In this video I compare the workflow approach of ANSYS Motion versus my FreeCAD + MBDyn workbench, in order to simulate a double wishbone car suspension.
Basically any computer in which you can run FreeCAD and MBDyn (www.mbdyn.org/). It also needs Simpy (simpy.readthedocs.io/en/latest/) and Mpmath (mpmath.org/), but these are very light. There is an old version available from here: www.mbdyn.org/?Software_Download___MBDyn_and_FreeCAD You will find installation instructions for Windows and Linux, tutorials and a bunch of running examples. This version is almost a year old now, I will be releasing a new version soon, which fixes many bugs and adds new features, although the workflow is the same...
I have to say that I am really impressed by the performances provided by this workbench: the speed of the animations achieved with the examples provided by the author is incredible compared to other Freecad workbenches specifically developed to handle assemblies. Despite the fact I am using a N4120 Gemini Lake processor with integrated Intel graphic, the animation is really smooth... WOW! How is it possible?
@@roccovicedomini8535 Thanks. In fact it is not very complicated. The trick is not to simulate in real time... My workbench follows the next steps: 1.- MBDyn solves the assembly. 2.- MBDyn solves the kinematics and the dynamics of the model. 3.- The results of the MBDyn simulation are temporarily loaded into the RAM. 4.- These results are used to animate the model. If you are interested in the details, you can have a look at the "animation.py" class...
Each part has a material card within it, which will open the FreeCAD material editor. You can then assign an existing material for each part, or create a new material and insert the physical properties. The workbench will then calculate the mass and moments of inertia according to the density, volume and mass distribution of the CAD part. By default each rigid body is created with the average density of steel.
@@charlesblack7989 Please have in mind that this is still under development. The version in Gitlab is just a proof of concept. You may want to try the tutorials and have a look at the examples I have provided before setting up your own simulations. A much better new version is cooking-up...
This is very cool, very inspiring, thanks and happy new year!
Amazing workbench!!. Thanks.
Great job
we are not able to install the MBDyn workbench. Please share proper instructions
Very impressive!
Your workbench in freedcad, what spec computer would work (nvidia quadro, win10, 16gb etc?)
& is your workbench available?
Basically any computer in which you can run FreeCAD and MBDyn (www.mbdyn.org/). It also needs Simpy (simpy.readthedocs.io/en/latest/) and Mpmath (mpmath.org/), but these are very light. There is an old version available from here: www.mbdyn.org/?Software_Download___MBDyn_and_FreeCAD You will find installation instructions for Windows and Linux, tutorials and a bunch of running examples. This version is almost a year old now, I will be releasing a new version soon, which fixes many bugs and adds new features, although the workflow is the same...
@@josegegas thank you, I will give this a try.
I have to say that I am really impressed by the performances provided by this workbench: the speed of the animations achieved with the examples provided by the author is incredible compared to other Freecad workbenches specifically developed to handle assemblies. Despite the fact I am using a N4120 Gemini Lake processor with integrated Intel graphic, the animation is really smooth... WOW! How is it possible?
@@roccovicedomini8535 Thanks. In fact it is not very complicated. The trick is not to simulate in real time... My workbench follows the next steps: 1.- MBDyn solves the assembly. 2.- MBDyn solves the kinematics and the dynamics of the model. 3.- The results of the MBDyn simulation are temporarily loaded into the RAM. 4.- These results are used to animate the model. If you are interested in the details, you can have a look at the "animation.py" class...
I haven't had time to give it a try at the moment, so it is possible to add different masses to the parts? Thanks in advance.
Each part has a material card within it, which will open the FreeCAD material editor. You can then assign an existing material for each part, or create a new material and insert the physical properties. The workbench will then calculate the mass and moments of inertia according to the density, volume and mass distribution of the CAD part. By default each rigid body is created with the average density of steel.
@@josegegas Great! Thank you very much for your reply and this amazing workbench. I'll give it a try asap.
@@charlesblack7989 Please have in mind that this is still under development. The version in Gitlab is just a proof of concept. You may want to try the tutorials and have a look at the examples I have provided before setting up your own simulations. A much better new version is cooking-up...