This tutorial will use the results from the model analyzed in the Natural Frequency (Modal) tutorial. If this tutorial has not been completed, an archive of the model with results, Tower Modal Results.ach, is available in the Tutorials\Models subdirectory of the ALGOR installation directory.
A 15 Hz displacement vs. period input spectrum will be applied to the base of the tower.
The input spectrum will be applied equally in all three global directions.
A damping ratio of 0.05 will be used.