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Nimisha Srivastava

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About Nimisha Srivastava

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    Altair University

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  1. Hi, The y+ value depends upon the accuracy of solution required in the near wall region for your simulation and also the turbulence model chosen. Spalart-Allmaras, the standard acusolve wall function, can handle y+ values below 300.
  2. Hi, Could you please share your model?
  3. Hi, You can export the model as a .step file by changing the file type while saving it.
  4. Hi, This should not be much of an issue if you make smaller PolyNURBS block and use the bridge tool in PolyNURBS. You should take care that the blocks are not intersecting. Please refer to the online help by pressing F1 while hovering over the PolyNURBS tool icon to get a better idea on how to use the tool.
  5. Hi, For making the optimized parts transparent instead, select the optimized part and look at the Property Editor. Go to Appearance and increase the Transparency to whatever percentage you are comfortable with. You may also change the color in accordance to your preference.
  6. Hi! 1. You can choose the degrees of freedom allowable for a given connection in a model by creating a support. For instance, if you need a part to rotate freely but not translate, you may apply a cylindrical support on it and double click on it to allow the rotational d.o.f. Step 1: Create the part which needs to have free movement in a d.o.f. separately as a "New Part" Step 2: Apply a support (this will restrict movement in all d.o.f.) Step 3: Allow movement in a d.o.f. by double clicking on the support and clicking on the desired free d.o.f arrow such that it becomes green If you want your parts to not be "glued" together, you may change their nature of bond from the contacts option into contacting instead of bonding. 2. You may specify a maximum magnitude for displacement by using the Disps option in the structures ribbon. Please share your model and ask on this thread for more help. Thanks
  7. Dear Sir or Madam, I contact you to get some information and adivces regarding my Inspire model that contains several solid parts: 1/ In order to increase the representativeness of my simulations, I would like to configure the connections between different parts by specifying for instance the allowed d.o.f. for a given connection. Is it something achievable on Inspire ? (Because for the moment, all the parts are -by default- simply "glued" one to the other according to the initial CAD model) Otherwise, what are the best way(s) to simulate these connections ? (By using connectors or forces, for instance ?) 2/ For an optimization, is there a way to specifiy directly or undirectly a maximal constraint value for the entire volume (or the design space or at least some specific points) along one direction, or a Von Mises value for instance ? (I am not sure about this but I think it might be possible on HyperMesh and not on Inspire, isn't it ?) Otherwise, how to take it into account for the optimization constraints? (For the moment I have specified some general displacement constraints at given points but is it possible to better constrain it ?) Thank you very much in advance for your time and your answers, Best regards, Bastien Jamain Student in Advanced Master at ISAE-Supaéro
  8. Hi, Please share your model. Apologies for the late reply.
  9. Hi Will, Kindly share your model. If you're unable to analyze the model at all then it is likely that your problem is also caused due to the student license, if that is the case then you can follow the steps mentioned in the earlier reply. Reply on this thread for further clarification.
  10. Hi, Depending on your model and specifications, the simulation may take many hours for completion since VWT conducts a 3D CFD simulation. Also, the status bar does not keep track of each and every completed process as the meshing and solving is done using other software in the background, hence the progress shown there might be inaccurate. If you wish to check whether or not the simulation is progressing at all kindly have a look at your progress log file which will be in your run directory. For accessing the log file, follow the steps mentioned below: Go to File > Preferences > AcuSolve and copy the address of the folder in the Run directory field Go to the latest folder in this location Go to the file named vwtAnalysis.1 and open it. This is the log file where you can get the status updates. If the log file does not show any progress at all then consider increasing the element size of your mesh to reduce the computation time and also try running a steady simulation instead of a transient one
  11. Hi Kartheek, Seems as though there are some modelling issues with your current model. From the model, I gather that you are trying to optimize the lower part of a sandal. I am attaching the solved and optimized model and also, here is a list of rectifications you can make while running your own optimization. Use a pressure load instead of a point load as that defines the pressure of the foot more accurately Use a support on the lower end of the model to constrain it as opposed to using the supports on the upper end of the model Here is an image of the optimized model: lower_part_Inspire_Solution.stmod
  12. Hi Luca, You cannot import results into Inspire, although you can go ahead with your investigation by using Inspire to analyze as well as optimize the model. You can directly import the .fem file generated from HyperMesh with all the loads already defined. To export a .fem file follow these steps: Complete the model set-up and meshing in HyperMesh Go to File > Export > Solver Deck > Choose a name > Choose OptiStruct (.fem, .parm) and click save Import the .fem file so generated in Inspire and click on Analyze in the Structure ribbon. Then after the analysis, click on Optimize in the Structure ribbon to get the optimized shape. Alternatively, you can directly import your CAD file in Inspire directly and then proceed to set-up the loads and supports, and then Analyze and consequently Optimize using the Structure ribbon. Please reach out if you need any further clarification.
  13. Hi Alberto, Inspire uses the same optimization algorithm as OptiStruct.
  14. Hi, The log file for your model suggests unrealizeable loads and boundary conditions. I see that you have applied the loads on a point which is a part of the housing encasing the gears. Try applying the load directly on the gear shafts instead. ' Please refer to this topic for clarity:
  15. Pritish, Click on the three dots beside the License file entry field. Upon clicking on the three dots, the browser window will open up. Find the place where you have saved the new license file and then select it. Click on open. Now, the new license file will be referenced. You should be able to run the analysis and optimization successfully now.
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