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Victor
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Comments
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Solids are of course better if you can generate a mesh. The shells in Mecway's internal solver have a problem for certain geometries like twisted shapes, which leads to convergence failure. As far as I know, the CCX shells don't suffer from that. …
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The short answer is no. You might be able to do harmonic analysis using *STEADY STATE DYNAMICS with the CalculiX solver but a lot of it is going to be hand-entered commands and Mecway's postprocessor probably won't be able to display the solution.…
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There's no infinite boundary condition. You can model the room itself with a large coarse mesh. That's what's done in the organ pipe tutorial in the Tutorials manual. You'll still get room modes, but their frequencies will be much lower than the sma…
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You can enter a formula in each of the boxes for the direction of the displacement. For example, the X, Y, Z components being x, y, 0 respectively defines a radial displacement direction as in the attachment. It's not yet possible to use formulas fo…
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One problem is that the first 3 nodes in the node set that Mecway generates for Top_Nodes lie on a line, which isn't allowed by *MPC. Another problem which I can't explain, is that it works when your scale up the size of the mesh by a factor of 10…
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Not currently with a formula, though this is something I expect to add in version 8. A couple of ways: A) If it's a simple regular mesh, you could use multiple temperatures on layers of nodes. Do a steady state thermal solve first to obtain a…
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4GB is a bit low but it should work perfectly well with small models. Your graph shows that almost all the RAM is used simply by opening Mecway, without any model at all. I see approximately 0 memory use when doing that, so something's abnormal ther…
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I remember seeing this happen on Wine - it would work when installing but not the next time it's run. But I can't remember what fixed it. Maybe make sure .Net 2.0 is enabled? Or this could be a new problem with Mecway 7.
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Yea, I removed the MT version because of the buckling error that Andrea found. The .inp file editor is for viewing the generated file when you press the ".inp file" button on the solver panel. It won't automatically use any edits you make but you …
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Although you can't specify thickness always being from one face in Mecway, you can use Shell offset in Element properties to move the midplane to one of the surfaces. It works for both the internal solver and CCX. So you can make a surface mesh of j…
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I won't be putting load cases back in together with configurations. That's too much conceptual complexity. As for combining linear results in postprocessing, that's part of what this change is leading towards - being able to define a new field varia…
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Thanks for bringing up these problems. They include the issues that I'm most concerned about with the new configurations. Here are my thoughts: File open time: I've seen a smaller increase in load time (50%) with a similar sized model. The 10x i…
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Could you explain why different materials need it or not? It doesn't seem like it's just a function of material. For example, I've seen a recommendation not to use reduced integration on tet elements, and also not to use full integration on hex8 ele…
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No, but I'll try to put CCX strain in for v7 final if it's simple. The experimental part of reduced integration is that I don't know where to put it. I don't know where to put it because I don't know how it would be used. Maybe per component if it…
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I just found that CCX's *TIE seems to be quite happy with constraints sharing its nodes. Sometimes it appears to release the contact where constraints are on slave nodes but not always. You can easily get bonded contact in to use *TIE by checking th…
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That's a good idea to have it automatically remove the conflicting nodes. It won't be quite correct unless the constraint is on all DOFs so it would need to come with a warning, but still a worthwhile compromise. You can use the GUI to remove the …
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Yea that would make sense, but really it should not even make time=0 available at all when there's no data there. That's more of another problem for a future version.
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While I can't answer your questions, that's a nice comparison! It's reasonable to expect speed to plateau. I don't expect that CCX is particularly optimized for running in parallel, unlike a supercomputer code. It's hard do that and probably not wor…
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Oh, yes there is sorry. 32767 characters in version 6. I've removed this limit for the next release of version 7.
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I see it happening now by solving several times, on both your model and one I made. Thanks for discovering this and isolating it to the multithreaded version! I'll try compiling with lower optimization or remove it if it's still going wrong.
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Is that the ccx_MT.exe with Mecway or from Kwip? I can't reproduce the problem. Do you mind sending me a .liml or .inp file that does it? If it's going to be unpredictably wrong like this, I'd better remove it from Mecway.
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I'm still not sure quite what's happening with Salome and whether it's a good idea to assume all .unv units are unreliable or not so I've added a persistent option in v7 beta 3 in Tools -> Labs -> Ignore units in .unv files which causes it to …
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Beta 3 fixes the problem of stopping the solver to start a new solve. Instead it just won't start a new solve until you cancel the running one.
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Thanks for the feedback. It currently doesn't let you solve two configurations at the same time. I'll look into it stopping the first solve because that doesn't sound like very good behavior. I've also compiled the multithreaded version (ccx_MT.ex…
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There are two possible things happening here: A) Is it just showing a different default choice, so that you can easily switch to mm to read them? or Is the physical meaning wrong, so that what should be 1 mm ends up as 1 m or 1000 mm? For A),…
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Yes, that's a missing feature of Mecway 6 sorry. However, version 7 which is now in beta does write *FILM for convection but not *RADIATE. Thanks for posting the Excel VBA code to generate them. http://mecway.com/forum/discussion/401/version-7-beta
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This is beta 2 which fixes those two bugs: http://mecway.com/download/mecway70beta2.msi
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Thanks for finding these bugs with configurations. It should show two different results. I've been able to reproduce both the corrupted display and the common solution for both configurations and will fix them for the final release of v7. For the se…
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You can copy the first 10000 lines of a large file quickly in PowerShell with: gc -TotalCount 10000 InputFileName.liml > OutputFileName.liml The number of lines for the model will be more than the number of nodes plus the number of elements…
