I've been trying to compute the bending-torsion coupling constants for a wing, B(adsbygoogle = window.adsbygoogle || []).push({}); _{1}, B_{2}and B_{3}. The expression for this is

[itex]

\begin{bmatrix} B_1 \\ B_2 \\ B_3 \end{bmatrix} = \iint (y^2 + z^2)\begin{bmatrix} y^2 + z^2 \\ z \\ y \end{bmatrix}dydyz

[/itex]

where x is in along the wingspan direction, y is along chordwise direction and z is perp. to both.

Question is: how to evaluate this integral?

I have z as a series of points (airfoil shape), where at every y, there are two z values (upper and lower surfaces).

I'm not sure this is in the correct forum or not...

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# Evaluating double integrals for bending-torsion coupling constants

Can you offer guidance or do you also need help?

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