Transonic nonlinear aerodynamic force correction method

The transonic nonlinear aerodynamic force correction method comprises the following steps: generating an aerodynamic force influence coefficient matrix AIC and a downwash speed matrix W of all surface elements by adopting a dipole grid method; adopting a steady CFD method to obtain aircraft external flow field speed data, and extracting the downwash speed of each surface element; obtaining an additional angle of attack according to the downwash speed; obtaining an effective angle of attack according to the additional angle of attack; obtaining a corrected downward washing speed according to the effective angle of attack, and further obtaining a downward washing speed correction matrix We; obtaining an AIC conversion matrix Wt according to the downwash speed matrix W and the downwash speed correction matrix We; correcting the AIC by using the Wt to obtain a corrected aerodynamic force influence coefficient matrix AICe; and correcting the aerodynamic force by using the corrected aerodynamic force influence coef