Locating a node in 3D assembly under ANSYS Workbench 2

[Chaabain]

Dear ANSYS users,

Could anybody tell me how to locate a node in 3D model under ANSYS Workbench. I need that to know the soure of errors resulted from the flexible dynamic analysis on a 3D assembly.

Please, find enclosed the error file resulted from my analysis.

Thank you in advance,
Chaabain

 

[seymours2571]

I believe you might have to use ansys classic to locate a specific node within the mesh. To do so you can write out an input file from workbench that can be read by Ansys classic. You should be able to locate the node then.

Others may know of an easier method than this.

Good luck.

Stephen Seymour, PE
Seymour Engineering & Consulting Group

http://www.seymourecg.com

 

[Chaabain]

Thank you Seymours for your reply. The problem is that I don't have ANSYS Classic. I would be so grateful for any further suggestion.

 

[seymours2571]

Do you not have an Ansys Product Launcher icon in your start menu? You should be able to launch Ansys classic from the start menu.

Stephen Seymour, PE
Seymour Engineering & Consulting Group

http://www.seymourecg.com

 

[elogesh]

Hi,

I have gone through the file.err.

First you apply the constraints.The unconverged solution may be due to rigid body motion.

"No constraints have been defined using the D command" is the warning in your file.

Elogesh

 

[Chaabain]

Hi again,

Seymours, After writing the input file and reading it in ANSYS Classic, how I could locate the node? In other words, what the commands for that?

Elogesh, the stiffness behavior of all parts in my assembly is defined as flexible, what is the cause of this rigid body motion?

Thank you

 

[seymours2571]

I believe you should use the nsel command. The Ansys help reference should provide you the argument information as well as some examples.

Stephen Seymour, PE
Seymour Engineering & Consulting Group

http://www.seymourecg.com

 

[Chaabain]

Thank you Seymours, I'll look at this reference.

 

[elogesh]

Hi,

For arresting the rigid body motion. Right Click on the Analysis structural and add fixed support condition (Or any other suitable support condition as per the physical problem).

For locating node, Select solution. With solution selected, on the top left menu select Tools-> Write Ansys input file.

Then open the input file in notepad, search for the node as mentioned below...

Find-> N, node number

Specify the node number, then note down the X,Y and Z co-ordinates.

N,Node number,X,Y,Z

Then locate the x,Y and Z co-ordinates in the 3D CAD model.

Logesh

 

[Chaabain]

Dear Logesh,

First of all, I would like to thank you for your valuable response.
Concerning the rigid body motion, I'm doing a flexible dynamic analysis where all the bodies are defined with flexible behavior and connected through different joints. I'm obliged to constraint some degrees of freedom and free others (Otherwise the model will be over-constrained). Is there any other way to figure out this error?

For node location, it's ok. I'll try to do what you have recommanded.


Logesh, thank you a lot for your help.