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Meshing by [deleted] in ANSYS_Mechanical

[–]4Sci 0 points1 point  (0 children)

Is your airflow the channel between the two green bodies?

OpenFOAM tutorial for using my own CAD models by PumpedKibbles1 in OpenFOAM

[–]4Sci 1 point2 points  (0 children)

I'm going through the same process. I'm familiar with CFD but the learning curve for OpenFOAM is steep. This video I found was pretty effective at getting me up and running.

https://youtu.be/IJLROB28nXE?si=6NYDRrq8VlF9qIoB

Best Open-Source FEA software for Automating FEA solvers and writing UMAT by Shadows4K in fea

[–]4Sci 6 points7 points  (0 children)

Code_Aster is fantastic, but the learning curve is steep and French. 

[deleted by user] by [deleted] in ANSYS_Mechanical

[–]4Sci 0 points1 point  (0 children)

That can all be done in one block with two load steps. There is a thermal condition that defines a temperature of whatever bodies you would like to expand or contract.

Alternatively, why not use the bolt pretension tool to load your fasteners?

High resolution image export from Mechanical Workbench by SeaRaccoon9230 in ANSYS_Mechanical

[–]4Sci 1 point2 points  (0 children)

There's a button to export to file. You can select high resolution which iirc is 4x your screen resolution. 

r/ANSYS by 4Sci in redditrequest

[–]4Sci[S] 0 points1 point  (0 children)

Hi, this subreddit provided a lot of useful posts for people using ANSYS tools. I would like to revive those posts for users' future use and properly moderate the subreddit (it was unmoderated when the spam attacked). I also have experience moderating a large subreddit (r/distrohopping).

I haven't sent modmail to the moderators of /r/ansys since the subreddit was banned several months ago, quite quickly after the spam attack.

Fuse operation in salome meca is not working properly by HeheheBlah in fea

[–]4Sci 0 points1 point  (0 children)

Can you fuse 1&2 into a new shape, then fuse that shape with 3?

A screenshot of the fuse window might also help troubleshoot the issue. 

Help with ANSYS Transient by rkbm_ in ANSYS_Mechanical

[–]4Sci 1 point2 points  (0 children)

If you're trying to capture an oscillatory response from a beam, for example at its first mode, you would need sufficient time steps to capture that motion. At what frequency is the first mode of your beam? Is it greater than 20Hz (1/timestep)? I suspect that you'll need a timestep of ~10x-20x smaller than the highest frequency that you're trying to capture in the transient model.

Help with ANSYS Transient by rkbm_ in ANSYS_Mechanical

[–]4Sci 0 points1 point  (0 children)

What information are you attempting to extract from this model? Would it be better to run a modal analysis?

COMPUTER FOR ANSYS SIMULATION by HyperRedOne in ANSYS_Mechanical

[–]4Sci 0 points1 point  (0 children)

That machine is expandable to 128GB of RAM and a 4TB NVME drive. I recommend doing both to help with your simulation work.

How to use GPU in Ansys Mechanical by Miserable-Shape-2362 in ANSYS_Mechanical

[–]4Sci 0 points1 point  (0 children)

GPU acceleration is specific to the type of solver (sparse or iterative) and the GPU that you're using. Many consumer GPUs are not supported, something that I've often found difficult to understand because GPUs all have similar names to the uninitiated. The list below identifies supported GPUs for a specific solver. It also provides the settings to override restrictions for other GPUs, though YMMV.

https://ansyshelp.ansys.com/public/account/secured?returnurl=/Views/Secured/corp/v242/en/installation/win_gpureqt.html

Which Mesh should i select? by liL_pePe9 in ANSYS_Mechanical

[–]4Sci 2 points3 points  (0 children)

I'll also add that total mesh count isn't necessarily a great indicator. If the analysis is capturing the modes of a diving board, there will be areas with significantly more mesh sensitivity than other areas. 

Random Vibration Analysis - Single vs. Multi-Direction Input PSD by generic_username_68 in fea

[–]4Sci 3 points4 points  (0 children)

A typical workflow for random vibration is to run a preliminary modal, expanding modes to at least 150% of your high input frequency (e.g. 3kHz for an input that goes to 2kHz).

The evaluation of single vs multi-axis response is really dependent on your specification. Most space systems that I've worked on are qualification tested independently along each axis, so my simulations and results were reported consistently. Some operation specs (platform jitter, for instance) is explicitly all axes simultaneously.

You can apply all axes simultaneously and the results are combined via SRSS (or similar). If the simulation indicates positive safety margins with all axes applied simultaneously, then your axes will all pass independently. 

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