Optimization design of damage resistance for rivet stiffened plate with crack

An optimization design method of damage resistance is presented for rivet stiffened plate with crack, which based on the analytical solution of the stress intensity factor (SIF). The effect of location of stringers and their cross section dimension on the SIF is also considered. During the optimal process, the analytical model is converted to virtual object function, and then the optimal structure parameters of minimizing the stress intensity factor are obtained with exterior point SUMT on the basis of the BFGS method. The damage resistance of the plate is improved. Numerical example shows that the proposed method is validity and effective.