Learning Forum

[esat38karakaya]

Hi,

I'm applying two remote forces to the same surface. Normally, I could apply them within a single load, but because my force expression is in the form of (sin(time)), ANSYS doesn't allow me to enter forces in multiple directions within the same force. So, I'm forced to apply two remote forces, but this time I get an MPC error.

"Two or more moments or remote forces are referencing the same remote point. This will very likely cause duplicate specifications to be ignored. Please only specify one remote force or moment per remote point."

Is there a way to solve this?

[Gary_S]

 

Apply a Remote Point to the single face.
Then, Apply the Load1 and Load2 scoped to the Remote Point. 

 

[esat38karakaya]

Thanks, but i tried it yesterday and still get same warning. 

[Gary_S]

OK. Can you use two regular Forces (not Remote Force)? 

[esat38karakaya]

I can't because I use remote force because the force must affect the surface I mentioned from 1 meter away. Therefore, it would not be correct to apply direct force.

[Gary_S]

OK. Maybe use a single Remote Force but use say Tabular Data for X and Tabular Data for Y?

[esat38karakaya]

I tried it also but it didn't work. When I retrieved tabular data from a 300-line XML file, only the first 10 were read by ANSYS.

[Gary_S]

OK. 

I used a copy/paste 200 lines from Excel. Paste into the botttom cell and it will expand the table to fit the values. 
The input ds.dat shows all 200 entries. 

[esat38karakaya]

Thanks, this actually worked. However, the stress results were the same. I got a result that was about 3% different from the analysis I received the MPC warning for. I don't know if it was specific to my project or if there was something else going on. Also, sorry for the late reply.

[Gary_S]

Any boundary condition that makes use of Constaint Equations / Multipoint Constraint Equations (CE/MPC) will cause overconstraint when layed on top of each other, or along a shared line. 
There is no easy way around. It should be OK for small deformation analysis. 

Beyond that the only other suggestion might be to split up the target face and apply as separate loads. 

Glad to help!