Learning Forum

[Stuart Smyth]

Is it possible to export the particle forces on boundaries back into ansys motion. So the example I wish to try is:

• Using Ansys motion to generate complex crushing motion - Done
• Use rocky to determine peak crushing forces etc - Done
• Export these forces back out of rocky into motion and study foundation loads etc - Unsure how to achieve

[Rob]

The coupling is fairly new, and is fully explained in Tutorial 19, Backhoe Loader. What I can't tell is whether the Rocky tutorials are in the Help system or on the Ansys Learning Hub (subscription requried) as I'm automatically logged into the sites. 

[Stuart Smyth]

Hi Rob

I have used the Backhoe loader tutorial to export the FMU from motion into rocky to generate the complex motion frames - but there is nothing in that tutorial about taking the forces from rocky and bringing them back into Ansys Motion.

[Marcelo Precoppe]

Hello Stuart,

It appears that Ansys Motion, whether used as a standalone application or integrated into Ansys Mechanical, does not support importing loads. The workaround, however, is to use Ansys Transient Structural, as it allows for importing loads. You can find detailed instructions on how in Workshop 15.

[Marcelo Precoppe]

If the part you wish to analyze does not come into direct contact with the particles, you can follow these steps:

1. In Ansys Motion, designate the part you want to analyze as a flexible body and mesh it.
2. Generate the Functional Mock-up Unit (FMU). Note that there might be some warnings regarding limited support for flexible bodies.
3. Import the FMU into Rocky. Once imported, the flexible body will not be visible in the simulation.
4. Run the simulation in Rocky, keeping in mind that it will take significantly more time to complete.
5. Launch Ansys Motion Postprocessing and open the DFR file located inside the Rocky project folder