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JohnM
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The 'needs a thickness" likely means the mesher only got through the surface meshing. I would try and identify where the mesh is struggling and see if you can improve the CAD Sometimes it is one little blend that makes it choke. You would not wan…
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Use the Pastix solver, available pre-compiled on the Calculix website ( the "files" link). Link to the ccx_dynamic.exe executable. You can use the CCX solver switch to change to Pardiso if necessary.
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I see some that I asked for, I like others I didn't, thanks for the updates!
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Take a look at this: In CCX, shell elements are expanded into hex8 with c3d8i shape function We usually use hex8 with the CCX option to use c3d8i option (see CCX in tree) hex8 c3d8 are too stiff in bending hex20 c3d20R are supposed to be a very …
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First of all, rest assured you've picked a good software. we have many users and have been effectively applying Mecway for many years now. I would recommend simcommons.com and the other references you will find on YouTube for a quick start. I thin…
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calc_em gave the missing detail on the calculix forum - the ROT NODE is the node that needs to be referenced. I have attached a test file that demonstrates the method. Thanks to you as well @sergio!
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The frd file is usually a simple text file. if you look at the format, it should be easy to strip away the top two thirds of the solution to get what you've been looking for.
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What Victor said. This is an example that will run for 0.2s with no output, then run with output set by FREQUENCY for the remaining 0.1s. To make this input file, click "=" the look at the end of the input file. If your dynamic run is in "free f…
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@VMH look at new post https://mecway.com/forum/discussion/1373/easy-upgrade-tips-re-do#latest you may find useful
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http://www.dhondt.de/calculix_2.20.1_4win.zip this file is linked on the dhondt.de site, a hyperlink simply called "files"
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Nice!
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Open Foam comes down to surface preparation and selecting the right template. The SimCommons approach uses Mecway to identify different patch surfaces of an STL surface, then uses Linux scripts to pull the right template and combine with the geomet…
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The two pendulum problem is a subset of something I posted on LinkedIn recently. It's the Newton pendulum toy. It's simply a demonstration of the problem we have with time stepping. The large motion of the end pendulum coming down does not require f…
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@disla thanks for joining the dynamics misery club! All of your points are understood and appreciated. we do drop testing with CCX, we impose gravity and initial velocity, and the part is positioned a fraction of a millimeter before the floor. Thi…
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if you use a text editor to open the liml, you can remove any paths and leave the file as simply "shaft.stp", which will look in just the local directory.
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Very nice!
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We use Optimax, and it works well. We use a load cell machine (Lloyd) to obtain a load deflection curve. This test setup gets modeled in Mecway, and the C01 C10 coefficients are made variables (I think we go straight to the CCX deck at this point)…
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In the past I have used NASCRAC which creates a crack growth rate based on a stress field and da/dn material data. However, I recall there was a method in ANSYS that used higher order elements, with the midside nodes to a "quarter point" at the base…
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Ok here we go again. Attached is a simple model run using nonlinear dynamics (*DYNAMIC in CCX). We have run models this way for a while, and the process gives us reasonable design input for things like drop tests or assemblies with dynamic effects.…
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Very nice.
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4:45 PASTIX Intel i5-12500 3.00 GHz 64GB using 6 proc 6:31 PASTIX Intel i7-10700 2.99Ghz 32GB using 6 proc
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Don't overlook the new forced convection features!
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I think this is BETA but this might solve your problem in the next release:
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I will second the comments about the unpredictability of where modes might occur. Even with a mature design, someone introduces a cooling passage in a tip shroud, or a change to the squealer tip, a modification to a damper casing, and suddenly you d…
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For 20 years I worked on gas turbines, and we used cyclic symmetry in ANSYS. The blade/bucket engineers were fixated on some "classic" trouble spots, like N=2 lower modes that were damper wear issues, but we always produced a huge map of modes for …
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That does sound a little strange. I would expect the meshes to be identical, but does the offset affect that somehow? Are the messages identical?
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If you are designing a rubber collar for a rotating seal, those are the kind of things to watch for. If you are designing a rubber ball, I think you're good
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Plot your Z displacement on the top (non-impact) side of the sphere, I think you catch a higher order flexing mode of the sphere
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I use TetGen for difficult STL. It identified two small areas with self-intersecting shells, which nothing will want to mesh. Once corrected it meshed fine.
