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Found 619 results

  1. Hello, If I am to put RBE3 in a hole (with no force or constraint attached to the dependant node) will this imply any stiffness to the voids outer surface where the independent nodes are? Or does the hole just remain as it would if it was a void with nothing in it? What type of 1D element could be used to provide a defined stiffness to the outer surface of a hole? Thank you in advance
  2. hello everybody, i have to do an aerodynamic simulation of a race car and i ve done the 2d surface mesh of the shell and of the box (there aren t free edges or t junction). now i ve to do the tetramesh to simulate the fluid domain but it fails all the time and i don t know why.. someone can help me?
  3. Hello, I am using VWT to access to the surface pressures on a model. These are then to be exported and applied to the model within HyperMesh via linear interpolation. I recently came to realise that if I move the model in VWT then the nodal pressure coordinates that I can then export to a .txt file are wrong. They do not align with the nodal coordinates of the model within HyperMesh, but refer to the region of space that they occupy in VWT. Thus, you must translate and rotate the model in HyperMesh first. This is justifiable and works for just one loading scenario. The problem I am having is that I wish to do a weighted compliance topology optimisation with multiple loading scenarios that require the angle of incidence of the flow to change. Therefore, if I rotate the model, the pressure files nodal coordinates will change and I will not be able to use the same hypermesh file (as it will have to be rotated accordingly too). So, is there a way to change the direction of the flow or rotate the windtunnel within VWT - so that my model can stay constrained in its geometrical space but the loading scenario can change? Thank you in advance.
  4. Hi, I'd like to model a box floating in open water, that means that wave generation and especially wave absorption should be modelised. I've modeled this on Hypermesh with the solver Radioss In this model, there are 2 sorts of interaction : - fluid/fluid : air with water - fluid/structure : both fluids with the box. First, I've used an ALE model for the fluids. I've tried to use both MAT/LAW51 (multimaterial) and MAT/LAW37 (biphasic material) in order to model this, but everytime there is a leakage and the computation can't run until the end (negative rho error). I've also tried to use MAT/LAW11 (bound) because it doesn't work properly with a biphasic material (negative rho error). Then, I've tried with an SPH model with IN and OUT condition, so that the computaiton doesn't take into account the air/water interaction, the computation also stops because of a leakage. For the fluid/structure interaction, I've used INTER/TYPE18 and INTER/TYPE7 respectively for ALE and SPH model. I have to set a STfval value for the stiffness. I use the formula of the Help page : stfval=rho*v²*A_el/GAP = 66.667avec - rho=rho_water = 0.001g/mm3; - v=10 mm/ms , initial velocity of the box when it is dropped in the water; - A_el = lagragien element surface =500 * 500 mm² ; - GAP= 1.5 * E_el = 1.5 * 250 = 375mm With this value, the box is floating in the air, the only way i've found a value that models reality was by dichotomy.. That's not convenient for further simulation with different initial data.... Should you have any suggestion to model an infinite water volume (so wave absorption) and for the stiffness value, please contact me. Sincerly yours, Emmanuelle
  5. Hi All, Is there any command to popUp the Color Window at component model? To change the color of component please see attachment.. Regards, PD
  6. Hello , Are there any options in HM to visualize zero length CBUSH elements . Thanks Girish
  7. Hi All, I have a cylindrical model in which there are nodes present at the center of each axial location. Is there a way to filter center nodes from whole set of nodes available in the model? Imagine, I have no inputs or reference to find the center node available in the hm session? When my tool is opened, I wanted to collect all the center nodes available in the model. Please suggest me a way to achieve this... Regards Gopal
  8. Hi all, I have a node , say 659801 and I have coordinates as (138, 150 ,0) and coordinate system id =345 Now, I want the above coordinates with respect to some other coordinate system say, 400. I am not able to locate HM-APIs which does this transformation? Please suggest me a way or API to do this transformation of coordinates.. Regards Gopal
  9. Hi together, i am trying to couple different simulations. Therefore i am searching for a method to map results eg. stress (referenced to cartesian coordinates) to equivalent nodes in hypermesh (model/mesh is representing the same geometry) for setting up a new optimization with optistruct. Thanks a lot Björn
  10. Knee Extension Testing .zipHi there, I have a problem to open these input files in Hypermesh. The user who generated the input files said, it was developed using Hypermesh. However, when I import to the Hypermesh, I ve got errors and warning. These files was generated for Abaqus CAE. So, because of some problems during converting, it cannot open in Abaqus CAE. Anyone can help me? Please. I ve attached the files here. Also you can download it from the link here. http://digitalcommons.du.edu/natural_knee_data/1/ DUO1 - >Finite Element Model for Knee Extension Testing (4.3 MB) Knee Extension Testing .zip
  11. Hello all, in the analysis of cold plate . I have fins inside the fluid domain and outside the cold plate. If inside and outside fins are treated as thermal shells in acusolve then in hypermesh the elements of fins will be in which collector: fluid collector or coldplate solid collector? As in pic you can see the placement of inside fins and outside fins. Please help.
  12. Hello everyone , while i made mid surface in manually (its means small edges toggle ) its automatically transparency decreases , its transparency decrease plastic component , i will do every time after made mid surface we manually increase transparency .how to switch off automatically decrease transparency or give me any valuable comments . Thanks mid_s.hm
  13. Hello everyone , i made mid surface in manually and i have some in edges are not connected exactly if i try replace edge tool they surface are change the shape in irregularly, please check below attachment. mid.hm
  14. I updated to Hyperworks Desktop 14.0.130 and the Contact Tool is not available in the "Tools" dropdown. It used to be grouped with the Pretension Manager and now it is missing. Where did it go?
  15. Hi I am working on crash analysis (having 37 components) and in my model for a minimum element size of 0.25 inches, I have about 28000 elements failing. is there any way to clean up these elements other than the conventional way of editing each one separately. Thanks, Datta
  16. Hello, I'm trying to run a 3 point bend test. The supports doesn't matter, if possible i would like to make it rigid, but to avoid stress concentration in a point i need to model this contact between the support and the I beam. How can i do this, or find some tutorial more focused ? Thanks !
  17. How do I restore the tkconsole manually through the menus if it disappears from its original position in HyperMesh ?
  18. How to apply both Gravity and pressure in Hypermesh Abaqus interface?
  19. Hello, I was trying to create a node using, *createnode 0 0 0 0 0 0; and then assigning it to an entityset using, *createmark nodes 1 [hm_latestentityid nodes]; *entitysetcreate "SetName" nodes 1; However when I go check the created set in the HyperMesh Model GUI under Sets, it doesn't show any nodes added to it. I'd appreciate any help with this issue. Thanks.
  20. Hi, How could I go about using the *elementtype and *elementsettypes commands in Hypermesh, is there a listing of config and element types that I could use for the same ? For example to know what config and element type ids match the F3D3 element type ? Thank you.
  21. Hi all, I want to do a drop simulation, but the direction of the rigid wall is not parallel to the global axis direction. So I think a new system with one plane parallel to the rigid wall should be defined. I think first I should define a system parallel to global system, then rotate the new system to the target direction. The system panel was used to define the system, however I found the system was a moving system, so how to define a fix system in HyperMesh? Best Wishes Roy
  22. I have the attached component. It is really giving me trouble for meshing. I have tried automatic geometry clean up and also defeature to remove small fillets. It seems that these options are not very powerful for geometry clean up. I want to create 3D tetramesh. I appreciate if you can help me with that. I have spent a lot of time on this component but no success. The stp file is attached. I don't need a fine mesh. A coarse mesh would be enough. DC-KT4B-R01628-B-MUCELL-PRPSL-FEA_01sep16.stp
  23. Dear Community, I would like to present you a possible bug I found in Hypermesh 2017 when it creates the input file for optistruct including a buckling analysis (due to limited time, I have not checked if the same problem appears with other analyses). Please find attached an example and refer to the example for the description below. When you try to create the Optistruct file to run (for analysis only, -optskip), Hypermesh creates the following subcase card for buckling: SUBCASE12345678 LABEL Linear Buckling ANALYSIS BUCK SPC = 1 METHOD(STRUCTURE) = 3 STATSUB(BUCKLING) = 1 The first row is missing a space and the solver gives you the following error if the space is not added manually: *** ERROR # 1461 *** in the input data: Card "LOAD" is not allowed for this subcase type. The problem seems to be present only if the loadstep ID is made by 8 digits. I hope this will be helpful to somebody. Regards, Alessandro buckling_issue.hm
  24. Dear All, I want to make electrical simulation combine with thermal (heat transfer) aspect on complex assembly. I've made the FE model with hypermesh optistruct profile and export as .fem file, but I can not import it to FLUX. Is there any way to do it? Please, need your advise. Thank you, Best regards, Iron_Man
  25. Hi, I have a question which one is called as a Perfect mesh or Fine mesh? When or under which conditions, my meshing is said to be a perfect mesh? Thank you
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