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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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  2. Obtaining so few samples could also happen if your model construction is wrong, for example, if you have some antenna but your port is somehow not connected to the antenna, or your antenna is supposed to radiate at say 1 GHz but you are solving for 100 MHz. Then the S11 would be zero and there would nothing to interpolate really over the band, i.e just a flat line response.
  3. Thanks @ALM, I'm attaching three models that you can take a look at. editfeko_forloop.pre This is essentially what you provided above and (as far as I can tell), it works as expected. The PREFEKO language (what you use in EDITFEKO) can be quite tricky. New solution configurations are triggered by certain cards (e.g. a new source and a solution request). If your loop didn't contain certain triggers, then it's possible you wouldn't have seen all ten configurations. The model that I attached shows that your loop is configured correctly, provided the rest of your configuration is fully configured. The downside to this method is that it is more complex to configure and results in ten independent configurations. editfeko_freqrange.pre This model shows a simpler method to request a frequency range in EDITFEKO. The FR card has an option for you to specify a start frequency, end frequency and the number of points: FR: #freq_Samples : 0 : : : : #start_frequency : : #end_frequency FEKO will then take care of the loops and store the results in one configuration. cadfeko_freqrange.cfx Finally, I'm adding a CADFEKO model (created with CADFEKO 14.0.432-293039 (x64) from 2016-12-06) that requests a frequency range from 2.2GHz to 2.5GHz using 10 samples. This is by far the simplest (and safest) way to configure a model and would be the recommended method. My best guess is that you were using the "Continuous (interpolated) range" option to specify the frequency. For this setting, FEKO will decide for itself how many points are needed in order to accurately represent the simulation data. In your case, it's possible that the algorithm was satisfied to stop after four points. If the results are inaccurate, you can increase the "convergence accuracy" to "High". Otherwise, your problem could be that the mesh is too coarse or there is some other problem with the model setup. If this still doesn't help, please attach an example model so that we can see what you're working with.
  4. Today
  5. [GNA] Post-Buckling of arch plate in Optistruct

    Hi @ahenkes1 Sorry that I couldn't able to reply due to long weekend At my end Transient NL run fails with convergence issues at exactly 95% load. I would be interested in looking at your model
  6. linear static with contacts

    Hi Rahul, Thank you for the update
  7. Tsai-Wu failure criteria, strength ratio

    Hi, Sorry for a late reply. I could not able to find a way in OptiStruct which provides the maximum load required. But you can multiply the applied load with strength ratio which provides maximum load to failure (which should make SR= 1 and FI =1)
  8. Blow Molding

    Hi Harsh, Please share me the same file with the out file generated.
  9. Blow Molding

    No.... I simply run the file u sent....
  10. Airbag Deploying simulation / Communication Surface

    Hi MisterKarimi, Please go through https://altairuniversity.com/learning-library/airbag-simulation-setup-in-radioss/ , which is a webinar on setting up an airbag simulation in RADIOSS.
  11. How to write an effective essay

    Students mostly find difficulty in writing essay.One of the most difficult part of writing an essay is thesis statement. It is very difficult to come up with a good thesis statement.Writing a good thesis statement is important part because it will shape your body paragraph and determine what you are going to write.Online writing services like best essay writing service offers a lot of tips for writing essay and also writers take care to provide the highest standards in custom writing service, and one can meet all the requirements & submit the paper on time.
  12. How to output the correct nodal acceleration in Radioss

    Hi Roy, I suspect with the material values and unit consistency followed. Please review the same in the model. For nodal accelerations you can define an accelerometer in the model using sensors and create an output block for the same. From the time history file you can plot the curve.
  13. Please refer below post on same error.
  14. CAN ANYONE KINDLY HELP ME WITH THE FOLLOWING ERROR? *** ERROR # 1243 *** Duplicate ID 2000550 in SPOINT data.
  15. Yesterday
  16. Hello everyone, I am about to simulate an Airbag deploying and I have got following problem: I would like to get this airbag as a system with several chambers by using the Cardimage "Airbagwithcommunication1" the way i can simulate it with Communication surface. The following example shows how it should be built. RBPLI_UP_0000.rad While simulating comes out this error message In general that system has got 4 chambers, for every single chamber appears the same error message. All chambers volume are closed and the mesh elements are normal outward-orientated. By using the Cardimage "Airbag", the simulation runs without any problems. My question is: How can I create the Surface Communication? Knowing that this Surface Communication has been created manual as Shell Elements 3-4 nodes with HyperMesh. Could it be the right element or not? It will be very kind from your side if you tell me what do you mean about the Errors ID 473 and 902. I have attached the Model and OUTPUT-file. Model_1_0000.outModel_1_0001.radModel_1_0000.rad Thank you so much in advance and wish you a wonderful day. Kind regards MisterKarimi
  17. License_Error

    Hi I am altair internship student, I have got the license for 1 month. This is 3rd month, when I obtain the license, I tried to install it as I have done before. But when I opend the software the error massage is shown as picture below How can I fix this error ? Thank you for your help Best regards Nut
  18. Last week
  19. linear static with contacts

    Thanks for your reply. I have now carried out non linear analysis and now the results make sense.
  20. thank you for your reply! the model is create within CadFeko then I swithed to Edit feko in order to perform the for loop as the continuous range option gives me only 4 files as output so I have checked the settings several times but the still getting the same thing. here is the for loop I am using. #start_frequency = 2.2e9 #end_frequency = 2.5e9 #freq_Samples = 10 !! for #i =1 to #freq_Samples step 1 #this_frequency = #start_frequency + (#i-1)*(#end_frequency - #start_frequency) /(#freq_Samples -1) FR: : : : : : #this_frequency ** the other cards were omitted just for clarity !! next EN
  21. Hi @ALM, Could you attach a model? Did you set up the configuration in CADFEKO or in EDITFEKO (I'm asking because you mentioned a for loop)? You can maybe check whether the maximum number of samples or the minimum step size is set. These both serve to limit the number of samples and could result in something like this. Another problem could be that the convergence algorithm isn't checking whether all of the results are converged. The defaults are usually fine but if you are looking at surface currents, then it might be switched off. Alternatively, you can try using linearly spaced points for now. I hope this helps!
  22. Hello ! I am facing a problem while using continuous range option from the frequency setting, I don't get more then 4 samples even if I require 10 for example. I have tried to use a for loop but it didn't work either , how I can get the required data in function of frequency samples ?! (Note: I have check in the forum and the only thing I have found was the for loop suggestion for a similar problem but it didn't work for me). Thank you! Best regards!
  23. Hello, I'm looking for tcl code to create rigid elements connection between two sets of nodes with selectable DOF, searching tolerance and local coordinate system. I tried to find something in script exchange, but unfortunately I didn't find anything. Have you any idea where can I find something to solve this problem? Maybe is there any build-in function in HM? I know spotweld tool, but I want to write all-in-one tool. Thank you in advance
  24. Hi, I am using Hyperworks (V13) to analysis 1D beam and rod. I used 3 pairs of Rev joint for point 3 as I don't know if there is any better way to join 3 part together. I created 4 bodys as PRBody. I created SIM, force SPC load collectors. But it always give me errors. such as *** WARNING # 1200 Incorrect or inconsistent data found in $HMxx cards. (Obsolete data format or errors because of manual editing.). All HyperMesh specific data will be skipped from input files. Component information in the output file will be missing.To rebuild this information - read back and recreate input file using HyperMesh. This happened in line 197 of file "C:/My_Folder/V2.fem": $ 40 39 38 37 36 35 34 33 32 Force can't be referred. I am really struggling here, Is there any body can help ? Many thanks. Sophie V2.hm
  25. Hi Try below set script "" foreach id $components { append script *displaynone \n "*displaycollector comps on \[hm_getcollectorname comps $id\] 1 1" \n "hm_callpanel ruled" \n } hm_setpanelproc $script
  26. multiply a number by input data in Hypergragh

    Hi Sara, We have a Scales, Offsets, and Axis Assignments Panel in HyperGraph, where you have an option to scale the values in HyperGraph.
  27. Hello, I need to multiply a number in my input values and then draw its curve in Hypergraph. How can I do that ? I appreciate your help. Best, sara
  28. rigid wall force in hypercrash( radioss)

    Thank you so much George. I really appreciate.
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