CG of a Skin in CATIA V4

[engin]

Hello,

I am trying to analyze a skin in V4 and none of the tools (ANALYSIS-inertia, SKIN-ANALYSIS, SOLID-ANALYSIS, etc.) seem to be able calculate Center of Gravity.
Can anyone help me with this?

Thank you,

Engin.

 

[tbuelna]

engin,

A skin has no thickness and thus no C of G. Create a solid by offsetting the skin by a small amount, and then analyse the resulting solid.

Terry

 

[solid7]

That's all true, but in V5, you CAN find the CG of a surface, by using the inertia tool. This makes perfect sense, because giving the surface a thickness will only offset the point. (it remains constant in whatever plane you defined the surface in - so long as you don't change anything else)

You're probably correct about V4. I don't remember - but I did want to express the need to use caution in your logic. (however true it may be in conventional terms)




**************
Check out CATBlog!

 

[engin]

Guys, thank you,
There is one thing - a face does not have thickness as well, nevertheless you can find its CG using Analysis Inertia.
There should be a way for skins...

Thank you again,

Engin

 

[solid7]

Skins are nothing more than a placeholder for faces. Really, it's just sort of a redundant entity, albeit logically necessary for V4.

That being said, have you tried using the analysis "combine" feature with the faces? It's been a very long time since I've used V4 for any advanced tasks, but I clearly remember that it was possible with solids to analyze multiple objects, and combine the result, and the resultant would be a centroid, CG, or moment of inertia for all analyzed objects.

Forgive me for being vague. I have V4, but my workstation is offline at the moment. Perhaps someone else can chip, in and either shoot me down, or back me up?




**************
Check out CATBlog!