Reply To: Jumping time step in Single Frame Restart simulation

March 25, 2023 at 6:13 am

John Miller

Subscriber

I use single frame restart, therefore the restart database should be the first load step

but the solver output indicates something is wrong. In the 12th step something is changing the time step from 0,1s to 1s

*** ANSYS GLOBAL STATUS ***

TITLE = ConvRadSURF152Test–Thermisch-transient (E5)

ANALYSIS TYPE = TRANSIENT

NUMBER OF ELEMENT TYPES = 5

17120 ELEMENTS CURRENTLY SELECTED. MAX ELEMENT NUMBER = 21920

58666 NODES CURRENTLY SELECTED. MAX NODE NUMBER = 58666

17 COMPONENTS CURRENTLY DEFINED

MAXIMUM LINEAR PROPERTY NUMBER = 2

MAXIMUM REAL CONSTANT SET NUMBER = 4

ACTIVE COORDINATE SYSTEM = 0 (CARTESIAN)

NUMBER OF SPECIFIED CONSTRAINTS = 31087

NUMBER OF SPECIFIED SURFACE LOADS = 3520

CURRENT LOAD CASE = 0 OF 0

LOAD SET = 1

SUBSTEP = 1

TIME/FREQ = 0.10000

INITIAL JOBNAME = file

CURRENT JOBNAME = file

RESTART PROCEDURE RE-BUILDS BOUNDARY CONDITIONS

AND LOADING INFO UPTO THE CURRENT LOADSTEP

READ ANSYS LOADS DATA FROM FILE= file.ldhi

DELETE SOLID MODEL BOUNDARY CONDITIONS

….

SOLUTION MONITORING INFO IS WRITTEN TO FILE= file.mntr

*** LOAD STEP 11 SUBSTEP 1 COMPLETED. CUM ITER = 11

*** TIME = 1.10000 TIME INC = 0.100000 NEW TRIANG MATRIX

*** RESPONSE EIGENVALUE = 796.3 OSCILLATION LIMIT = 79.63

FINISH SOLUTION PROCESSING

***** ROUTINE COMPLETED ***** CP = 34.109

*** ANSYS GLOBAL STATUS ***

TITLE = ConvRadSURF152Test–Thermisch-transient (E5)

ANALYSIS TYPE = TRANSIENT

NUMBER OF ELEMENT TYPES = 5

17120 ELEMENTS CURRENTLY SELECTED. MAX ELEMENT NUMBER = 21920

58666 NODES CURRENTLY SELECTED. MAX NODE NUMBER = 58666

17 COMPONENTS CURRENTLY DEFINED

MAXIMUM LINEAR PROPERTY NUMBER = 2

MAXIMUM REAL CONSTANT SET NUMBER = 4

ACTIVE COORDINATE SYSTEM = 0 (CARTESIAN)

NUMBER OF SPECIFIED CONSTRAINTS = 31087

NUMBER OF SPECIFIED SURFACE LOADS = 3520

CURRENT LOAD CASE = 0 OF 0

LOAD SET = 1

SUBSTEP = 1

TIME/FREQ = 0.10000

INITIAL JOBNAME = file

CURRENT JOBNAME = file

RESTART PROCEDURE RE-BUILDS BOUNDARY CONDITIONS

AND LOADING INFO UPTO THE CURRENT LOADSTEP

READ ANSYS LOADS DATA FROM FILE= file.ldhi

DELETE SOLID MODEL BOUNDARY CONDITIONS

NUMBER OF NODAL CONSTRAINTS DELETED = 31087

NUMBER OF ELEMENT CONVECTIONS/HEAT FLUXES DELETED = 1760

*** NOTE *** CP = 34.953 TIME= 06:49:36

The number of results set on the restart command is the last set on the

RTH file. No updating for the RTH file is required.

STEP BOUNDARY CONDITION KEY= 1

REFERENCE TEMPERATURE= 0.000 (TUNIF= 25.000)

INERTIA RELIEF KEY= 0

UNIFORM TEMPERATURE SET TO 25.0000000

ACEL= 0.0000 0.0000 0.0000

OMEGA= 0.0000 0.0000 0.0000

DOMEGA= 0.0000 0.0000 0.0000

CGLOC= 0.0000 0.0000 0.0000

CGOMGA= 0.0000 0.0000 0.0000

DCGOMG= 0.0000 0.0000 0.0000

SPECIFIED CONSTRAINT TEMP FOR SELECTED NODES 1 TO 1 BY 1

REAL= 30.0000000 IMAG= 0.00000000

SPECIFIED CONSTRAINT TEMP FOR SELECTED NODES 2 TO 2 BY 1

REAL= 30.0000000 IMAG= 0.00000000

…

SPECIFIED CONSTRAINT TEMP FOR SELECTED NODES 47685 TO 47685 BY 1

REAL= 70.0000000 IMAG= 0.00000000

SPECIFIED CONSTRAINT TEMP FOR SELECTED NODES 47686 TO 47686 BY 1

REAL= 70.0000000 IMAG= 0.00000000

NONE SELECT FOR ITEM=NODE COMPONENT=

IN RANGE 1 TO 58666 STEP 1

0 NODES (OF 58666 DEFINED) SELECTED BY NSEL COMMAND.

NONE SELECT FOR ITEM=ELEM COMPONENT=

IN RANGE 1 TO 21920 STEP 1

0 ELEMENTS (OF 17120 DEFINED) SELECTED BY ESEL COMMAND.

*** WARNING *** CP = 36.891 TIME= 06:49:38

Entity 100 is undefined. The ESEL command is ignored.

*** ANSYS – ENGINEERING ANALYSIS SYSTEM RELEASE 2021 R2 21.2 ***

Ansys Mechanical Enterprise Academic Teaching

00000000 VERSION=WINDOWS x64 06:49:39 MAR 25, 2023 CP= 37.094

ConvRadSURF152Test–Thermisch-transient (E5)

*** WARNING *** CP = 37.109 TIME= 06:49:39

Material number 5 (used by element 20161) should normally have at least

one MP or one TB type command associated with it. Output of energy by

material may not be available.

*** ANSYS – ENGINEERING ANALYSIS SYSTEM RELEASE 2021 R2 21.2 ***

Ansys Mechanical Enterprise Academic Teaching

00000000 VERSION=WINDOWS x64 06:49:39 MAR 25, 2023 CP= 37.375

ConvRadSURF152Test–Thermisch-transient (E5)

SOLUTION MONITORING INFO IS WRITTEN TO FILE= file.mntr

*** LOAD STEP 12 SUBSTEP 1 COMPLETED. CUM ITER = 12

*** TIME = 2.10000 TIME INC = 1.00000 NEW TRIANG MATRIX

*** RESPONSE EIGENVALUE = 1298. OSCILLATION LIMIT = 1298.

FINISH SOLUTION PROCESSING

***** ROUTINE COMPLETED ***** CP = 39.297

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