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    • Rahul Ponginan

      Please click here for a short but important announcement   03/26/17

      Dear Users Our Commercial and Academic users around the world can use these same forums here as before i.e. the Altair Support Forum , Commercial users from India with solver queries can go to the Solver Forum for India Commercial Users , Academic Users from India and AOC India Participants are requested to go to the Forum for India Academic Users and AOC India Participants , We will be tending to all queries in all the forums promptly as before, thank you for your understanding. 

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  1. Past hour
  2. One side is perfect, while opposite not. When I increase tolerance between two shell mesh(increase height of hexa) it works. Please help me to solve
  3. Hi Tinh, Please see the image. I have marked two nodes in the image. If i select those nodes, opposite element is selected. That is, I am getting wrong selection. My hexa height is 1.9.
  4. error % radioss

    Hi @Prakash Pagadala I have also encountered the same problem and i have checked my initial penetrations where i have kept IACTI=6 already.
  5. Today
  6. At my practice If today I give the bolts pretension and I want to use this result to give gravity. So we can get the results and without pretension analyzing time, just let the analysis used the pretension result to run the gravity. Also we can use the pretension result run any other situation. How can I do this? I also meet the problem of *** ERROR # 1997 *** in the input data: In SUBCASE 1: STATSUB(PRETEN) must refer to a SUBCASE above the current one. These are my two step first is gravity and second is my pretension
  7. Yesterday
  8. Solid-fluid interaction

    This is probably more than you can get from a forum. It's probably better to see if the local Altair support team is able to assist.
  9. Definition of cp and cp-total

    It seems there may be a mistake in that formula. You wouldn't sum velocity_magnitude and vwtVel - the 'velocity' term squared should be the overall freestream velocity, which is likely vwtVwl. The pressure difference would be the local static pressure P minus some reference pressure. You could use the integrated static pressure at the inlet for the reference pressure. I suppose you could also use the integrated pressure at the outlet, which may be 0 if that is the boundary condition used. So long as you always use the same definition, then your comparisons would be valid.
  10. Composite ply

    Hello, I also receive this error often. Any advice? Best, joep
  11. Hello, I am having problems when I try to run any analysis on a front suspension model. I used the FSAE Templates to build the front suspension and also used a standard analysis template. And I keep getting this message when a try to run any kind of analysis. "INFO" "17:08:05" "*** Begin sending off data" "INFO" "17:08:05" " Sending off 1 API version string [HWVERSION_2017.2.0.16_Jul 25 2017_18:12:43]" "INFO" "17:08:05" " Reading API version string [2017.2]..." "INFO" "17:08:05" " Writing model to [C:\Users\formulaCefast\Altair\ES_10\Dianteira\E1SPSuspDianteira.xml]..." "INFO" "17:08:05" "*** End sending off data" Thank you, Pedro Dias.
  12. Composite ply

    Hello, Does anyone know why my ply direction is directed in both ways, while only apllied 1 ply? with direction 45. Is this normal? I also would like to know how to drape a laminate over a curved surface. Is this the option shown underneath? Here I also see the arrows in all directions: Best regards,
  13. Non design space cone

    Hello, Thanks for the reply. Is it also possible to model both solids in my CAD software so I do not have to make or split solids in Hypermesh? Best regards,
  14. Hello, I am looking to constrain a hole of a 3D model. I am currently using RBE2s (with all 6 DOFs on) within the hole and applying a constraint to the independent node in all 6 DOFs. Doing this I am able to successfully run the optimisation. However, I want to simulate a bar constraint where the model can rotate about the y axis but no others. I have tried deselecting the 5th DOF on both the RBE2s and constraint but this results in the optimisation failing. How do I go about applying constraints to all DOFs but 5 (moment around the y-axis)? Additionally, I am using RBE2s currently as I can apply a constraint to these. However, ideally I would be using RBE3s as these will better represent my problem. Is this possible to set up with the constraint in limited DOFs in mind? Thank you
  15. Modeling a PCB meander line antenna

    Hello manuel_lulea There is no requirement for a ground in FEKO. I assume you are going to excite the antenna with a voltage source (edge port?) and the only thing that you need to do is specify the positive and negative sides of the port / source. I can't provide more info without more details from you. Why did you think that a ground plane is required? Did you run into a problem when trying to perform the simulation?
  16. oSSMOOTH Optimized model Reanalysis

    Hi, Can you add PARAM,>>CHECKEL>>NO and check if this helps
  17. rigid body mechanism

    Hi, Is it possible to simulate a rigid body mechanism similar to rigid MBD? Bodies and joints have to be perfectly rigid to avoid jamming/binding closed kinematic chain mechanisms. Attached is the sample containing RBODY elements connected through revolute Kjoint2, which is defined with stiffness so there is some unwanted compliance. Any ideas or workarounds to carry out kinematic studies in Radioss? rigid_body_mechanism.hm
  18. Create topo databases by hand?

    For the manual definition of a topo database ProMan can be used based on the following steps: • In ProMan select Data => Topography => New Database • Then define the UTM zone, e.g. 32 • Define LL and UR corners plus resolution • Load a bitmap in background or skip the bitmap import • Define min and max topo values • Draw the terrain profile (e.g. rectangle with constant height over the defined area) with the mouse using the corresponding buttons from the upper tool bar: • Finally save the via Data => Topo Database => Save As Alternatively you can export one of the sample *.tdb files (examples came with the installation) in ProMan via File => Export to the ASCII grid format and then you can modify this ASCII file to generate an arbitrary terrain profile and import then back in ProMan. We'd like to mention that typically the topographical databases are not generated from scratch, but converted from other formats using the ProMan or WallMan tools. This is because it is very difficult or rather impossible to define a detailed terrain profile manually. For the conversion WinProp supports several converters: • USGS • HGT • MSI Planet (Marconi) • Siemens Tornado & Tornado N • Aircom Enterprise • Nokia NetAct & NPS/X • Ericsson TEMS • Agilent Wizard • ArcView Shapefile • ASCII Grid (*.asc) There is also some free topo map data available. E.g. topo data (SRTM) in 1arcsec and 3arcsec resolution under: http://dds.cr.usgs.gov/srtm/
  19. Create topo databases by hand?

    How can I create my own topo databases?
  20. Hypermesh - select elements by geometry

    thank you @tinh Selection "by solid" is working after association of the nodes is done. Thank you, Bharath
  21. Path Loss definition in WinProp

    In WinProp, the Path Loss indeed includes the Antenna Gain. This may not be intuitive, but it's the way it was implemented. You can easily obtain the path loss you (questioner) expects by working with an isotropic antenna (Gain = 0 dB in all directions).
  22. Path Loss definition in WinProp

    When I display a Path Loss result in WinProp, it looks as if the antenna pattern is still visible in there. Shouldn't path loss be independent of the antenna gain in any given direction? It should only depend on geometry and materials and frequency, right?
  23. Models adopted by 3GPP?

    Yes, WinProp offers besides the deterministic ray-optical and our unique dominant path wave propagation model also empirical models like Hata-Okumura (for rural scenarios), COST231 Walfisch-Ikegami (for urban scenarios), and Multi-Wall model (for indoor scenarios) which are also adopted by 3GPP for the pathloss prediction. Accordingly the WinProp wave propagation models (especially the deterministic ones, but also the empirical ones) can be used for the 5G and LTE radio channel analysis as well as the radio network deployment.
  24. Models adopted by 3GPP?

    Does WinProp support models that have been adopted by 3GPP?
  25. HM file for Crash Analysis Pre - Processor setup using Hypermesh

    Hi George, Can you provide Quality criteria file, which is used for crash analysis of automobiles.. I have gone through basic batchmesh crash criteria file ..Apart from it, is it possible to provide Quality criteria file for the below model suggested by you..
  26. I said, you have to put the shell comps into an assembly named ShellComps, did you do it? and do not put hexa comp to that assembly
  27. Hello Im trying to re-analyse my optimized model, but after extracting the FE model from oSSmooth and trying to analyse the model whit the same loading conditions, i get an error which is as follows: Element # 117963, element type TRIA3. *** PROGRAM STOPPED: ERRORS DURING ELEMENT QUALITY CHECK. I have tried changing the property of the design area to PSOLID as the FE model which was created is a 3d type mesh, but still getting errors. I've attached the .fem and .sh files here would really appriciate any help you can provide cheers FinalbeforeoptM.fem FinalbeforeoptM.sh
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