Radii of gyration

Does anyone know what the proper term is to be used to enter the radii of
gyration in a relation in Wildfire? It is calculated in the mass properties
but there does not seem to be a parameter listed that can be used.
Thanks
Doug

 

Look under

Model Mass Properties --> Compute

Then scroll down through the listed properties
Radii of gyration (wrt PrincipalAxis) is displayed

Cheers

Sq.

 

Thanks for reply,
I realize that radii of gyration are calculated. I am trying to use them
automatically in a relation. The only way I have found so far is to do an
intermediate step to calculate the radius of gyration from the area moment
and mass. I was just trying to eliminate this step.
Doug

 

: Thanks for reply,
: I realize that radii of gyration are calculated. I am trying to use them
: automatically in a relation. The only way I have found so far is to do an
: intermediate step to calculate the radius of gyration from the area moment
: and mass. I was just trying to eliminate this step.
: Doug
:
This limitation was realized a while ago, so they came up with an analysis feature
('Insert>Model Datum>Analysis'). It gives you several types of analysis you can
do, including surface, curve, measure and model. You need to create an analysis
feature from a model analysis, so under type, click by Model Analysis. At the
bottom, click the Next box which takes you to the familiar model analysis
interface. Click Compute to get the breakdown on volume, mass, surface area, etc.
Then click Close to get back to the analysis feature interface. In the Result
params window, most of possible parameters are marked as NO, don't create this
parameter. Check down the list to find the ones you need created for your
relation, and in the Create window, mark that parameter YES. Take note of the
names for these parameters, as they are local to the analysis feature and do not
appear in the general 'Tools>Relations' interface. These analysis created
parameters can, however, be used in relations. Unfortunately, the radii of
gyration in relation to principal axes are not created as parameters. However,
from the rest of the information and parameters provided, I'm sure you'll have no
trouble setting up a relation to calculate it.

David Janes