Conference on Noise and Vibration Engineering, ISMA 2016 and International Conference on Uncertainty in Structural Dynamics, USD2016 - Leuven, Belgium
Duration: 19 Sep 201621 Sep 2016

Publication series

NameProceedings of ISMA 2016 - International Conference on Noise and Vibration Engineering and USD2016 - International Conference on Uncertainty in Structural Dynamics

Conference

Conference27th International Conference on Noise and Vibration Engineering, ISMA 2016 and International Conference on Uncertainty in Structural Dynamics, USD2016
Country/TerritoryBelgium
CityLeuven
Period19/09/1621/09/16

Keywords

  • aerodynamics
  • conceptual design
  • structural dynamics
  • reliability
  • uncertainty analysis
  • aero-dynamic performance

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