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Perspectives on the acceleration of the numerical assessment of flutter and buffeting response of bridge decks
Heremans, Julien; Mayou, Anass; Denoël, Vincent
2021In Papadrakakis, M.; Fragiadakis, M. (Eds.) Proceedings of the 8th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering
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Keywords :
Multiple Timescale Spectral Analysis; Background; Resonant
Abstract :
[en] The critical flutter speed of a bridge deck is the result of an eigen value analysis. However, the progressive growth of the response for sub-critical wind velocities, resulting from the buffeting action of the turbulent wind, is also of major concern to the designers.The complete flutter analysis of a bridge structure therefore requires the repeated analysis of the aeroelastic response for various wind velocities, starting from zero (wind off) to the critical flutter speed. In a spectral approach, each of these analyses is typically based on the heavy integration of the power spectral density of the aeroelastic response. It has been recently found that this integra- tion can be facilitated by a background/resonant decomposition as is commonly implemented in a buffeting-only setting. The paper describes a preliminary work showing that this decompo- sition can be extended to the flutter-and-buffeting configuration. The work is only preliminary since it deals with a single oscillator. However, it shows a massive CPU saving of one to two orders of magnitude, while limiting the error to one percent. This kind of saving is particularly expected to make affordable the analysis of large multi degree-of-freedom structures.
Disciplines :
Civil engineering
Author, co-author :
Heremans, Julien  ;  Université de Liège - ULiège > Département ArGEnCo > Analyse sous actions aléatoires en génie civil
Mayou, Anass ;  Université de Liège - ULiège > Département ArGEnCo > Département ArGEnCo
Denoël, Vincent  ;  Université de Liège - ULiège > Département ArGEnCo > Analyse sous actions aléatoires en génie civil
Language :
English
Title :
Perspectives on the acceleration of the numerical assessment of flutter and buffeting response of bridge decks
Publication date :
2021
Event name :
COMPDYN 20218th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering
Event date :
27-30 June 2021
Audience :
International
Main work title :
Proceedings of the 8th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering
Author, co-author :
Papadrakakis, M.
Fragiadakis, M.
Publisher :
NTUA, Athens, Greece
Peer reviewed :
Peer reviewed
Available on ORBi :
since 16 December 2021

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