Jump to content


Popular Content

Showing most liked content since 12/23/19 in all areas

  1. 1 like
    If element thickness was assigned via component, not directly by element, this command returns nothing. In this case you have to call "hm_getthickness component"
  2. 1 like
    Hi, You have to pack after creating. ::hwtk::button $f.b1 -text "Text Button" -help "Text only" -command {*createentity comps name=component3} pack $f.b1
  3. 1 like
    Hi Seckin, Set the -textvariable as a namespace variable, you can do the below hwtk::labelframe $w.lf3 -text "Defined List Only" hwtk::combobox $w.lf3.cb -values $beam_list -help "BEAM SECTIONS" -textvariable ::beam_sect puts "$::beam_sect"
  4. 1 like
    Those undercarriage beams are not connected to the RBE3's in a sensible way. The RBE3 doesn't have any stiffness of it's own, so those undercarriage beams are essentially just floating around. I suspect you ought to extend those beams out another element-ish and connect into the center (dependent) node on the RBE3. That's one problem. Next, you can't constrain the center node of an RBE3 because it's already dependent on the nodes it connects too. If you still really want to constrain it, you could put something like a stiff CBUSH between the undercarriage beams and the RBE3 to break up the dependency. Then you can constrain the CBUSH grid, just adjacent to the center RBE3 grid.
  5. 1 like
    If the node is common among different parts and you get an average value by part.If you select the option in contour panel average across component boundaries you will get one single value then you will just need to check the remove duplicates in the query panel.
  6. 1 like
    I see some modelling issues in above shared model..I believe this you corrected and shared in below post. https://forum.altair.com/topic/37782-h3d-error/
  7. 1 like
    Hi, exporting solver deck from Hypercrash will include names of parameters.
  8. 1 like
    Try to put your commands in a proc & call this proc via -command ? Remember : the valid command is "*create....." not "create...."
  9. 1 like
    Based on the limited information provided, we really can't offer much in terms of help. The possible problems are to many to discuss here. Rather than start with a full vehicle model, you should be just the front and rear suspension separately. Using this method, you can use the half-car events to fully debug your model before going to complex full vehicle simulation. When we assemble the full vehicle model, we first run simple events, like straight line acceleration and straight line braking. If the model looks good with these events, then we run events like constant radius, and swept steer. Only when the model is fully debugged, do we look at running events like lane change.
  10. 1 like
    No thickness information within element dataname. You have to look for the property of element.
  11. 1 like
    There are multiple ways to do it. This one i feel is one of the straight forward ways. Please do the following steps. 1. Select all the faces . 2. Go to Body > Create > From Faces > Duplicate and make non shared faces 3. Select Ok This will create tri elements of the outer surfaces. Thanks Siddharth
  12. 1 like
  13. 1 like
    Looks like the CWELD element is not attached directly to adjacent elements but through the tie contact. In Radioss user profile there is the option to include tied contact. Unfortunately, such functionality is not supported in Optistruct user profile.
  14. 1 like
    Hi, try this procedure: -isolate CWELD elements of interest with the mask panel (F5) -in the Find panel (shift+ F5) find elements attached to the CWELD elements. The attached elements will be unmasked. -check if the unmasked elements contain 3d elements (use the mask browser to show/hide entities by element types).
  15. 1 like
    If you use HM 2019, you can use "VIEW by Element quality" Then right click on color panel >> Edit Criteria >> Check off unwanted criteria Or left mouse click on SIZE to isolate view Size failed elements. Click on it one more, it will show all criteria
  16. 1 like
    In TuMan, please try File / Export Binary instead of File / Export ASCII. I could reproduce the problem you had with .ida. The geometry may still be valid, but those messages are disconcerting. When I export in binary format from TuMan, things are fine.
  17. 1 like
    Time varying convection Convection coefficients can be specified as time-dependent when a control node (CNTRLND) is specified on CONV card. The control node must be constrained by an SPCD, which is made time dependent by TLOAD1/TLOAD2. The convection coefficient is multiplied by the value from SPCD of control node.
  18. 1 like
    M.karthickraja - If you look at corner stress data instead of centroidal stress data, you will likely find the results are much closer. - Robert
  19. 1 like
  20. 1 like
    Hi, Hyperview can be used to post-processing animations files. Hyperview can be used to plot time history files. Energy balance curves are output by default, only need to define TFILE output frequency. Check the following video (relevant from 1:38:30): 2016 Directed Learning Webinar Series - Crash Analysis with RADIOSS - Altair University TP005_editT01 TP005_edit_0001.rad TP005_edit_0000.rad
  21. 1 like
    Hi, In dynamic analysis when the geometry is borderline between the classification of 2-D and 3-D geometry, 2-D shell elements are preferred over 3-D. This is because shell elements being less stiffer captures the mode shapes accurately and with a fewer number of nodes and elements. Also, in FEA the result depends on element type and mesh refinement of the model. Thus you are getting variation in stress values.
  22. 1 like
    Thank you so much @Hyperman I got it. HAPPY NEW YEAR TO YOU!!!
  23. 1 like
    Hi, to check element quality use: check elements (F10) to check each quality criteria one at a time 2D>qualityindex can concurrently display multiple quality criteria (chosen in QI settings) Quality Index - Altair University
  24. 1 like
    One easy way to the frontal area calculation is import the surface mesh (.Nas or Bdf format) in Virtual Wind Tunnel. It calculates the frontal area automatically.
  25. 1 like
    Hello, Thanks for your reply. Yes, I have read your post, and follow excatlly the same way as shown in the topics. I will add try catch loop into my master script. If any progress, or interesting finding, I will add here. Have a nice day.
  26. 1 like
  27. 1 like
    Hi, please refer to HM-3410: Create Area Connectors. HM-3410_ Create Area Connectors.pdf frame_assembly_1.hm
  28. 1 like
    I would have to check with the developers on this specific error message, limitations, etc. This will probably only be in the 2nd week of January.
  29. 1 like
    This happens when the waveguide is over-moded. For example if a horn antenna is designed for 3 GHz and you solve it for 10 GHz there will be many propagating modes, where, usually, you would want only 1 mode to propagate.
  30. 1 like
  31. 1 like
    Translate => nodes => select the existing node => duplicate => Got temp node at the same location as existing node.
  32. 1 like
    Hi mate ! You can use for example TIE constrain to link the master surface with the slave one. Normally, in contact problem we refine the mesh of the slave surface. But I think in your case, linear static analysis, there will be not so much difference. You can use the automatic mesher and mesh the parts using Tetra approximation. It's okay if you use Tetra finite element ... But in Nonlinear static analysis, we recommend to refine contact interfaces (slave surface) with S2S discretization to ensure the convergence of the contact pressure. You welcome mate
  33. 1 like
    Dear Altair Teams, please find attached the starting document and data for the science hack this weekend. We would like to wish you a good start. Post your questions within this Forum. You might also upload data or models within this Forum. Thomas, Lorenzo, Jan and the Altair Team Altair_Climate_Model_StartHere.pdf ChallengeData.xlsx
  34. 1 like
    If you are using Student edition, then you may not be able to use the point release. Please check the details below for the research license. https://altairuniversity.com/researcher/success-is-the-ability/
  35. 1 like
    If you are a commercial customer then please upgrade to HW Desktop 2019.1 (hotfix is 2019.1.1)and for solvers OptiStruct 2019.1 (hotfix is 2019.1.1)
  36. 1 like
    As mentioned above this is available with OptiStruct 2019.1 version. In OptiStruct the MATVE bulk data entry defines the material properties for Viscoelastic materials. MATVE is only supported for Small displacement nonlinear static and transient analysis.& Solid elements both first and second order (CHEXA,CTETRA,CPENTA,CPYRA) are currently supported.Let me know if you need the demo file for same.
  37. 1 like
    Currently shell and membrane for MATHE is not supported.PFA highlights of OptiStruct 2019.1.
  38. 1 like
    Defines the properties of nonlinear hyperelastic solidelements, referenced by CHEXA, CPENTA, and CTETRA Bulk Data Entries. The MATHE hyperelasticmaterial can be referenced to define corresponding material properties.
  39. 1 like
    Either the PSOLID or PLSOLID Bulk Data Entry can be used to reference the MATHE Bulk Data Entry.
  40. 1 like
    Hello I modify some things Please copy these modified files and overwrite the old ones If something's wrong, simply backup original files and let me know issuesReports_modified.zip
  41. 1 like
    Hi everyone. Now I want to active (stick) field "User corner data" as figure. But my HyperView can't active this one. I don't know why. I'm using HyperView 2019.1 Thank all Best Regards
  42. 1 like
    MotionSolveの計算中はmrfファイルのみ出力し、計算が終わったのち、mspostというプロセスが実行され、アニメーション用のh3dファイルや、プロット用のabfファイルを作成します。 計算途中で、アニメーションを見たい場合は、手動でmspostを実行すれば、h3dファイルを作成して、アニメーションを確認できます。また、h3dなどの出力を忘れた場合やファイルを消してしまった場合に、mspostのみ実行すれば、計算しなおす必要はありません。 ということで、mspostの使い方を紹介します。mspostの実行にはいくつかパスを通す必要がありますので、パスを通したバッチファイルを用意しました。 添付ファイルの1行目の set INSTALL_ROOT=G:\Program Files\Altair\2019 をみなさまのHWインストールディレクトリに書き換えて保存したのち、このバッチファイルを実行してください。 開いたDOSコマンドプロンプト上にて mspost aaa.xml aaa.mrf bbb.h3d でaaa.xmlとaaa.mrfからbbb.h3d、bbb.abfを作成します。 また、linear計算のh3dを作成したい場合は、 mspost aaa.xml aaa_linz.mrf bbb.h3d としてください。 ※ファイルのダウンロードには、必ず当フォーラムへのログインが必要となります。ログインしない状態でファイルをダウンロードすると、ファイルが存在しないといった旨のメッセージが表示されますが、実際にはログインするとダウンロードが可能になります。 motionsolve.zip
  43. 1 like
    Thank you for sharing the PDF @ydigit, I have outlined the steps I took to resolve this in forum post attached below: Thanks
  44. 1 like
    Hello, To anyone that may come accross this post with the same issue. To resolve this, I have been using the following method: 1. Create 2D HyperMesh (HM) shell 2. Export solver deck - CFD - Nastran (Fluent standard format) 3. Import into Virtual Wind Tunnel (VWT) 4. Set up CFD simulation, but do not move model, only move the wind tunnel, otherwise the nodal coordinates between VWT and HM will not correlate. If you need to rotate/angle your model in a particular way to the flow (which travels in the positive x direction on the XY plane), then you should do this in HM before exporting your solver deck file 5. Run CFD 6. Open HyperMesh and import .log file 7. Turn off all components other than the surfaces you wish to obtain to nodal pressures for 8. Open the 'Contour' panel, change the 'Result Type' to 'Pressure'. Click Apply 9. Click on the 'Results' drop down from the menu bar' - select 'Query' 10. Ensure 'nodal coordinates' and 'Contour (pressure)' are selected on the panel on the left hand side. Shift+drag to select all the desired nodes in the graphics area 11. Select export. Save the .csv file 12. Open this in excell, delete the first two rows. Export as a .txt file 13. Open the .txt file and ensure there are no commas seperating the values, if there are, then use the replace function and replace all commas with nothing (so they are deleted) 14. Open HyperMesh, go to the the Pressure panel. Select entities - elements - drag and select all surface elements. Select linear interpolation - file -> .txt file - search radius ~ 0.005 (if your units is in m). Nodes on face - drag and select all surface nodes. Select create. Hope this helps Thanks
  45. 1 like
    Alex, It has been a while since you asked that question. I don't know if you still need help. If you do, please check Analysis -> Preserve nodes see if there are any preserve nodes in your model. HM would automatically delete those once you transfer any preserve nodes to normal nodes.
  46. 1 like
    Use MATHE card.PFA screenshot for same.
  47. 1 like
    If you have access to 14.0.Explore ACCEL card in Optistruct. See attached screenshot.HM-OS yet to support this card .Try checking using unsupported cards.
  48. 1 like
    start this .exe /13.0/hm/bin/win64/hmbatch.exe with this parameter -tcl "link to tcl file" (for your script) In hyperview it is <altair_home>/hw/bin/<platform>/hw.exe -clientconfig hwpost.dat -b -tcl example.tcl -b for batch -tcl for your script best reagrds Merula
  49. 1 like
    Yes, i wasnt sure which type of elements you are using. For Solid Elements the Input for MORIENT is not necessary, the initial penetration is always pushed out. So to get your deck working it should be sufficient to define a CONTACT Card and leave MORIENT blank.
  50. 1 like
    Hi, in loadstep you did not select "SPC" so the warning appears. Check it again please
  • Create New...