Best Of
Re: Eror EDEMCal_No EDEM executable found
Hi Isabel
In the EDEM executable field, you will want to specify the full path of the EDEM executable. Generally, it is in your EDEM installation. For example, for me, it is "C:/Program Files/Altair/2022.3/EDEM/bin/edem.exe".
Hope this helps.
Thanks,
Jerrin Job
Re: Lattice Structures Export
I believe that there is a tcl script in the file exchange that can create cylinders from the tapered 1d elements. From there you can export the cylinders as stl objects and then use another software to merge them all together (meshmixer). Another method that might work is by using Altair Inspire to automatically generate the stl file with the lattice beams.
etrud011
液体の影響を考慮した振動解析には MFLUID 仮想流体質量の使用が簡単です。
概要
OptiStruct には MFLUID という便利な仮想流体質量機能があります。仮想流体質量が何かというと、私も数式モデルをきちんと正確に理解しているわけではないので、ざっくり説明すると、
- 仮想的なポテンシャル流れ場を計算
- 圧力と加速度の行列から、仮想質量行列を生成 (F=Ma から M=F/a を求めるイメージ)
- 仮想質量を追加した状態で固有値計算
となります。
流れ場を計算するなんてなると、流体部分のモデリングまで大変だなあと、思うかもしれませんが、実際の作業は、液体に接するサーフェスに MFLUID カードをくっつけるだけですので、モデルとしては見た目、普通の構造モデルと何ら変わらないです。下図は丸い筒のモデルですが、普通のシェルモデルであり、流体メッシュは必要ありません。
検証情報
実際に、上図のモデルを使った検証モデル、検証データがオンラインヘルプにてユーザー様向けに公開されています。リンクをたどってもらうと、実験とかなり良く一致していることが分かります。検証モデルですが、MFLUID 設定の例としても利用できます。
制限
何にでも合うと言うわけではなく、制限もあります。こちらに詳しく記載があります。
粘性、渦のないポテンシャル流れですので、イメージ的には深い水を静かに揺らすようなイメージになるかと思います。スロッシングでバシャバシャするとか、液面が浅くてバシャバシャする、水を叩くような挙動に適用してしまうと、かなり実験とは結果が変わってくるかと思われます。
それから、液面はフリーである必要があります。閉じた空間に完全に水で満たしたような物体に使ってしまった場合も、かなり実験との差が出てくると思われます。
実験と見比べて、適用するしないを決めてみてください。
Community Magnetics Fireside Chat Session 2: AMRFEKO Feature in Feko - Coming Soon!!
Get ready for our second Community Magnetics Fireside Chat for High-Frequency Electromagnetics that is coming up on February 22nd, 2024 at 10 AM Eastern Time.
In this session, you will learn how to use the new AMRFEKO tool that enables automatic adaptive mesh refinement based on error estimates for FEM and MoM/FEM solutions. The fully automatic tool can be launched from a command prompt or any of the Feko GUIs and can also be used on HPC resources in a similar fashion to RUNFEKO.
Some time will be allotted at the end of the presentation for Q and A with our industry experts.
Re: Ansys CFX having trouble reading in mesh
As per my experience, the most compatible way was to export Fluent .msh file format from HyperMesh or HyperMesh-CFD and import this in CFX
ydigit
Re: Issue with Shell Elements Intersecting 3D Elements in HyperWorks Simulations
It is when I am plotting the results in hyperview, during the animation it happens.
Hey Ali,
If components are penetrating during results visualization, it means lack of or improper setup of contacts between them.
Use these videos as reference:
Kind Regards,
Paulo Libório.
Re: screw load on psecimen
Hello, Luca!
You might wanna check these videos out:
I can't speak for what's right or wrong in terms of FE modeling approach, but the contacts are correctly set up.
Kind Regards,
Paulo Libório.
Do you want to learn more about Altair romAI? There is dedicated eLearning on learn.altair.com!
The eLearning course, Altair romAI eLearning, is now available on learn.altair.com!
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This course introduces users to the romAI within Twin Activate. Several examples are shown including linear. non-linear, static, and dynamic models. All input and model files are supplied, allowing the user to follow along with the demonstrations.
Want to get started? Click here to directly access this course.
liz_w
Re: HyperWorks CFD Post cannot open the .log file
Looks like the EDU version doesn't support post. (Failed to load on my side also.) You could try opening the H3D (and maybe .Log) in HyperView - but it looks like limitation of H3D in HyperView EDU is 100,000 nodes.
HyperWorks CFD EDU does open Ensight format results. If the convert tool doesn't present Ensight as a format, you can use command-line acuTrans to convert to Ensight.
acupro
Re: HyperWorks CFD Post cannot open the .log file
It's difficult to determine exactly, but if there are spaces in the directory names in that path above - does it work if you remove those spaces? (maybe Bureau perso - change to Bureau_perso, etc.) I always avoid using spaces in directory names - but underscore instead.
You can also try converting to H3D and loading that instead. In the 'Solution' ribbon, select the 'Convert' tool, point to your desired .Log file and set Output format to H3D. Select the variables of choice (or All) - then Convert at the bottom. Now in the Post ribbon you can open that H3D file instead.
acupro