Restart for Fatigue Analysis

An .h3d file containing results from a linear static analysis can be imported into a dummy linear static subcase. A subsequent fatigue analysis subcase can be used to conduct fatigue analysis based on the imported linear static analysis results. The following example illustrates the setup.

ASSIGN,H3DRES,10,linear_static.h3d

SUBCASE         1
  ANALYSIS=STATIC
  IMPORT(SUB=1)=10
SUBCASE        21
  FATDEF   =   100
  FATPARM  =   252
  FATSEQ   =   401
BEGIN BULK

FATSEQ,401
+,501,1   
FATEVNT,501,601
FATLOAD,601,701,1,1.000,5.00,0.0

An .h3d file containing results from the global model (submodeling) can be imported into a dummy local analysis static subcase which contains the corresponding global-local interface setup via SPC/SPCD with the M option for mapping. For more information, see the Global-Local Analysis (Submodeling) User Guide. A subsequent fatigue analysis subcase can be used to conduct fatigue analysis based on the results coming from the local model. The following example illustrates the setup.

ASSIGN,H3DRES,10,global.h3d

SUBCASE         1
  SPC=11
  IMPORT(SUB=1)=10
SUBCASE        21
  FATDEF   =   100
  FATPARM  =   252
  FATSEQ   =   401
BEGIN BULK

FATSEQ,401
+,501,1   
FATEVNT,501,601
FATLOAD,601,701,1,1.000,5.00,0.0
SPC,11,1,123,M
+,GSET
SPC,11,2,123,M
+,GSET

An .h3d file containing results from a frequency response analysis can be imported into a random response subcase. Then a subsequent fatigue analysis subcase can be used to conduct fatigue analysis based on the random response analysis results. The following example illustrates the setup.

ASSIGN,H3DRES,10,frf.h3d

SUBCASE       1
  ANALYSIS=MFREQ
  IMPORT(SUB=1)=10

SUBCASE         2
  ANALYSIS=RANDOM
  RANDOM = 100

SUBCASE       9
    LABEL fatigue
  ANALYSIS FATIGUE
    FATDEF =       13
    FATPARM =      15
    FATSEQ =       23
Begin bulk
FATSEQ,23
+,24,1
FATEVNT,24,22
FATLOAD,22,,2