Flexcom > Data Inputs > $LIFETIME FATIGUE

This section corresponds to LifeTime Mode 1. LifeTime is an ancillary module to Flexcom which performs time domain fatigue analysis (Mode 1) and general cycle counting (Mode 2). Refer to Fatigue Analysis (Mode 1) for further details.

This section contains the following keywords:

•*BINS is used to specify bins or divisions for histogram output.

•*FATIGUE DATA is used to assign fatigue data to hot spot sets.

•*HISTOGRAM DATA is used to specify histogram options for hot spots.

•*HOT SPOT SETS is used to define the fatigue analysis hot spots - these are the locations on the structure for which fatigue life estimates are required

•*NAME is used to specify a title for a LifeTime analysis run.

•*PDF is used to specify the probability density function to be used in calculating fatigue life estimates from stress spectra.

•*PROPERTIES is used to assign effective structural properties to hot spot sets for use in calculating stresses.

•*SEASTATE FILES is used to specify the names, and corresponding percentage occurrences, of the Flexcom simulations on which the LifeTime calculations are to be based.

•*S-N CURVE is used to define fatigue analysis S-N curves.

•*SOURCE TYPE is used to indicate the type of data storage file you wish to use as input to the fatigue analysis.

•*TD OPTIONS is used to specify a number of miscellaneous parameters, many of which relate to the calculation of stress spectra.