Also listed are frequencies from GH Bladed, an industrial software package for wind turbine analysis, that were computed as part of the present investigation. Both ADAMs and GH Bladed have been demonstrated to provide high fidelity for predicting mode frequencies [12] and the frequencies obtained by all these codes are quite close. Compared to NREL’s models, it can be found that Bladed performs well; despite that default values were used for many of the GH Bladed inputs (because some values of the baseline design were not