Adams & EDEM co-simulation

GertJan van Selm_21365

Hi,

I'm trying to run a co-simulation similar to This tutorial of Stephen Cole, however I've run into a problem.
In my Adams simulation, a weight is connected to a winch with a cable, and with rotating the winch, the weight is lowered:

In my EDEM simulation, I would like to connect the weight to a geometry, and lower this geometry onto the particle bed using the Adams Co-Simulation-Interface (ACSI). However, when I run the EDEM model using the ACSI, only rotation of the geometry takes place, and no translation:

It somehow seems that the local coordinate system of the weight in Adams, is connected with the global coordinate system of the simulation in EDEM. Do you know any way / directions to fix this?

Greetings, GertJan

 

EDIT: after some more thorough analysis, there is translation of the object, however still 2 problems are present:
- After the first timestep the Center of Mass of the geometry merges with the global Center of Mass
- Translation goes veeeeery slow, like few milimeters after 20 seconds

Stephen Cole

Hi GertJan,

 

I don't have a lot of experience of using Adams however it is always good to ensure the global coordinate systems of the geometries match, if they are offset this maybe creating this effect.

 

Just to note you could also consider the MotionSolve-EDEM coupling:

 

MotionSolve-EDEM tutorial

EDEM Tutorials

Regards

Stephen

 

 

Stephen Cole

Hi GertJan,

 

I don't have a lot of experience of using Adams however it is always good to ensure the global coordinate systems of the geometries match, if they are offset this maybe creating this effect.

 

Just to note you could also consider the MotionSolve-EDEM coupling:

 

MotionSolve-EDEM tutorial

EDEM Tutorials

Regards

Stephen

 

 

GertJan van Selm_21365

Stephen Cole_21117 said:

Hi GertJan,

 

I don't have a lot of experience of using Adams however it is always good to ensure the global coordinate systems of the geometries match, if they are offset this maybe creating this effect.

 

Just to note you could also consider the MotionSolve-EDEM coupling:

 

MotionSolve-EDEM tutorial

EDEM Tutorials

Regards

Stephen

 

 

Hi Stephen,

Fortunately both problems have already been solved. The main problem was that in both EDEM and Adams the distance unit was metres, whereas in the COSIM file it was assumed that the motion in EDEM was a 1000 times higher than Adams. This directly resulted in a translation of the geometries after the first timestep, and a very slow translation in the whole simulation.

 

Greetings, GertJan