4. B modeling#
4.1. Characteristics of B modeling#
We model (3D modeling), only a fin on which cyclic symmetry conditions of double diameter are applied.
NB: we could have chosen another number of modal diameters (0, 1, 3,…)
Number of nodes |
\(600\) |
|||
Number of meshes |
\(777\) |
That is: |
||
QUAD4 |
|
|||
HEXA8 |
|
Figure 4.1. Wing mesh for B modeling
4.2. Tested sizes and results#
Grandeur |
Fashion no. |
Reference \((\mathrm{Hz})\) |
Tolerance \((\text{\%})\) |
FREQ |
\(1\) |
\(33.4833\) |
\(0.10\) |
\(2\) |
\(33.4833\) |
\(0.10\) |
|
\(3\) |
\(44.8997\) |
\(0.10\) |
|
\(4\) |
\(44.8997\) |
\(0.10\) |
|
\(5\) |
\(80.2363\) |
\(0.10\) |
Fashion \(1:33.4833\mathrm{Hz}\)
Fashion \(2:33.4833\mathrm{Hz}\)
Fashion \(3:44.8997\mathrm{Hz}\)
Fashion \(4:44.8997\mathrm{Hz}\)
Fashion \(5:80.2363\mathrm{Hz}\)
Figure 4.2 The modal deformations of the first 5 natural modes of diameter 2