Learning Forum

[Autonewbie]

Hi
I want to know how to list down constraint equations in Workbench Mechanical?

Thanks

[peteroznewman]

I'm not sure what you mean by "list down".

What I find very helpful is to see the Constraint Equations graphically displayed as red lines on the geometry. This is especially helpful when using Joints, Remote Points/Forces/Displacements or Bonded Contacts of type MPC.

When the solution is complete, click on the Solution Information folder in the outline. The Graphics window will flip to the Worksheet tab where you can see the Solution Output, but click on the Graphics tab and you will see the geometry with all the Constraint Equations shown graphically.

[Autonewbie]

Hi Peter,

I wonder if I can see the coefficient value of the CE apart from graphically display. I want to check whether it is CERIG or RBE3. 

[peteroznewman]

You can click the Write Input File... button on the Solution tab then go in there to find CERIG in this example.

[usama]

dear Peter,

hope you are fine can you please comment on my post I need your suggestions regarding incomplete filling.

sorry, I am adding a post here for your attention to my post.

regards

Usama 

[Autonewbie]

Hi Peter,

When I read the solver file and it seems CE equation has been written out but I could not find it.

 

[peteroznewman]

I saw that too and I couldn't find that file either.

There is an APDL command CELIST, but I couldn't make that work in Workbench and I don't use APDL.

[Autonewbie]

Hi Peter,

If I want to show that using Rigid Body is based on CERIG Constraint Equations, do you know how do I do on Workbench?

Besides, I want to show that using Point Mass with Deformable Behavior and Rigid Behavior is also referring to using RBE3 and CERIG CE equations. 

The reason that I want to list down CE equation is I can show the equation coefficient value for others to understand its application and behavior. 

[peteroznewman]

In Workbench, you can write out the input file as I showed above.  That may be sufficient to prove CERIG vs RBE3 for rigid vs deformable remote point mass.

I don't know how to get the equation coefficients in Workbench.

Try using APDL to open your model or input file, solve it there and use the CELIST command inside APDL. This is available by menu selection according to ANSYS Help, which doesn't say what the output is exactly.

[Autonewbie]

I actually have tried to import it to APDL but unfortunately no CE is available until I saw the CE graphic display on Workbench.

 

 

[peteroznewman]

Where did the image in this post come from?

[Autonewbie]

I manually created CE in APDL to list down CE equation as I could not get it in Workbench although I know CE is generated in Point Mass/ Rigid Body.

[Autonewbie]

Hi Peter,

I could not find any PM function. Hence, I wish you a Happy New Year 2020 and thank you for addressing my questions and your contribution to the forum!