Bulk Data Entry Defines a loading sequence for a Fatigue Analysis.


(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
FID1 N1/T1 FID2 N2/T2 FID3 N3/T3 FID4 N4/T4
FID5 N5/T5


Field Contents SI Unit Example
ID Each FATSEQ card must have a unique ID. FATSEQ Subcase Information Entry may reference this identifier. Alternatively, this ID may be referenced by other FATSEQ definitions.

No default (Integer > 0)

FID# Identification number of FATSEQ or FATEVNT entry. 2

No default (Integer > 0)

N# Number of times this loading sequence or event is repeated. Repeat number (N#) has no effect on the results of a Factor of Safety (FOS) analysis.

For Sine-Sweep Fatigue Analysis, N# represents the number of sweeps of the corresponding FID# reference.

Default = 1 (Integer > 0)

T# Total Exposure time of the initial source in the Random Loading Sample. 3

For Sine-Sweep Fatigue Analysis, T# represents the time in seconds, if only a single frequency is considered (or sweep rate is set to 0.0).

Default = 1.0 (Real > 0.0)


  1. Identification numbers of FATSEQ and FATEVNT entries share the same ID pool.
  2. Typically, a fatigue subcase should reference the same subcase types through FATSEQ and FATEVNT entries. Some exceptions are listed in FATEVNT, comment 3.
  3. The total exposure time is defined for individual FATEVNT’s using the corresponding T# fields.
  4. This card is represented as a load collector in HyperMesh.