I wish to calculate the moment of inertia (beam calcs). The units are mm^4.
Of course in the drop down to add a parameter there are no units for mm^4.
Furthermore the only area units are acre or circular mil. (not much use especially in a metric set up)
So there must be a work around or something to make this work. do I have to divide by mm^3 or what.
Also since I am working in the sheet metal environment. The width and depth are contained in the sheet metal rules. As I change the width and depth can I pull the values from the rule. Maybe I should just get the length from the sheet metal, and pull the width from the solid ???
Oh and while we are at it... I have used a pipe to calculate the length of my spring it comes to 148.767mm
I have also used sheet metal to calculate the length of my spring it comes to 148.178. This might use some bending rules to calculate the length, I would have though you would need a slightly longer piece to start bending the form no a shorter piece?
Hi,
If you scroll through the units in the parameter list, you will see that there is neither “Moment of Inertia” nor any form of mm^xx.
günther
Yes true, so you mean to say I can't do it parametrically???
I seemed to have lucked into calculating the moment of inertia correctly. by selecting unitless. Not sure why but there it is???
See attached file modify>change parameters>MInertia
K so I can do what I want but this seems really really stupid for a design program in 2024.
I create a user parameter with no units.
I then enter a formula which uses Model parameters (result would be in mm4); i divide by the correct units(mm4) to make it dimensionless.
I create a user parameter with no units.
I then enter a another formula which uses model parameters (result would in mm3); i divide by the correct units (mm3) to make it dimensionless.
I create a user parameter with the units I want (mm); i enter the unitless parameter; I multiply by the unit I want (mm).
Bingo I have what I want.
Please tell me there is an easier way????
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