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by josegegas
Tue Sep 10, 2019 4:04 am
Forum: FEM
Topic: FreeCAD as pre-post procesor for MBDyn
Replies: 95
Views: 7288

Re: FreeCAD as pre-post procesor for MBDyn

I've been using MBDyn to do simulations of engines and other mechanisms. It is a free and open source multi body dynamics software. It is very powerful but it lacks pre and post processing graphic interface. I've been using FreeCAD as pre and post processing tool for MBDyn and all works very well. ...
by josegegas
Tue Sep 10, 2019 3:38 am
Forum: FEM
Topic: FreeCAD as pre-post procesor for MBDyn
Replies: 95
Views: 7288

Re: FreeCAD as pre-post procesor for MBDyn

MBDyn license is GPL so it would have to be installed separately, ok, but it seems like default installation packages are only for linux? I've never used MBDyn on Windows. Not sure if there are installation packages... I don't care much about this :P MBDyn is such a nice software and if we could in...
by josegegas
Tue Sep 10, 2019 3:14 am
Forum: FEM
Topic: FreeCAD as pre-post procesor for MBDyn
Replies: 95
Views: 7288

Re: FreeCAD as pre-post procesor for MBDyn

One issue with using FreeCAD for multibody dynamics is there is no routine to calculate moment of inertia for arbitrary shapes(part design); that would need to be written. Yes, I found this to be a problem. By now I am using my own code to calculate inertia moments, only for basic shapes (spheres, ...
by josegegas
Tue Sep 10, 2019 3:05 am
Forum: FEM
Topic: FreeCAD as pre-post procesor for MBDyn
Replies: 95
Views: 7288

Re: FreeCAD as pre-post procesor for MBDyn

I would not need a constraint solver because MBDyn would notify if there was a problem. I also thought it would be difficult to translate constraints from assembly 3 or A2+ into MBDyn joints. I thought exactly the same. There is no need for constraint solver because MBDyn already does this. My idea...
by josegegas
Tue Sep 10, 2019 2:59 am
Forum: FEM
Topic: FreeCAD as pre-post procesor for MBDyn
Replies: 95
Views: 7288

Re: FreeCAD as pre-post procesor for MBDyn

I was going to use assembly 4 as a base. Why would you need assembly 4? I mean, MBDyn already takes care of the mechanism assembly. It will yield an error if the assembly was not consistent. My approach to animate the simulation results is just to use a timer (imported from Qt) to update each part'...
by josegegas
Tue Sep 10, 2019 2:53 am
Forum: FEM
Topic: FreeCAD as pre-post procesor for MBDyn
Replies: 95
Views: 7288

Re: FreeCAD as pre-post procesor for MBDyn

I have just started a work bench as a pre and post processor for MBDyn. Sounds great that you had the same idea! Would you mind sharing some details? My approach has been to create customized objects in FreeCAD that contain the properties of each object required by MBDyn. Thus, I create a "Gravity"...
by josegegas
Sun Sep 08, 2019 5:21 am
Forum: FEM
Topic: FreeCAD as pre-post procesor for MBDyn
Replies: 95
Views: 7288

FreeCAD as pre-post procesor for MBDyn

Hi all. For my PhD I've been using MBDyn to do simulations of engines and other mechanisms. It is a free and open source multi body dynamics software. It is very powerful but it lacks pre and post processing graphic interface. I've been using FreeCAD as pre and post processing tool for MBDyn and all...
by josegegas
Tue May 08, 2018 8:31 am
Forum: Open discussion
Topic: Detach sketch from a face
Replies: 1
Views: 319

Detach sketch from a face

Several times I have found myself creating a sketch attached to a face and then using: App.ActiveDocument.Sketch.Support=None to detach it from the face. The objective is simply to "remember" the position. The sketch is then used to create another part, not a pad or a pocket derived from the origina...
by josegegas
Thu Jun 15, 2017 10:45 am
Forum: Help on using FreeCAD
Topic: Creating GUI in macro
Replies: 4
Views: 1505

Re: Creating GUI in macro

Hi. This document helped me a lot. There is an example on how to create a gui with QtDesigner and then put it into FreeCAD. Is one of the last chapters...

https://www.gitbook.com/book/yorikvanha ... al/details

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