FEA on an Aircraft Wing

FEA on an Aircraft Wing:

A uniform tubular spar approximates the structural dynamic model of a wing. The vertical bending of the spar is of interest in this problem.

Wing assumed properties: 

• Young's Modulus E = 69 GPa 
• Area = 0.06 m2 , Radius = 138.2 mm
• Length = 15m
• Density (Aluminum) = 2700 kg/m3

A 3D design of the tubular structure: 

A tetrahedron mesh is applied, using a mesh size of 50mm and an absolute sag of 15mm:

Mesh of the Tubular Spar

Material properties applied accordingly:

Initial analysis is done based on a static step, using a load of 5000N:

Now, a frequency response analysis is conducted to find the natural frequencies at different modes (30 modes):