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How can I retrieve the number of columns that have data stored in them in /POST26?


This is an undocumented feature on the *GET command. You can use:<br><br>*get,par,vari,,nvar<br><br>which will get the number of columns. It is the same as nsets that gets...

I am creating CMS superelements in Simulation using Commands Objects. Why does my expanded superelement solution have stresses but no displacement results?


Please ensure that all nodes and elements are selected before saving the full.db. Otherwise, having a reduced set of nodes selected in the full.db may result in no displacement results for the...

Do I need to specify the Joule constant when inputting energy quantities in a Simulation Commands Object?


Yes. When you input quantities containing the units of Btu/sec in a Simulation Commands Object, you need to multiply them by 9338. The solution is based on units of in-lbs/sec, not Btu/sec.

Why is MATRIX27 mass matrix causing negative definite errors? The mass matrix was created by an external code to simulate surrounding water, and for certain degrees of freedom (DOF), the diagonal is zero.


ANSYS does not allow the diagonal term of a MATRIX27 to be zero and is replacing it with 1e-29. This is so small relative to the very large off-diagonal mass value that it produces the negative...

Is there a limit on the number of PCG iterations that will be done?


Yes, there is a limit of 10,000 iterations in ANSYS 11.0. This is set to avoid endless iterations on an ill-conditioned model. If the solver has not converged within 10,000 iterations, it is...

Why is the temperature non-uniform at a surface that convecting to a temperature-dependent Tbulk?


There is a bug in ANSYS 11.0 (72205) in the evaluation of Tbulk when the table is a function of temperature. It is using the hf evaluation temperature from the previous node in its evaluation,...

KNOWN ISSUE: The CFX-Solver cannot use a working directory with NTFS-based file permissions


SYMPTOM:<br>The CFX-Solver fails with an error similar to:<br><br> Failed to open file cfx5.mms.setup with status NEW and format FORMATTED<br> STOP called from...

Why is ANSYS 11.0 aborting with the error message below when I attempt to do a large-deflection, prestressed modal analysis with a superelement?

ERROR MESSAGE RECEIVED:
*** ERROR *** CP = 1.359 TIME= 16:46:05
Internal check error inside PCG substructure solver.

Sometimes I get the error that over 32 million load vectors have been applied while the maximum is 32.


This is related to defect 58182, which was corrected in ANSYS 12.0.<br><br>The abort was caused by new code added at 11.0 to allow superelements to work with the direct assembly...

The BH data for a magnet provided by my customer doesn't look like a normal BH curve. Could it be based on intrinsic B?


The discussion below can be found at the following link:<br><br><a target=_blank...

Why do stranded coil current density values not match for ANSYS 10.0 and 11.0?


This is due to a change made under defect 55272. At 10.0, the current density was computed based on the gross cross-section of the conductor, including the area contributed by the voids between...

I have a DesignXplorer model that has several hundred What-If design points. On each of those design points, I get a message and it waits for my input before it solves next design point. The machine runs 64-bit Windows XP and has Internet Explorer (IE) 7.


This is a result of having "several hundred design points." Because the UI part of What-If is written with JScript, this makes things slow, and IE (used to render the UI) is just...

Why do convective-surface heat fluxes in Simulation not match hand calculations? My hand calculation is based on the reported surface temperature, the known bulk temperature, and the film coefficient.


The surface heat flux being reported is not really the heat flux at the surface but the heat flux at the centroid of the tetrahedron elements adjacent to the surface. In ANSYS Mechanical APDL, you...

In ANSYS Release 11.0, is there a supported tool that automatically creates 3D singular elements for use with KCALC?


No, the only supported tool for creating singular elements is the KSCON command, which is only applicable to 2D models. An unsupported macro (CTMOPT) was provided with Release 11.0, but it is not...

In ANSYS Release 11.0, are singular elements required when calculating J-integral using the CINT command?


No, singular elements are not required to be used with the CINT command.

Why do the radiosity commands RSYMM/RSURF not work on this 60-degree cyclic model?


These features only work if the sides of the model are planar and radial. The algorithm is internally computing the sector angle incorrectly for the skewed case based on maximum and minimum theta...

In ANSYS Release 12.0, does the BELLOW command account for the change of area when calculating the axial thrust force?


No, the BELLOW command only affects the axial stiffness and bending flexibility of the pipe; it does not affect the cross-sectional area. The axial thrust force is always the internal pressure...

In ANSYS Release 11.0, what coordinate system is used by the PRSECT and PLSECT commands to report linearized stresses?


The coordinate system used by the PRSECT and PLSECT commands to report linearized stresses depends on the dimension of the model.<br><br>For axisymmetric models, the linearized...

In ANSYS Release 11.0, can querying the subgrid identify multiple items at the same location for SHELL181 elements?


Yes, the subgrid query does not operate on the actual model; it operates on the "graphics object." PowerGraphics (/GRAPHICS,POWER) takes the displaced coordinates of the SHELL181...

In the Workbench Fatigue Module at Release 11.0, is it possible to directly enter strain-life curves?


No, the WB Fatigue Module uses the Strain-Life Relation equation, for which you need to enter 6 material parameters. The Fatigue Module uses those parameters to develop the elastic, plastic, and...

In ANSYS Release 11.0, does the CINT command support crack-face pressure?


No, the crack-face pressure is not included in the J-integral calculations. It is expected to be included in Release 12.0.

In WB Simulation Release 11.0, what the maximum allowable points for a PSD curve?


The maximum allowable number of points for a PSD curve is 50. This limitation is controlled by the PSDFRQ command in ANSYS. If more than 50 points are defined, the extra points are...

In ANSYS Release 11.0, what reference temperature is used for the convective film coefficient for PLANE77, SOLID87, and SOLID90?


Per equation 6-7 of the Theory Reference, the convective film coefficient (input using the SF or SFE command) is evaluated at (TB + TS)/2 unless otherwise specified for the...

In the Workbench Fatigue Module at Release 11.0, how can the effect of a load alternating about a static load be evaluated?


The fatigue effect of a combined static and varying load can be modeled using a constant amplitude, non-proportional loading case. The static load creates a mean stress and about which the varying...

In ANSYS Release 11.0, is it possible to automatically create singular element in SHELL elements?


No, the only tool available for automatically generating singular elements is KSCON, which only works with 2D planar elements. Singular SHELL elements must be created using direct generation.

In Workbench Simulation Release 12.0, is it possible to change the size of boundary conditions symbols?


No, the size of the boundary condition symbols is based on the size of the active parts; the user cannot override that setting. The only way to affect the sizing is to activate/hide portions of...