Use of the Explicit High-Order Perturbation Formulation

The explicit high-order perturbation formulation previously developed by Gandini has been tested on cases of practical interest. In particular, a method and a code to calculate the higher mode functions have been developed. The examples considered demonstrate the feasibility and the possibilities of the formulation. A comparison with the results obtained by the first-order theory method shows a better agreement with the ones obtained by direct calculations, particularly when large material changes are involved.