Recon1775
Aerospace
- Jul 24, 2002
- 137
Has anyone noticed a issue in either Creo 2 and 3 (or later versions) that has the product of inertia showing the wrong direction (positive or negative)?
I've found recently that Creo 2 and 3 are reporting the incorrect sign or value (depending on the placement of mass) for the product of inertia and I wanted to confirm if anyone else has seen the same thing.
I created a simple block in exactly the same position, size, orientation, and density in Creo, NX, and Solidworks and ran the mass properties. Creo is the only one reporting the Product of Inertia with negative signs.
Please see linked below, PNG image file for those results.
I only have access to Creo 2 and 3, so I'm wondering if the same result is seen in Creo 4 and 5?
From my understanding if all the mass is located in the positive X,Y,Z quadrant with a right hand coordinate system, the Product of Inertia should be positive. So that means Creo, at least in 2 and 3, the coordinate system is backwards when outputting the Product of Inertia. For Moment of Inertia there wouldn't be a noticeable difference based on axis +/- direction since the value is always positive. With anyone using later versions of Creo are you also seeing this result?
Thanks!
I've found recently that Creo 2 and 3 are reporting the incorrect sign or value (depending on the placement of mass) for the product of inertia and I wanted to confirm if anyone else has seen the same thing.
I created a simple block in exactly the same position, size, orientation, and density in Creo, NX, and Solidworks and ran the mass properties. Creo is the only one reporting the Product of Inertia with negative signs.
Please see linked below, PNG image file for those results.
I only have access to Creo 2 and 3, so I'm wondering if the same result is seen in Creo 4 and 5?
From my understanding if all the mass is located in the positive X,Y,Z quadrant with a right hand coordinate system, the Product of Inertia should be positive. So that means Creo, at least in 2 and 3, the coordinate system is backwards when outputting the Product of Inertia. For Moment of Inertia there wouldn't be a noticeable difference based on axis +/- direction since the value is always positive. With anyone using later versions of Creo are you also seeing this result?
Thanks!