How is heat flow considered in ANSYS Workbench Simulation 11.0 contact? |
The attached ANSYS Workbench Simulation 11.0 SP1 example shows that thermal contact gives the total heat flow for asymmetric contact, but divides it up between the two contact surfaces for... |
What environment variables are required by the CADNEXUS Capri geometry interface for CATIA v5? |
For normal installations where the Catia V5 CAD program is installed and configured locally on individual computers, no additional configuration is necessary. The files and information contained... |
######## WORK NOTES COPIED FROM INCIDENT 737168 ########
**** Entered By: zgabraha @ 04/08/2008 03:05 PM ****
Q. How do I display elements that violate shape checking with errors or warnings?
A. Use the ESCHECK command. This can be used to display elements in the preprocessor as well as elements that are distorted during a solution. |
######## WORK NOTES COPIED FROM INCIDENT 737168 ########<br>**** Entered By: zgabraha @ 04/08/2008 03:05 PM ****<br>Q. How do I display elements that violate shape checking with errors... |
When attempting to compile a user Fortran shared library on a Windows machine using the Intel Fortran compiler, a failure occurs with the error message:
ipo: error #11035: Fatal error cannot open ifconsol
(NOTE: The same message may relate to libraries other than ifconsol.) |
<br><br>The most likely cause is that the ifortvars script has not been run prior to running cfx5mkext. It is necessary to run ifortvars every time a new command window has been opened... |
Attempting to use the utility routine USER_GET_GVAR with a boundary only additional variable causes the solver to fail with the error message:
Error in subroutine cal_TAUWALL_TURB :
Called for invalid locale: VERTICES
GETVAR originally called by subroutine CAL_BCP_Aver_IP
Is there a workaround for this? |
<br><br>The problem is fixed in CFX-12.0. A workaround is available for CFX-11.0, which is to use CFX-11.0 Update 2 and an expert parameter setting.<br><br>Firstly, obtain... |
When using CFX 11.0 on Linux/UNIX systems, is it possible to link in extra libraries with user Fortran libraries (e.g. maths libraries)? |
<br><br>This is indeed possible, but first a word of warning: If extra libraries are to be linked in this way, it is important that they are object code compatible with the user... |
When installing ANSYS products on a Windows 64bit machine, the installation semms to hang and will not proceed. What causes this?
What are the steps to allow the installation to finish? |
When ANSYS products are installing, there is a point in the installation where a message is sent<br>to the system to inform all processes of new environment variables that were set. Some... |
I ran a transient analysis and want to see the average velocity for a named nodal selection over the full time of the transient. |
The below commands will produced the desired data.<br><br>*get,dset,active,,set,nset<br>*do,jj,1,dset<br>*if,jj,eq,1,then<br>set,first<br>cmsel,s,name ... |
In a random-vibration analysis, how can I plot the output PSD against input PSD? |
If you calculate the response PSD at the base in absolute terms (DATUM=1), then you essentially have obtained a POST26 variable of the input PSD. Then, you can calculate the response PSD of... |
How to optimize the performance of the ANSYS solver on various platforms: CPU/Memory balance, Hardware, HPC, parallel processing, etc. |
<br>Please see document posted to<br><br><a target=_blank... |
Are there any examples showing how I can get the equivalent properties for my composite laminate defined ply-by-ply with the SECDATA commands and then use those equivalent properties in another analysis? |
Yes, please see the attached ANSYS 11.0 SP1 SHELL181 example.<br><br>The shell section properties are entered ply-by-ply with the "SECTYPE,,SHELL" and... |
A call to getstackdisp causes a segmentation fault as follows.
--------------------------------------------------------------
ERROR MESSAGE RECEIVED:
*** ERROR *** CP = 1.190 TIME= 08:30:58
An unexpected error ( Segmentation Violation ) has occurred... ANSYS
internal data has been corrupted. ANSYS is unable to recover and will
terminate.
--------------------------------------------------------------
Originally I tried to use ndspgt which failed, so I was advised to use getstackdisp instead. |
GetStackDisp only works in solution (/SOLU) and only after the 1st SOLVE command.
|
Are there any examples of interference fit problems using CONTA178 Elements? |
Yes, please see the ANSYS 11.0 SP1 example attached. It is an updated version of Knowledge Base Solution 4978, which had used CONTAC12 elements. The reference used is SHIGLEY, "MECHANICAL... |
In Simulation 11, can I apply a PSD load in non-Cartesian direction? I see the drop-down menu in the Details window to specify acceleration direction, but the only options are X, Y, and Z. |
You could use a command object to align the nodal coordinate system with the direction you would like to apply the load. Please see the attached example.
|
Trying to import a file into classic ANSYS and gets "file replace.anf does not exist".
ANSYS 11.0 output window has the following information:
'ButchUsersjvanrynMy Adept WorkAreaPower Ring JVRAnsys'
CMD.EXE was started with the above path as the current directory.
UNC paths are not supported. Defaulting to Windows directory.
'ac4para110.bat' is not recognized as an internal or external command,
operable program or batch file.
Why is the user not able to import this Parasolid file? |
The UNC path was indeed the problem. He was able to import the part if his working directory was on a local drive or a mapped drive.
|
I have a user fortran routine that includes a call to USER_GET_MESHDATA.
This worked fine in 10.0, but in 11.0, I get the following error:
GCNTRL stacktrace
1 USER_GET_MESHDATA,VolEl
What is the problem? |
<br><br><br>The documentation for USER_GET_MESHDATA notes that the action can be set to either 'RETURN' or 'RELEASE'.<br><br>In 11.0,... |
Are there any examples that show how to enter orthotropic wood material data for both implicit and explicit shell elements and how the Poisson's ratios are handled? |
Yes, please see the attached input file created in ANSYS 11.0 SP1 for both SHELL181 (ANSYS implicit) and SHELL163 (ANSYS LS-DYNA explicit) elements.<br><br>Wood property data from the... |
Are there any examples of ANSYS LS-DYNA tiebreak surface-to-surface contact? |
Yes, please see the attached ANSYS LS-DYNA 11.0 TSTS contact input file. Two blocks are glued together and then dropped onto the floor. The impact causes the bond to fail and the blocks... |
Q. I need to specify the partition mode as "User specified direction" of "1 0 0". I can do this in using the CFXSolver GUI mode, but I don't know how to define it when running the CFX solver from the command line.
How can I input the partition information through the command line?
A. This must be done by having the cfx5solve command read a CCL file. It is possible to invoke some of the methods by putting in the flag 'part-mode <mode>, where <mode> is one of the methods. The User Direction method cannot be invoked in that fashion.
An example CCL file (userDirPart.ccl) should contain:
EXECUTION CONTROL:
PARTITIONER STEP CONTROL:
PARTITIONING TYPE:
Option = User Specified Direction
Partitioning Direction = 1.0,0.0,0.0
END
END
END
An example command line syntax would then be:
cfx5solve -def <mydefile> -part 2 -ccl userDirPart.ccl
You can see a full list of the cfx5solve command line options by typing:
cfx5solve -help |
Q. I need to specify the partition mode as "User specified direction" of "1 0 0". I can do this in using the CFXSolver GUI mode, but I don't know how to define... |
Are there any examples showing how to plot the axial and shear forces in ANSYS LS-DYNA spot welds? |
Yes, please see the attached ANSYS LS-DYNA 11.0 SP1 example that shows how to use the LSTC postprocessor "LS-PREPOST" to plot the axial, shear, and resultant spot weld forces... |
A model from Workbench Simulation 11.0 is brought into ANSYS Classic and it fails with a constraint equation error unless NSUBST,1,1,1 is used:
*** FATAL *** CP = 9.438 TIME= 18:35:24
A term of constraint equation 13 is not defined, most likely due to a
displacement constraint on this or an adjoining constraint equation.
The model has MPC contact, but the nodes are not restrained via the D command, and there are no constraint equations in the model (other than the internal ones from the MPC contact). It seems running a
nonlinear analysis causes the MPC contact to fail, but it works for a linear analysis. Is this a known error? |
Yes, Defect 65275 was filed and corrected in the 12.0BETA UP20080229 build of ANSYS. Development noted the following about the error:<br><br>The error was due to the way we were... |
Is there a way to define a Monitor Point in CFX-Pre based on its node number and then track a variable at this node? |
<br>Yes, it is possible to do this. There's a CCL only feature that allows you to attach a Monitor Point to a particular node. It is a beta feature in version 11.0. The CCL... |
Is there a way to compute only the wetted area of a body in a free surface calculation? By wetted, I mean where the volume fraction > 0.5. |
<br><br>Yes, the wetted area of a body is equal to:<br><br>areaInt(Water.Volume Fraction)@Body<br><br>You can calculate this in CFX-Post through the function... |
Are there any examples showing how to find the acceleration at any given node (not at a vertex) in an ANSYS Workbench Simulation harmonic response analysis? |
Yes, please see the attached ANSYS Workbench Simulation 11.0 SP1 MSUP harmonic response analysis example. The acceleration is just the displacement times the negative of omega squared, and omega... |
I want to use the mesh and pressure from Fluent as a starting point for a static structural analysis in ANSYS. The imported mesh has only the sides of tetrahedrons and not the solid elements. How can you get a mesh with solids from Fluent? The option with ".rfl" files is not available on most type of machines. |
To export the solid mesh, do not select any surfaces. It is the selection of surfaces which causes it to output only the surface mesh. You may have to define the ANSYS element type before reading... |