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Found 15 results

  1. Hello, I have created a single element patch antenna that worked great. I made it into an array manually, according to this quote from expert MvdM on another post: "At the moment, for touching elements you need to build the geometry without using the array tool. Union the parts to ensure mesh connectivity. You can use copy and translate, but you would have to define the individual ports and voltage sources for each element." In another post, I learned from expert Mel that "The default solver for dielectrics, Surface Equivalence, is computationally expensive when such fine meshing is used. A FEM solution would be much more efficient. Instead of edge ports you would use a FEM line port with a FEM current source. Also, since the meshing is quite fine, the basis functions for the FEM should be set to first order" She referenced a video that explained that for FEM, I need to create an air dielectric so that the model will mesh properly. This is where I am struggling. I saw how to do it on the model in the video, but I am having a hard time doing this for my model. I will attach my model below. Any help will be greatly appreciated. The posts I've referenced are below. New Array.cfx
  2. Hi, I wish to integrate MLFMM with MoM and FEM. However, I am confused with the options given in the CADFEKO. In the region properties box (diagram above), there is an option for MoM/MLFMM (so I assume that MoM is integrated with MLFMM). However, in the Solver Setting box, there is another option for MLFMM Do I still need to tick the solve model with MLFMM option? I am not sure with the differences between the two figures? Is it same for FEM method as well? Thank you
  3. Hiw can we add buffet space region in fem modeling. It shows this error that I need to define some boundary region with some dielectric material.
  4. Hey guys, i really need help, because i made a part for my bachelorthesis and let it calculate in Inspire becuase i had to do a Topologieoptimization. My Part should work without any problems, because i use the same material as the parts that are already used. the whole model shows very low stresss and just in the fixation point there are some very big tension peaks which are putting my safetyfactor low. for me it looks very strange and seriously it shoul work, because my part is at the fixation bigger then the ones i will replace and at the rest of my optimized part is very low in tension. i uploaded the pictures for more clarity. I don't know whats wrong... Please help :( (the secon one is just with a smaller elemtsize)
  5. Hey Guys! I have faced the next problem when I tried to Import CAD or Fine Element Model With Mass and Inertia in Motion View. The STEP file was imported and you can see on the attached image the „bodies” but the „graphics” aren’t visible. It is written at the Graphical source that "error evaluating". I tried to import in the 2017 version of HW, but it didn't work due to importing/conversion error. What did I do wrong? Could you please help me in this matter? Thank you for your help in advance! Best regards, Tüki
  6. Hello everyone, The figures below compare the AFDEX predictions and experiments of a bevel gear manufacturing process composed of an enclosed die forging stage and a consecutive sizing stage. As this is a representative process in near-net shape manufacturing, a precision simulation is required. Figure 1: Process 1 - Enclosed Die Forging Figure 2: Process 2 - Sizing Figure 3: Enclosed Die Forging - Comparison Figure 4: Sizing - Comparison Cheers from AFDEX Support Team!
  7. Hello all ! This is my first post here, I'm a student doing my master thesis in Mechanical engineering. Here is my issue, I successfully did the tutorial in order to realize dynamic explicit analysis with the "full car" model available in Hypermesh database and also the " Example 51 - Optimization in RADIOSS for B-Pillar (Thickness optimization) " in order to understand how the ESL method works. The next step is to optimize the car crash box using he ESL method, my aim is to optimize the component called " COMP-PSHELL_1 " by Thickness optimization. I wrote the .radopt file but I encountered an issue with the .fem file. See below the error, I was not able to solve the issue. *** See next message about line 14864 from file: fullcarv5.fem "CONTACT,3,3,0,3" *** ERROR # 1000 *** in the input data: Incorrect data in field # 4. See attached the .radopt, the engine/stater file and the .fem file Thanks for your help ! Aub N. fullcarv5.fem fullcarv5.radopt fullcarv5_0000.rad fullcarv5_0001.rad
  8. Hello @Rahul Ponginan, I am new to hypermesh. When i was studying theoretically about Finite element analysis, i got to know that the calculations will be made at limited number of nodes and then the result will be interpolated to the entire domain. Can you please tell me that what is "interpolate" in FEA/FEM? I already searched in google and got some theories, but those were unable to understand. Awaiting for your reply. Thanks in an advance. Regards, Saravanan R
  9. Hello, I have been trying to excite the coax feed using a FEM modal port, however, I am seeing an error, which says "Missing buffer zone for the FEM region when decoupling MoM and FEM". Can somebody please help me understand what this error means and solution to this error ? The outer cylinder of coax is copper and the inner cylinder is a pec. Also, is there anyway in FEKO to accelerate meshing for large structures? Attached is the design that I am working on. I really appreciate any suggestions or help. Thanks. DESIGN_MOM_updated.cfx
  10. i have used FEM line port but i have gotten the following problem any suggestions, because my purpose is to eliminated the effect of loads (the loads do not be effected by the incident field) thank you
  11. Good afternoon! I was wondering whether there was some way to terminate a FEM modal port in a load matching the characteristic impedance?
  12. Comparison機能で CAD 対 CAD や、 FEM 対 FEM、FEM 対 CAD などの形状比較ができます。(コンター表示はFEM 対 CAD、FEM 対 FEMでご利用いただけます。)  ◎プルダウンメニューのMesh ⇒ Check ⇒ Elements ⇒ Comparison を選択。  ◎Source/Target entities に比較対象のジオメトリ or FEをそれぞれ選択し、Runで実行します。       ◎Review type をDistance ⇒ Applyとすると、Source と Targetのエンティティ間距離のコンターが表示されます。     
  13. Hi, I want to add temp point on my model and do analysis and then in Nastran output or fem output I can read the analysis (displacement or stress of that point), i mean in output the temp node be like a grid point or sth that analysis performed for that too. Best, Mohammad
  14. Hi, I am currently carrying out a 1D beam analysis. My results and the contour on my beam seems patchy and unclear. I have attached the file of the beam and results for you to understand. It is a distributed load of 150N between 32mm-109mm and 222mm-299mm. Could you please tell me how to make the contour line more visible. I have tried to change the range, but it did not make a difference. Thank you, Yousif 1D beam.mvw 1D beam.hm
  15. Hello everyone, I have a small doubt regarding the mesh size of the FEM solver when the material inside a 3D body (for RCS consideration) is characterized with some finite conductivity. I can see the standard mesh default for FEM is around `\lambda/10` but with a conductivity of 10 inside a material (`\epislon_r = 1`), the mesh size for standard meshing is around `\lambda/145`. Does it change when the skin depth changes? I have attached my cfx here. Cyliner_FEM_V2.cfx
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