Learning Forum

[Tez123]

Hello,

I have Assembly of 6 components. But i want attach the point mass to the 6 th component to replace the the first five components.By Providing mass, center of Gravity and Moment of Inertia of First five components. How to find the Center of Gravity and Moment of Inertia of first five components.

[jj77]

Here is a way to do that in WB.

 

 

 

Example: Two spheres (equal mass) with their centre of gravity (COG) at 0 mm and 4000 mm respectively. Thus their combined COG is at 2000 mm.

 

 

 

In order to get that (2000 mm for COG), they are combined in to a multi-body part in DesignModeler or DM for short (In DM. select all parts, right click and choose form new part). Once we bring them in to mechanical, the information of the total assembly COG (and moment of inertia) is shown in the details of “Part”. See below (it is 2000 mm as it should be).

 

 

 

There might be of course other ways to get that info.

 

[bmarjaba]

Hello. I am having difficulty combining into multibody parts. You said right click on the parts in the selection tree then click on form new part. This option does not exist. I'm trying to find the center of gravity of my assembly.

[Erik Kostson]

 

Hi

This is a very old post so not very likely to reply.

The solution says: “they are combined in to a multi-body part in DM (select parts, right click and choose form new part).”

 

DM stands for design modeler.

As this is an old post and useful perhaps to others we will close it. Feel free to open a new one if needed.

Scripting might be another possibe solution (an example is here: https://discuss.ansys.com/discussion/2698/centre-of-gravity-mechanical-script) 

All the best

Erik

 

 

[Tez123]

Thanks a lot @ jj77

[jj77]

No worries. Stay tuned in though because there might be some other ideas coming up later today.

 

All the best

[Bimark9]

JJ77

what initial conditions do I have to input in Ansys explicit for it to run a rollover simulation of a bus as  specified in regulation ECE R66