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Time domain modelling of aeroelastic bridge decks: a comparative study and an application
Author(s) -
Lazzari Massimiliano
Publication year - 2005
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/nme.1238
Subject(s) - aeroelasticity , airfoil , aerodynamics , structural engineering , benchmark (surveying) , bridge (graph theory) , time domain , domain (mathematical analysis) , computer science , mathematics , engineering , mathematical analysis , aerospace engineering , geology , medicine , geodesy , computer vision
This paper has the purpose of describing, developing and comparing the formulae of aeroelastic forces in the time domain for the aerodynamic study of bridges. In particular, it considers the ‘ quasi‐steady ’ formulation and the formulation ‘ derived from the extension of aeroelastic derivatives to the time domain ’ with the use of the recursive expression for the memory term. Both formulae are then applied to the analysis of ‘ stress ribbon ’ pedestrian bridges, aerodynamically similar to a thin airfoil immersed in a fluid. The thin airfoil theory is described and then extended to general coverage of bridge dynamics in order to identify the essential aeroelastic coefficients and derivatives. Different formulae are also compared with simplified theory of the aeroelastic issue frequency domain. Finally, this comparison, the obtained results and all input data are recorded and can be used as a possible benchmark for other theoretical formulations. Copyright © 2005 John Wiley & Sons, Ltd.