Search found 122 matches
- Wed Feb 24, 2021 11:12 pm
- Forum: FEM
- Topic: FreeCAD as pre-post processor for MBDyn
- Replies: 433
- Views: 172537
Re: FreeCAD as pre-post processor for MBDyn
Hi. Can anybody spot my error in the next input file for MBDyn? There are two nodes, one static at the origin and one dynamic at (0.02, 0.02, 0.). The static node is clampped, and both nodes are attached together through a deformable displacement joint. Both nodes are parallel to the global referen...
- Wed Feb 10, 2021 1:52 am
- Forum: FEM
- Topic: FreeCAD as pre-post processor for MBDyn
- Replies: 433
- Views: 172537
Re: FreeCAD as pre-post processor for MBDyn
Hello Jose, From the mbdyn documentation, the direction of the in line is given by the direction 3 of the orientation matrix. (Sextion 8.12.25) And the orientation matrix can be defined as Dir1,x,y,z,dir2, guess In this case dir1 should be 3 And x=xp1-xp2, y=yp1-yp2, z=zp1-zp2 And dir2 could be 1 o...
- Mon Feb 01, 2021 1:27 pm
- Forum: Open discussion
- Topic: Google Summer of Code 2021 - Call for ideas
- Replies: 80
- Views: 21434
Re: Google Summer of Code 2021 - Call for ideas
Besides a 1 month timebox, another main goal of projects is to get students engaged in the community so that they stick around. So, projects should not just be tough things that need a chunk of time to do that weekend contributors can't muster, they should also be educational or interesting to enga...
- Fri Jan 29, 2021 3:11 pm
- Forum: FEM
- Topic: FreeCAD as pre-post processor for MBDyn
- Replies: 433
- Views: 172537
Re: FreeCAD as pre-post processor for MBDyn
Yes I have also been thinking the total joint would be easier to use, because we would only have to program one scripted object to create a total joint within FreeCAD, and use it to model a wide range of assemblies, however my attempts to do so did not go well. Total joints have more parameters to ...
- Fri Jan 29, 2021 2:38 pm
- Forum: FEM
- Topic: FreeCAD as pre-post processor for MBDyn
- Replies: 433
- Views: 172537
Re: FreeCAD as pre-post processor for MBDyn
Hi. It is great you were able to reproduce the pendulums! Even considering I still didn´t make a tutorial. One key idea of the working process Is to create simple (non-parametric) parts before you set a simulation. The reason is that I sometimes find problems when obtaining the mass and inertia of ...
- Thu Jan 28, 2021 6:31 pm
- Forum: FEM
- Topic: FreeCAD as pre-post processor for MBDyn
- Replies: 433
- Views: 172537
Re: FreeCAD as pre-post processor for MBDyn
What do you think about Assembly3? It works quite nice in our production line. Do you think the efforts can be merged (or shifted to Assembly3)? I thought about how to use MBDyn with an assembly workbench that uses a solver. I wondered if it would be easier to use an MBDyn joint element called the ...
- Thu Jan 28, 2021 1:28 pm
- Forum: FEM
- Topic: FreeCAD as pre-post processor for MBDyn
- Replies: 433
- Views: 172537
Re: FreeCAD as pre-post processor for MBDyn
This is an idea I´ve had in mind for a while. I have seen people struggle to write an assembly workbench for FreeCAD for years. There is assembly 2, but it only works for assembies with few parts and it often cannot solve relatively complicated assembies. Assembly 4 is a nice tool, but the lack of ...
- Thu Jan 28, 2021 11:19 am
- Forum: FEM
- Topic: FreeCAD as pre-post processor for MBDyn
- Replies: 433
- Views: 172537
Re: FreeCAD as pre-post processor for MBDyn
I tried your workbench and was able to create a single pendulum and a double pendulum that ran the simulation successfully. The animation only worked for the single. Though the code works there are errors generated with many of the commands The error I got trying to animate the double pendulum was, ...
- Mon Jan 25, 2021 1:23 pm
- Forum: FEM
- Topic: FreeCAD as pre-post processor for MBDyn
- Replies: 433
- Views: 172537
Re: FreeCAD as pre-post processor for MBDyn
I´m glad you were able to run the examples. Yes, I am working on a quick tutorial on how to perform the "free-falling body" simulation first. I think it will be a video tutorial, because it is way easier than a written document and because I am sure the workflow will change quickly as the...
- Wed Dec 30, 2020 1:40 pm
- Forum: Open discussion
- Topic: Using Github to store files
- Replies: 5
- Views: 1228
Re: Using Github to store files
A problem with github for this is you have to download the whole repository; you can't just pick one file.