Discussion Groups

## Robot Structural Analysis

Distinguished Contributor
Posts: 128
Registered: ‎11-16-2011

# Sectorial moment of inertia

1717 Views, 6 Replies
05-18-2012 03:53 AM

Hi guys!

Is it possible in robot to calculate section sectorial moment of inertia in section defenition module? I didnt find it, probably was looking in wrong place or its not possible?

Product Support
Posts: 4,828
Registered: ‎12-17-2010

# Re: Sectorial moment of inertia

05-18-2012 04:01 AM in reply to: Jummybear

Yes, providing you define a section as a thin walled one.

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Artur Kosakowski
Distinguished Contributor
Posts: 128
Registered: ‎11-16-2011

# Re: Sectorial moment of inertia

05-18-2012 04:17 AM in reply to: Artur.Kosakowski

Ok, but if i want to get sectorial moment of inertia of some section from database? I cant define it like thin walled section... Or i should redraw section by hand te get that moment? Looks like not very logical way

Product Support
Posts: 5,162
Registered: ‎04-26-2010

# Re: Sectorial moment of inertia

05-18-2012 04:36 AM in reply to: Jummybear

Why illogical? Robot does not use iomega for some families so there is no such data for them.

Rafal Gaweda
Distinguished Contributor
Posts: 128
Registered: ‎11-16-2011

# Re: Sectorial moment of inertia

05-18-2012 04:59 AM in reply to: Rafal.Gaweda

Really? And what about laterial buckling controll? It and Iw showld be taken into cansideration

Product Support
Posts: 5,162
Registered: ‎04-26-2010

# Re: Sectorial moment of inertia

05-18-2012 05:14 AM in reply to: Jummybear

Example, for IPE

Rafal Gaweda
Product Support
Posts: 4,828
Registered: ‎12-17-2010

# Re: Sectorial moment of inertia

05-18-2012 05:44 AM in reply to: Jummybear

For steel design module this value is generally calculated according to the provisions (formulas) from the code itself (the selection of the formula to be used is governed by a section symbol assigned to a particular section). Mind that LTB is checked only for selected section types (again this is governed by section symbol). The value from the database is used only when the steel design code itself doesn't provide the necessary formulas.

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.

Artur Kosakowski