Hi,

Just wondering how you guys go about estimating of stiffeners.

Say I've got a circular plate restrained at the edge with a uniform
pressure applied over the whole plate.

I've solved the nice equation in Roarks and the plate is thick and therefore heavy because I'm interested in keeping the deflection down.

So instead I want to go for a lighter design by using geometry, ie thinner plate with back stiffners, say in a star pattern. How do you estimate the deflection and stress?

Previously I've taken the approach of making up imaginery T beams and applying all the load through these with the top flange of the T beam being part of the circular plate (I usually make this flange 2*width of the stiffner) This normally brackets the results, between a beam and a flat plate.

I've been thinking there must be a better solution without having to go to FEA to get "the answer"

Anyways, please tell me your thoughts and methods.

Kind Regards, Tony Mulholland

Just wondering how you guys go about estimating of stiffeners.

Say I've got a circular plate restrained at the edge with a uniform

I've solved the nice equation in Roarks and the plate is thick and therefore heavy because I'm interested in keeping the deflection down.

So instead I want to go for a lighter design by using geometry, ie thinner plate with back stiffners, say in a star pattern. How do you estimate the deflection and stress?

Previously I've taken the approach of making up imaginery T beams and applying all the load through these with the top flange of the T beam being part of the circular plate (I usually make this flange 2*width of the stiffner) This normally brackets the results, between a beam and a flat plate.

I've been thinking there must be a better solution without having to go to FEA to get "the answer"

Anyways, please tell me your thoughts and methods.

Kind Regards, Tony Mulholland