HyperSizer Support Forum

Software Use => Analyzing & Optimizing Stiffened Panels => Topic started by: ksi8518 on November 09, 2012, 01:06:42 AM

Title: Optimizing Spar and Rib location as Assuming wing box as stiffened panel
Post by: ksi8518 on November 09, 2012, 01:06:42 AM
I'm trying to optimize number and location of spars and ribs.  It is painful to create numerous model and figure out which model is the best.

So I'm thinking, if I assume whole wing box as stiffened panel, let's say grid stiffened, then hypersizer could locate best rib position for me.  Is it gonna work?  I believe stiffened panel must be using plate equation, and 3-D wing box may not be suitable for this problem. If so, is there any simple way to optimizing inner structure location like spars and ribs?

Thanks.
Title: Re: Optimizing Spar and Rib location as Assuming wing box as stiffened panel
Post by: James on December 28, 2012, 02:00:41 PM
I don't think using a grid stiffened concept to optimize the 90 degree rib spacing is a good approach.

I think a better approach is to use the Non-FEA project capability to optimize the stiffened panel concept with varying X-spans. Using this approach you can develop weight trends vs. rib spacing.

A similar approach was used for the Ares V Interstage structure.
http://hypersizer.com/industry/projects/NASA-Ares-V-Interstage.php

For a more detailed explanation, see Section 2.1:
http://hypersizer.com/download.php?type=pdf&file=AIAA2010_Ares_V_Interstage_Composite_Panel_Concept_and_Ringframe_Spacing_Trade_Studies.pdf

-James