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Found 61 results

  1. Using Hypermesh 2017, and User Optistruct. I have been trying to get the contour plots of a chassis both modeled with a beam model and a shell model to match up but the deflections of the shell model are always about 2 times as large. It should also be noted that the deflection images are nearly exactly the same with the same deflection trends but just the magnitudes are different. The following conditions are the exact same for both: forces, location of forces, constraints, overall size, thickness and material. The only conditions that are different would be the properties as the beam model is modeled with a PBEAM and assigned the correct beamsection while the Shell model is modeled with a PSHELL card and then assigned the thickness. Are there any common errors that would be able to describe why the beam model has almost exactly half the deflection of the shell model? Thanks for any Help , reply if more info is needed. Nicholas C.
  2. Hı everyone, I am trying to do lattice optimization with different types. I'm using hex mesh for design and tetra mesh for non-design. I I can see the different types of lattice in the design structure. But when I check the displacement values, I don't see any difference. Can you help me for this problem? controlarm.pptx
  3. Following the y-bracket tutorial leaves the optimisation hanging on 100% and analysis fails, saying contact support. The optimisation is definitely no longer doing anything because the process has no load on CPU. Please see attachments. Any help on this would be much appreciated. Best, Darren
  4. Hı everyone, My structure has very less weight and size. I want to lattice optimization and I do. But shape of my structure is changing. shape is very thin. I think this can be due to the weight. Can you help me? Thank you. First picture my structure, Secondly figure at the end of the analysis.
  5. Hi, Thanks a lot for your support and quick response. I am using Hypermesh with Ansys User Profile . Here I want to do the Static, Modal, Harmonic, Transient and Random Analysis. I want to give all the inputs in Hypermesh Itself. Please Guide me on this I have to give the inputs in Sinwave form. please provide me any link for tutorial. Thanks in advance for your valuable support.. Thanks, David
  6. Hello, I would like to extract the node point stresses after an analysis using a tcl script for further analysis in Matlab. Control cards only allow me to export the GPSTRESS as HM or H3D which is not useful for running an analysis outside of hypermesh and hyperview. What functions should I use to accomplish this? Or is there an easier way? Thank you, -Eric
  7. Hı, I'm doing lattice structural optimizations. Lattice type 1 and 3 is working but 2 and 4 are not working. I get this error. Can you help me? Thank you.
  8. Hi, I used incremental radioss - crashform for simulating the component. I have the .hf file, .sta file, .rst file, .rad and animation files. I should run the springback analysis for the component. I am not able to get the springback result. I should evaluate the springback and the springback compensation. Kindly help me. It is urgent. I have attached with the files for your reference. Thanks in advance. Final_Simulation_26.rar
  9. Aslan

    Static Analysis

    Hı I am trying to analyze with very easy model but I am getting an error. I don't understand why is it causing the error? I'm sharing my file. Thank you. 1.rar
  10. Hı, My question, what is the difference between the following options. These results are calculated according to what? Thank you.
  11. Hi there, I've run a simulation of the chassis of a car through Optistruct in Hyperview, and there were no errors and everything seemed to run well. However, upon loading into Hyperview, I am unable to view the contour plots for stress/strain/displacement and the four subcases. I am expecting to get a model like Image 1, however am getting image 2. It is as if there are no loads applied to the chassis. If anyone is able to view the model (file attached) and perhaps indicate where I am going wrong it would be greatly appreciated. Cheers Chassis_scaled_newI.hm
  12. Hello all, For stress analysis, I want to show the stress value of some nodes, in order to make a screenshot for documentation. To do this I put a note on the selected node, and in the note i write {entity.contour_val}. Now the problem is, that i get the value of the selected node and all of the nodes surrounding it. But i only want the stress value of that particular node. Does anyone know what to do? Thank you in advance.
  13. Dear all, A month ago , i am using OPTISTRUCT solver to conduct Normal mode analysis. we have changed the solver from Nastran to opitstruct. so i have few questions. 1.with using one optistruct license, is it possible to do multi tasking. ( Means, to conudct two or more analysis at a time). 2. is it possible to increase the speed of analysis. because i can see the cores & processors option. 3. Any import tips or tricks to ease the analysis process. if you guys know the answer for any of the above question. please do let me know.
  14. Hello everyone I would like to know, what is the difference between creating a constraint, set its Card Image to TEMPD, set T1 with the temperature and to create 'temperatures' and set the value to the temperature? I thank you in advance for your help!
  15. Sp108

    Bearing Analysis

    Hey! I am trying to perform a structural and transient analysis on a Roller Element Bearing model. I am able to perform simple static analysis but I would like to utilize Hyperworks to simulate the following conditions: Inner race to be rotating with a constant velocity and a fixed radial load is applied. Outer race is fixed. The balls should also be rotating. I wish to know how I can give a constant velocity to the inner race of the bearing while also allowing the balls to rotate. What kind of contact constraint should I apply. Right now I am working with freeze contact only. There is one video but in a different solver which does what I have been trying to do. I wish to do it in Hyperworks. Here is the link: Also please suggest whether optistruct's non linear can be used or whether I should switch over to a different solver module! Cheers
  16. I've been recently working on a Knee joint model . I need to find the contact force vector between two particular components. I have been getting a lot of errors and unable to run the model. All the contact pairs and properly defined and I am able to generate all typical outputs except for contact output. please help me out. The output blocks defined so far are node and element outputs for all 8 components defined. Thanks in advance!
  17. Hello, I am using hyperform to evaluate the springback compensation of a component. I created the parameters and saved the '.hf file'. Then while running the analysis with the saved .hf file, the command prompt opens. It could not run the simulation. It shows the error 'noh3d -nproc 1' and 'the system cannot find the path specified'. Have attached with the screenshot of the error. Kindly refer to it and help me regarding this. Thanks in advance.
  18. I have designed a patch antenna which is operated using proximity feed. After running, in POSTFEKO the realised gain was very low despite "good" gain values. When I checked the current activity using Currents requests, I found out that only a little current is induced in the patch. I'm running FEKO 14. I have no idea what's wrong. Any help will be appreciated. Thank you.
  19. Hello, I am using Optistruct to numerically calculate some FRFs. I have test data to validate my numerical results. Measured test data is an FRF data in the form of Inertance (acceleration/force). I see that there is a big gap in frequency components' amplitudes between the measured data and numerically calculated data, though calculated and measured natural frequencies align very well. I have followed the modal frequency response tutorial and nowhere in the tutorial is it shown that we're specifically selecting the type of FRF we're wanting (e.g. inertance or mobility or receptance). GLOBAL_OUTPUT_REQUEST is used with DISPLACEMENT enabled and that makes me think that, what I am calculating in Optistruct is Receptance and not Inertance. I tried to request ACCELERATION instead of DISPLACEMENT, but ACCELERATION doesn't let me select the output node set which I used for DISPLACEMENT. How can I make sure in Optistruct that the numerical data I'm getting is inertance and not mobility (velocity/force) or receptance (displacement/force)? Best regards
  20. Hello HyperWork users. I have encountered a problem with Radioss analysis, somewhat connected with my license. Due to lack of separate Radioss programe in SE, we've built engine inside HyperMesh and tried to run analysis. However, each time I run Radioss message below pops up. I've checked ipconfig/all with license already (since I changed Internet provider), as well as re-downloading license file and substituting it. At this point, I honesly strive for any new idea what might be wrog with it. Provided, you need my in- or output files, I may attach them in the next post. Many thanks in advance for your help. EDIT1: I attached files. LICZ_0000.rad LICZ_0001.rad
  21. Hi Everyone, I am working with Optistruct for my Linear/Static Analysis, I am doing Topology Optimization in my model but before I wanted to check whether my model is working regarding with displacement or stress result for my BCs. but after analysis result it shows nothing every displacement result is zero and no change. Can anyone take a look into my model whats wrong or what change I have to make. I used Hex mesh, with 4 Loadcases and one constraint. I have attached my model for the expect reference. It would be much apprieciated if i get any positive response. Thank you in advance. Regards, Muthu.
  22. I need to find the total strain energy of each component in my FEA model. Is there any tutorial about it?
  23. VigneshKPV

    Solution Stability Issue

    Hi, Mesh independent study is performed for one operating point to fix the mesh count in one of my problem. The final fixed mesh count result was deviating by 1.5% for the selected operating point. The final fixed mesh is used to simulate for other operating points and their results deviate between 10-30%. To check the consistency of the result the simulation is conducted for different operating point to check the stability of solution and found result changes with huge deviation. If this problem persists on my cases, it would be difficult for us to relay on the tool. Requesting you to arrange for a meeting to discuss in detail about this issue ASAP. Regards, Vignesh V.
  24. Dear all I need to know how to use connect for weld condition. Do you have any example or method for use this function ? such as : Arc welding or Seam welding ?
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