Applying force in ANSYS Workbench Help 2

[Chaabain]

I have a 3D model imported to ANSYS Workbench. I would like to apply a force in a determined point of my model. How could I apply the force in a point whose x,y and z are known.

Thank you in advance.
Chaabain

 

[pitizone]

Hi Chaabain,

I'm not sure but I think that it's possible to apply a force on just a face or an edge.

jérôme

 

[Chaabain]

Hi Jérôme,

Thank you for your participation. That's the problem. I just need to apply the force in a defined point and don't know how to do it.

 

[jiligeo]

Hi, I am not sure, but I think using apdl you can do that in workbench too. By defining the keypoint, and applying force on keypoint.

 

[cbrn]

Hi,
Jiligeo, the answer is NO, unfortunately. If you add a keypoint, it will be "unlinked" from the FE-discretized model.
The easiest way is to modify your solid model in the CAD so that it has this point as a "hard point" (i.e. a line division or an intersection of faces).
If you really want to "cheat" with Workbench, you must write in APDL all the meshing+loading+solving process. However, I don't know how the post-processing will behave... And moreover, under these conditions the best thing is to shift to Ansys Classical!

Regards

 

[Pawel27]

You can do it! If you have Design Modeler you can use
"Create\point" from upper menu. In "Details view"
set "typeoint load". Moreover you can move this point using other parameters in "Details view". When you move whole geometry model to "Simulation" this point will be "hard point" and mesh will be fitted to this point (sometimes mesher cannot mesh geometry taking into account this point). Next just apply force and pick this point.

 

[cbrn]

Of course. Design Modeler does is a "CAD", and behaves bi-directionally with Simulation.
Trouble is it requires a separate additional license, but that's another problem...

 

[JBorg]

Chaabain,

One method that I use is to create splits (in Solidworks) that cross at that point. Then you have a point you may select in Workbench.

Another method is to create a command snippet that selects the node at that location and applied the load. Since you may not necessarily have a node at that location, you may need to open the tolerance slightly. For example, to select a node at (5,5,5) add in a command snippet

nsel,,loc,x,4.5,5.5
nsel,r,loc,y,4.5,5.5
nsel,r,loc,z,4.5,5.5
nlist
f,all,fx,100

The issue with this is that it can potentially select zero nodes or more than one node. The NLIST command will print what nodes are selected so you can check, but this method is obviously imperfect.

John

 

[cbrn]

Hi,
but you can refine the method: iterate the selection by varying the selection tolerance, until the number of selected nodes is one; just use *DO ... *ENDDO, and *GET,... functions.

Regards