2.7.3 Concentrated Stiffness

This is a specialized topic. Concentrated stiffness can be used to represent appendages attached to a thin walled section (TWS) when we do not want to model them in detail–we only want to account for their effect on the TWS. A typical example are stiffeners attached to airfoils when we want to simplify the modeling of the airfoil.

A concentrated stiffness is defined by its strength and by its mechanical properties (EA), (EI), (GJr), like this:

You need to study Chapter Beams of the textbook if you want to understand this topic.