Based on enough samples obtained by model experiments in wind tunnel, two BP
artificial neural networks (ANNs) were constructed with the MATLAB toolbox of ANN. Then the
two ANNs were used to train static coefficients in two different coordinate systems.i.e.body and
wind coordinate systems, and training results of static coefficients of bridge section in the two
coordinate systems were compared using the Bayesian regularization algorithm. The result shows
that a four-layer network is more efficient and has better accuracy. Finally, some problems to the
application of ANNs to the identification were pointed out.