Computational Fluid Dynamics Based Kriging Prediction on Flutter Derivatives of Flat Steel Box Girders

An investigation on the flutter derivative prediction of flat steel box girders is carried out based CFD simulations. Firstly, by taking girder section Qingshan Yangtze River Bridge as basic and considering its width height design variables cross-section shape, domain shape defined controlling possible variation range variables. A small number cross-sections are selected for calculation aerodynamic forces Secondly, according to lift moment time-histories these girders, which derivatives identified least square method. Next, parameters used inputs, obtained from simulations outputs train Kriging models. To improve accuracy models, a modified method model training presented. Finally, other in predicted using trained verified It feasible directly predict