SiteMap Page 157

Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 Next

Is there a document describing the ANSYS Workbench Fatigue capabilities?

Attached is a document discussing the capabilities of the ANSYS Fatigue module for ANSYS Workbench. It is not a tutorial as there is no beginning-to-end model, but it covers most of the steps in...

When will ADAMS MNF work on a 64 bit OS?

This is supported at 11.0.

Is ANSYS 9.0 SP1 still available for download and, if so, where?

Under the Customer Portal:<br><a target=_blank...

Class 3 Error

The interphase mass transfer rate is inconsistent in how it is applied to the continuity equation compared to the energy equation and the mass imbalance when using the default segregated volume fraction solution method. The mass transfer rate is bounded in the continuity equation but not elsewhere. This can give errors in a converged solution, which may be noticeable in the imbalances.

This is due to the area density not going to zero as the volume fraction goes to zero or one, i.e. away from

WORKAROUND:<br>One workaround is to use the coupled volume fraction solution method. An alternative workaround is to use the expert parameter setting 'interface delta option =...

I cannot choose "Equivalent Plastic Strain" as a result item. My license is Professional NLS, which should not have such a problem. Do you have any suggestion?

This problem was fixed at 11.0SP1. Please upgrade to resolve the issue.

When using MFR interfaces of type 'frozen rotor', 'stage' or 'transient rotor stator' and the direct intersection algorithm obtained using the expert parameter setting 'ggi intersection algorithm =2' , there is the possibility for the flow solver to rule out faces which are possibly not degenerate, i.e. should be intersected but are not. This would lead there to be non-overlap regions on the interface where there should not be. An error message like the following may be obtained:

| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| Floating point exception: Divide by zero |
| |
| |
| |
| |
| |

| Writing crash recovery file |

Details of error:-
Error detected by routine PEEKR

Current Directory : /FLOW/SOLUTION/TSTEP0/CLOOP0/ZN1

The problem is in the detection algorithm for degenerate faces. This algorithm should be comparing the physical (x,y,z) face edge lengths with an element volume length scale, whereas the code currently compares the normalized face edge lengths in cylindrical coordinates (eta,theta) to a physical based element volume length scale.

WORKAROUND:<br>Use the default pixel intersection algorithm, possibly with the expert parameter 'ggi edge scale factor' increased to 1.0E-3.<br><br>FIXED...

How do you calculate the unburnt char in a CFX coal combustion calculation?

<br>Please start the calculation with the option Output Control -> Results -> Extra Output Variables List and choose one variable for every Particle group you defined. Please...

Is the Pro/E Interface supported in Workbench on Windows Vista? The documention for WB 11.0 sp1 indicates that it is not.

Pro/Engineer Wildfire 3.0 and 4.0 are both supported on Windows Vista Business and Ultimate Editions. However, the package we utilize to link Pro/E data (Pro/Toolkit) is only supported for Vista...

When plotting von Mises stress in ANSYS Classic after a PSD analysis, the default (found through trial and error) seems to be using an "AVPRIN,2" setting; however, this doesn't seem to be documented anywhere. Is "AVPRIN,2" using the Segalman-Reese method and why isn't it documented?

PSD uses Segalman-Reese for SIGE. This has nothing to do with "AVPRIN,2."<br><br>"AVPRIN,2" does exist, and it is undocumented. As the command echo notes,...

In the expansion step of modal and CMS analyses, is it possible to select some nodes and expand the obtained mode set to the selected node set (not the full DOF set)?

There is no way to directly do this in the ANSYS program. The expansion of a modal or CMS model will expand the entire DOF set; however, after expansion of the entire model, in /POST1, you can...

In ANSYS, is there a feature similar to the Nastran PLOTEL element? i.e. can I do this by connecting selected nodes using line elements for geometry representation.

The way to emulate the Nastran PLOTEL is to use MESH200 elements with KEYOPT(1)=2. This is a 3D line element with two nodes. You can pick nodes so that you get a "stick figure" for...

Can I use /POST26 to take a time derivative of my displacement versus time data (imported from Excel) to get the velocity and the acceleration?

Yes. First, put your time history data into an ARRAY type variable, and then use the VPUT command to load this data into /POST26. You can then use the /POST26 command, DERIV to take the...

How do I change a Workbench Simulation solution to use different "Time Step Sizes" in each Load Step?

In order to change the "Time Step Size" for each loadstep in Simulation, you first need to define the number of load steps you want to use. If you look at the attached image,...

How can I get the total Heat Flow across a contact pair in Workbench Simulation?

Simulation does not have the intrinsic capability to retrieve the heat flow from a contact pair. The only way to do this, is by the use of a Command Object.<br><br>Enclosed are a...

How can I use FE Modeler to change a mesh? I do not have the geometry, but I do have a mesh.

In this case, since you have an ANSYS CDB file, this can be read directly into FE Modeler. The following images detail the steps required to accomplish your goal.<br><br>-...

How can I create a MS Word Document from my "Design Simulation Report Preview", and also include Author, Subject, and Prepared For?

After you have successfully completed the solution to your analysis, click on the Report Preview underneath the graphics window. Then go to the lower left Details Pane, and enter the...

I am importing a mesh file into CFX-Pre 11.0. In my file, there are named composite regions which contain surfaces which span several bodies.

I am noticing differences in the naming conventions that CFX-Pre applies upon import of such meshes between CFX 10.0 and CFX 11.0. In 10.0, the composite region would be broken up into smaller regions which retained the name of the original - for example Surface1 would be divided into Surface1_A and Surface1_B.

When I import the same mesh into CFX-Pre 11.0, I no longer see this, but instead notice that a number of regions named Primitive ... have been created.

This makes it difficult for me to assign boundary conditions in CFX-Pre version 11.0 as I have to work out what the new names are for my boundaries.

Is there any way to revert to the old 10.0 naming conventions when importing meshes into CFX-Pre?

<br><br>The problem you describe has been noted for ICEM and IDEAS format meshes.<br><br>It is not a bug, but rather a change in how CFX-Pre processes names for 2D regions...

I am trying to set up a PC to run the CFX solver in parallel. I would like to use MPICH2. The PC is a 64-bit PC with 2 quad-core processors and it has Windows Vista 64-bit installed.

The following error appears while trying to install the MPICH2 service using the command "cfx5parallel -install-mpich2-service":

OpenSCManager failed:
Access is denied. (error 5)
Unable to remove the previous installation, install failed.

<br>In the installation and licensing documentation, under "ANSYS CFX windows (x86 and X64) Parallel Setup", the instructions say to open a Command Prompt window using...

Workbench 11 SP1 has been installed on a new Windows XP 64-bit machine. I am unable to run this product but an administrator can - I get the following error message:

Registry Editor
Registry Editing has been disabled by your administration

When Workbench 11 is started for the first time by any user it runs through registering all the Workbench settings under the Registry folders:


If you do not have write permissions to the above folders you will get the message shown. You will need to wprk around this with your IT people.

Note: At release 11.0, most registry settings were written to HKEY_LOCAL_MACHINE

At release 11.0 SP1, registry entries were changed to HKEY_CURRENT_USER

Q:<br>Workbench 11 SP1 has been installed on a new Windows XP 64-bit machine. I am unable to run this product but an administrator can - I get the following error...

In TAS (Thermal Analysis System), selecting Solve > Steady State > Finite Difference, the solution runs for a short time, then produces the following error:
Microsoft Visual C++ Runtime Library:
Runtime Error!
Program: C:Program FilesANSYS Incv110TASTAS.exe
This application has requested the Runtime to terminate it in an unusual way. Please contact the application's support team for more information.

- The same model may solve correctly in a previous version of TAS.
- The model may have a very large geometry size difference between various parts of the model.

Try increasing the Undefined Resistances value.<br><br>In Settings > General: Change the Undefined Resistances to 1e+20, (default value is 1e+10). This parameter is essentially...

Class 3 Error

If you have a GGI interface when using the total energy model including viscous work, then the Solver gets an incorrect answer because the viscous work term is not included at the interface. The effect of this will often be small, unless viscous work is the dominant physical process.

This is due to the viscous work not being included in the control surface equations at a G

WORKAROUND:<br>Use the thermal energy model with viscous dissipation if possible.<br><br>FIXED IN:<br>ANSYS CFX Release 12.0.

I am getting the following error when I run ANSYS LS-DYNA 11.0 on a PC:
The /PMETH command is either not available for this version of ANSYS or the appropriate product was not selected for this session. Contact your ANSYS support person for more information.

This is a known problem in ANSYS LS-DYNA 11.0 and 11.0 SP1. However, it is more of an annoyance than anything else, as the P-method is not applicable to ANSYS LS-DYNA and the error does not...

The Report Generator images come in at a fairly low resolution. Is it possible to force this to a larger size?

Yes you can, but the solution requires a bit of explanation first.<br><br>There are restrictions on the size of the images in the current release (v110), and no changes are being made...

How do I manually register Windows Scripting DLL libraries?

As ADMINISTRATOR, at a Windows Command Prompt, change to the directory c:windowssystem32, then type:<br><br>regsvr32.exe ole32.dll<br>regsvr32.exe atl.dll<br>regsvr32.exe...

How does the AVPRIN command affect principal and equivalent stress (SEQV) calculations in a random vibration (PSD) analysis?

In ANSYS, Release 11.0, if the AVPRIN command is not issued, the Segalman-Reese method is used to calculate SEQV in a PSD analysis. The Segalman-Reese method does not calculate principal stresses....