Fatigue is a software utility that reads a series of Crunch rainflow files and, using a Rayleigh distribution for wind speed, calculates cumulative fatigue spectra and damage-equivalent loads.

Fatigue exists only temporarily until its features are included in Crunch. No documentation exists.  Please use the WP15_TrbPwrCrv.ftg file in the CertTest folder of the archive as an example input file.  You must specify ES11.3 format for Crunch output to make it work with Fatigue.

You may download the following files from our server:

• Fatigue Change Log (v1.00b-mlb, 0 KB, 09-February-2005)

  This is a list of changes made to the code.  Look at this text file to see if we've made worthwhile changes since you received your previous version of Fatigue.

• Fatigue Archive (v1.00b-mlb, 386 KB, 03-May-2005)

  This is a self-extracting archive of Fatigue.  It contains the Fatigue executable file, sample input files, and change log.  It runs on all 32-bit Windows® platforms.  We created the executable file with Intel Visual Fortran® w_fc_pc_8.0.050_pe052.1.

If you want to refer to the Fatigue website in a report, here is a reference you can use:

NWTC Design Codes (Fatigue by Marshall Buhl).  http://wind.nrel.gov/designcodes/postprocessors/fatigue/.  Last modified 26-May-2005; accessed 26-May-2005.