Learning Forum

[riteshnw]

Hello all,

I am trying to do the ANSYS static structural simulation on my assembly component.

And it is showing error. I have used mesh size for wings= 3mm and for ring= 10mm.

Meshing is done properly but when I start the simulation it doesn't solve.

The assembly is underground and it is surrounded by the wooden pellets and working condition is 40 degrees celsius.

I want to check for the deflection and stresses produced in the components while removing from the ground having wooden pellets.

[peteroznewman]

Please provide a lot more detailed information and insert some images to show your model, the BCs and Loads, the Analysis Settings and the error.

[riteshnw]

the error is:

An unknown error occurred during solution.  Check the Solver Output on the Solution Information object for possible causes.

Warning:

At least one body has been found to have only 1 element in at least 2 directions along with reduced integration.  This situation can lead to invalid results.  Consider changing to full integration element control or meshing with more elements.  Refer to Troubleshooting in the Help System for more details.

[peteroznewman]

You are using a very old version of ANSYS.  Release 14 doesn't have the improvements that went in over the last 6 years to make it easy to resolve problems. For example, in the current version there is a menu pick to Show Bodies with 1 element in 2 directions.  I don't know if that is available in Release 14. Please try to upgrade to the latest version.

You will have to go through your model, body-by-body until you find the long thin body that has only 1 element in 2 directions, and add a mesh control to make sure that there are at least 2 elements across the thickness. Then try to solve again.

 

[riteshnw]

Ok. Thank you Peter.

I will upgrade my ansys version and will try one more time.

[riteshnw]

Dear all,

Now I am having these two errors after starting to solve the simulation:

1. At least one body has been found to have only 1 element in at least 2 directions along with reduced integration.  This situation can lead to invalid results or solver pivot errors.  Consider changing to full integration element control or meshing with more elements.  Offending bodies can be identified by Right-clicking in the Geometry window and choose Go To -> Bodies With One Element Through the Thickness.  Refer to Troubleshooting in the Help System for more details.

2. One or more bodies may be underconstrained and experiencing rigid body motion. Weak springs have been added to attain a solution.  Refer to Troubleshooting in the Help System for more details.

[peteroznewman]

1. Offending bodies can be identified by Right-clicking in the Geometry window and choose Go To -> Bodies With One Element Through the Thickness.  Notice how much more helpful this warning is compared with the old release.

2. This is a warning, not an error, and may have nothing to do with the reason why the model failed to solve.

The error message tells you to look at the Solver Output. Click on the Solution Information folder under the Solution branch of the outline. The first line has a pull down, and Solver Output is one choice, and is the default.  There will be a long text file in the main window. Crtl-F will allow you to search for the word error and see what it says.

[riteshnw]

Following is the data inside text file.

 

*** NOTE ***                            CP =       0.484   TIME= 14:00:21
 The /CONFIG,NOELDB command is not valid in a Distributed ANSYS         
 solution.  Command is ignored.                                         

 *GET  _WALLSTRT  FROM  ACTI  ITEM=TIME WALL  VALUE=  14.0058333   

 TITLE=
 H-EX.0--Static Structural (A5)                                               


 SET PARAMETER DIMENSIONS ON  _WB_PROJECTSCRATCH_DIR
  TYPE=STRI  DIMENSIONS=      248        1        1

 PARAMETER _WB_PROJECTSCRATCH_DIR(1) = RITESHMS Study MaterialWorkspaces-20190324T131209Z-001Workspaces-20190324T131209Z-001_ProjectScratchScr1A86

 SET PARAMETER DIMENSIONS ON  _WB_SOLVERFILES_DIR
  TYPE=STRI  DIMENSIONS=      248        1        1

 PARAMETER _WB_SOLVERFILES_DIR(1) = RITESHMS Study MaterialWorkspaces-20190324T131209Z-001Workspaces-20190324T131209Z-001H-EX.0_filesdp0SYSMECH

 SET PARAMETER DIMENSIONS ON  _WB_USERFILES_DIR
  TYPE=STRI  DIMENSIONS=      248        1        1

 PARAMETER _WB_USERFILES_DIR(1) = RITESHMS Study MaterialWorkspaces-20190324T131209Z-001Workspaces-20190324T131209Z-001H-EX.0_filesuser_files
 --- Data in consistent NMM units. See Solving Units in the help system for more

 MPA UNITS SPECIFIED FOR INTERNAL   
  LENGTH      = MILLIMETERS (mm)
  MASS        = TONNE (Mg)
  TIME        = SECONDS (sec)
  TEMPERATURE = CELSIUS (C)
  TOFFSET     = 273.0
  FORCE       = NEWTON (N)
  HEAT        = MILLIJOULES (mJ)

 INPUT  UNITS ARE ALSO SET TO MPA

 *** ANSYS - ENGINEERING ANALYSIS SYSTEM  RELEASE 2019 R1          19.3     ***
 DISTRIBUTED ANSYS Mechanical Enterprise                      

 00000000  VERSION=WINDOWS x64   14:00:21  MAY 02, 2019 CP=      0.546

 H-EX.0--Static Structural (A5)                                               



          ***** ANSYS ANALYSIS DEFINITION (PREP7) *****
 *********** Nodes for the whole assembly ***********
 Database allocation failed  idbptr=      6448218240  nPageInCore=       16384  -db       -2048 set

 *** ERROR ***                           CP =      49.484   TIME= 14:021
 An unexpected error ( SIG$SEGV ) has occurred...  ANSYS internal data  
 has been corrupted.  ANSYS is unable to recover and will terminate.    
 Previously saved files are unaffected.  Please send the data leading   
 to this operation to your technical support provider, as this will     
 allow ANSYS, Inc to improve the program.                               

 Current ANSYS Traceback:
     ndputList_mp                   
     ndputList                      
     nblock-store                   
     nblock                         
     pr7nod                         
     prep7                          
     prepcl                         
     ANSYS
 
 ERROR: Slave process(es) with rank(s) 1 have encountered a FATAL error.
 The information below was gathered from the file*.out output file(s).
 Please review the slave process output file(s) listed below for more
 details on this error.
 
 
 Slave Process Output File .file1.out:
 
 *** FATAL ***                           CP =       0.312   TIME= 14:024
 Check processor 0 (master) for error message(s).                        

[peteroznewman]

Database allocation failed  idbptr=      6448218240  nPageInCore=       16384  -db       -2048 set

That is saying the computer does not have enough RAM to run this model.

Please reply with your computer specs. 

[riteshnw]

 I have 8 GB ram in my computer.

[peteroznewman]

Your computer has 2 cores. Maybe ANSYS 2019R1 defaults to 4 cores?

In Mechanical, find the menu that has Solve Process Settings and open that.

Click on the Advanced Button.

Where it says Number of Cores, type 2.

Did that help?

[riteshnw]

Should I change all the 3 values? If yes, which value should I enter?

[peteroznewman]

Just change the Processors.  But this is the Options window from the Workbench program. 

I was talking about the Mechanical program.

Tools > Solve Process Settings > My Computer > Advanced.  You get a different window.

[riteshnw]

No. it does not work. It again shows the same error.

The things you said were already default.

And I also tried to change my GPU acceleration to AMD Radeon but it does not show AMD Radeon, instead it shows NVIDIA.

and the solution information data:

 

   *****  ANSYS COMMAND LINE ARGUMENTS  *****
  BATCH MODE REQUESTED (-b)    = NOLIST
  INPUT FILE COPY MODE (-c)    = COPY
  DISTRIBUTED MEMORY PARALLEL REQUESTED
       2 PARALLEL PROCESSES REQUESTED WITH SINGLE THREAD PER PROCESS
    TOTAL OF     2 CORES REQUESTED
  INPUT FILE NAME              = RITESHMS Study MaterialWorkspaces-20190324T131209Z-001Workspaces-20190324T131209Z-001_ProjectScratchScrA016dummy.dat
  OUTPUT FILE NAME             = RITESHMS Study MaterialWorkspaces-20190324T131209Z-001Workspaces-20190324T131209Z-001_ProjectScratchScrA016solve.out
  START-UP FILE MODE           = NOREAD
  STOP FILE MODE               = NOREAD

 RELEASE= 2019 R1              BUILD= 19.3      UP20181204   VERSION=WINDOWS x64
 CURRENT JOBNAME=file0  115:23  MAY 03, 2019 CP=      0.515


 PARAMETER _DS_PROGRESS =     999.0000000   

 /INPUT FILE= ds.dat  LINE=       0



 *** NOTE ***                            CP =       0.718   TIME= 115:25
 The /CONFIG,NOELDB command is not valid in a Distributed ANSYS         
 solution.  Command is ignored.                                         

 *GET  _WALLSTRT  FROM  ACTI  ITEM=TIME WALL  VALUE=  11.5902778   

 TITLE=
 H-EX.0--Static Structural (A5)                                               


 SET PARAMETER DIMENSIONS ON  _WB_PROJECTSCRATCH_DIR
  TYPE=STRI  DIMENSIONS=      248        1        1

 PARAMETER _WB_PROJECTSCRATCH_DIR(1) = RITESHMS Study MaterialWorkspaces-20190324T131209Z-001Workspaces-20190324T131209Z-001_ProjectScratchScrA016

 SET PARAMETER DIMENSIONS ON  _WB_SOLVERFILES_DIR
  TYPE=STRI  DIMENSIONS=      248        1        1

 PARAMETER _WB_SOLVERFILES_DIR(1) = RITESHMS Study MaterialWorkspaces-20190324T131209Z-001Workspaces-20190324T131209Z-001H-EX.0_filesdp0SYSMECH

 SET PARAMETER DIMENSIONS ON  _WB_USERFILES_DIR
  TYPE=STRI  DIMENSIONS=      248        1        1

 PARAMETER _WB_USERFILES_DIR(1) = RITESHMS Study MaterialWorkspaces-20190324T131209Z-001Workspaces-20190324T131209Z-001H-EX.0_filesuser_files
 --- Data in consistent MKS units. See Solving Units in the help system for more

 MKS UNITS SPECIFIED FOR INTERNAL   
  LENGTH        (l)  = METER (M)
  MASS          (M)  = KILOGRAM (KG)
  TIME          (t)  = SECOND (SEC)
  TEMPERATURE   (T)  = CELSIUS (C)
  TOFFSET            = 273.0
  CHARGE        (Q)  = COULOMB
  FORCE         (f)  = NEWTON (N) (KG-M/SEC2)
  HEAT               = JOULE (N-M)

  PRESSURE           = PASCAL (NEWTON/M**2)
  ENERGY        (W)  = JOULE (N-M)
  POWER         (P)  = WATT (N-M/SEC)
  CURRENT       (i)  = AMPERE (COULOMBS/SEC)
  CAPACITANCE   (C)  = FARAD
  INDUCTANCE    (L)  = HENRY
  MAGNETIC FLUX      = WEBER
  RESISTANCE    (R)  = OHM
  ELECTRIC POTENTIAL = VOLT

 INPUT  UNITS ARE ALSO SET TO MKS

 *** ANSYS - ENGINEERING ANALYSIS SYSTEM  RELEASE 2019 R1          19.3     ***
 DISTRIBUTED ANSYS Mechanical Enterprise                      

 00000000  VERSION=WINDOWS x64   115:25  MAY 03, 2019 CP=      0.749

 H-EX.0--Static Structural (A5)                                               



          ***** ANSYS ANALYSIS DEFINITION (PREP7) *****
 *********** Nodes for the whole assembly ***********
 Database allocation failed  idbptr=      6448218240  nPageInCore=       16384  -db       -2048 set

[peteroznewman]

I opened a New Discussion to ask this specific question.

[MangeshANSYS]

Hello Ritesh,

Are you running into the error for just this model or all the models?

For test purposes, Can you create a very simlpe test case say a box or cylinder geometry, Linear static, one fixed support and one force, then save the project to say c:temp and run it.

If that works then for your other project please save the project to a simple path without any spaces in the path or folder name

i.e. instead of

RITESHMS Study MaterialWorkspaces-20190324T131209Z-001Workspaces-20190324T131209Z-001

 

use below to save project

RITESHtemp

RITESHMS_Study_MaterialWorkspaces-20190324T131209Z-001Workspaces-20190324T131209Z-001

 

see if that helps

[Craig Rothschild]

[Craig Rothschild]

Workbench - Warning

At least one body has been found to have only 1 element in at least 2 directions along with reduced integration. This situation can lead to invalid results or solver pivot errors.

Consider changing to full integration element control or meshing with more elements. Offending bodies can be identified by Right-clicking in the Geometry window and choose Go To -> Bodies With One Element Through the Thickness. Refer to Troubleshooting in the Help System for more help