Software Use > Analyzing & Optimizing Stiffened Panels

Adding mass to a stiffened panel

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eric:
I'm looking to determine isogrid dimensions from a frequency requirement using a Non-FEA project.  I need to account for the mass of a component that attaches to the panel when determining the frequency.  I tried to use "Added Weight", but there is no effect on the component structure when an analysis is completed with a non-trivial amount of additional mass.  Any insight?

Thanks!
Eric

James:
The "Added Weight" does not feed into the panel frequency analysis. It probably should.

You can use the Bond Weight (units = lb/ft^2) on the Project Sizing Form > Options Tab > Constants which will increase the mass that is used in the panel frequency analysis.

-James

eric:
Adding it as bond weight (any or all of three options) doesn't seem to impact the results either.

James:
The local frequency will be unaffected but the panel frequency should account for the added bond weight. What panel concept is this?

eric:
This is an isogrid concept.  I'm only looking at panel frequencies.

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