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Showing most liked content since 06/28/20 in Posts

  1. 1 like
    these are originally 4 geometry points in each circle, so HM forcelly creates nodes on them. I've created them as fixed points in the 'quick edit' panel. selecting one line and adding a N points. Usually circles have only 1 point. You can add 3 more.
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    correct. 2nd model was stiffer thatn the 1st one. This image was just a display, not the real section. I went to Preferences and turned on visualization for 1D elements as a cylinder.
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    I think I didn't get what you see as a problem. Running your model as it is, this is what I got (just adjusting the legend a little bit, and adding a couple 'measures'). By adding a RBE2 you're essentially imposing that the same ZERO displacement (SPC 123456) of the central node will the carried to the 3 nodes connected to it. Which is exactly what you got here. For sure you should look again at what are the BCs in your real structure and try to bring them to your model. There is some stress in the whole structure, although it is low compared to the stress in the red regions. For buckling you requested only the 1st mode, which is ok, as it is the lowest one, but you would probably want to look at others too.
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    there is a toolkit called HWTK in HW installation. They might help you to get started.
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    Try: "C:/Users/Nutzer/Documents/Studium/zz_IAV/z_Test/Skript_einlesen/test.UFF"
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    HI Alfonso, Kindly follow all the steps given in the tutorial file and you would get the answer. For maximum shear (in HV) you can select "MaxShear" as shown below: Thank You
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    did you change the optimization setup from free-size to size? In terms of responses or contraints? Remember that free-size is a conceptual optimization only, and the most important thing from it should be 'where' to place fiber layers, and not exactly how thick. Thickness should be given by size optimization, including your more detailed deisgn criterea. It is normal to change thickness values from one to the ohter. You should look if your design and manufacturing constraints are respected in the end.
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    Awesome! The video is also helpful. Thanks for sharing this.
  9. 1 like
    Hello everyone, Regarding some Shock's analysis demands, I've decided to facilitate and automate (using Activate) the task to obtain the expected Shock Response Spectrum curve as below: This model will be very useful for those who are intending to do some Shock's analysis, even a linear approximation using the amplification factor on a certain frequency, as a Response Spectrum covering all the frequency domain. Basically the inputs are the Half-sine and System properties: Sine: Magnitude, period, phase. System: Mass, damping, stiffness. After set them, you'll just have to click 'Run' and then 'Execute'. Besides the traditional plots (Acceleration (G) vs. Frequency (Hz)) you will already have the 'TABLED1.fem' to be used on OptiStruct, as can be seen in this video. Thanks for @robertavarela, @RoKet and @Adriano Koga for some tips regarding the modeling. Hope this be very useful for you all! Please, let me know if you have any question about this model (attached). João. Srs_curve_model.zip
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    You should also look at HyperWorks CFD 2020 as it will have similar look and feel to VWT, but with much more general capability.
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    Hi @Nadzrin, The advancing front vs. Delaunay triangulation discussion actually refers to the surface meshing. AcuSolve doesn't have much of a preference either way when it comes to surface meshing. The runtime argument I made is in reference to the volume meshing (AcuConsole's octree vs HW-CFD's approach). In this case, the linear solver *should* perform better with the mesh from HW-CFD. Note that the performance won't be radically different between the two approaches, but according to our linear solver experts on the AcuSolve team, the more random mesh is beneficial. Would be an interesting test for someone to run. and report the results!
  12. 1 like
    Right. AcuConsole's mesher will create octree patterns in large open regions. That mesher works as follows: 1.) Create surface mesh using the delaunay triangulation approach 2.) Extrude boundary layers from the surface into the volume regions 3.) Build octree mesh in volume regions 4.) Connect the surface/boundary layer mesh to the octree regions using delaunay or advancing front technique. However, the question is what you feel is superior about the octree approach. The structured nature of an octree mesh is not beneficial to AcuSolve. The randomness of the nodal positions in the HW-CFD mesh tends to make the linear algebra less stiff and can actually lead to faster run times on meshes of similar node count. Additionally, the 2:1 size jumps that are present in the octree mesh can cause a stiff linear system in AcuSolve as well. Overall, you should see that the HW-CFD mesh performs better in the solver, and is also faster to generate due to the more effective use of mult-threading. I'd be interested to hear if your experience is not consistent with these expectations.
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    Short answers for now, as I cannot open the HM right now. 1. Yes you can use AcuSolve without fluid. You can define Material_Type= solid for Air. This will essentially create a "solid" with properties of air, however only conduction will take place. 2. Contact definition between two surface is default Flux = 0. This means that there is prefect contact between two surfaces and conduction will take place without any thermal resistant (like air gaps or glue). If you need to define free convection, then all AcuSolve preProcessors have options to define those as well.
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    The last release of VWT for AcuSolve was with 2018. You download that from connect.altair.com I am not aware of any method to use VWT 2020 for AcuSolve.
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    「上下左右(↑ ↓ ← →)キー」や、「Ctrl + 上下左右(↑ ↓ ← →)キー」を押すとモデルが回転しますが、マウスを使わずに真横や上下に移動するキーは標準では割当たっていません。 上下、左右に移動するショートカットキー設定用のTclファイルを投稿します。 ①File⇒Run⇒Tcl/Tk scriptから、当ファイルを実行して下さい。  ※Tclファイル名を、「hmcustom.tcl」に変更して、HyperMeshの作業フォルダに置いておけば毎回実行する必要はありません。 ②Shift + 上下左右(↑ ↓ ← →)キーを押すと、真横や上下に移動(Pan)ができます。  ※一回の移動量は、Option設定のrotate angleを参照しています。 HM_ViewPanHorizontalVertical.tcl ※ファイルのダウンロードには、当フォーラムサイトへの「Sign in」が必要です。 ※HyperWorks Xでも同様に動作します。
  16. 1 like
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