7. E modeling#
7.1. Characteristics of modeling#
Ditto modeling D
Modeling with TUYAU_6M elements (SEG3, 6 Fourier modes).
Curved elements are modeled by TUYAU_6M elements (5 elements per elbow).
The straight elements are modeled by TUYAU_6M elements (18 elements in total for the three straight beams: 4 elements for N3N4 and NSN6, 5 elements for the two right parts of N1N2).
7.2. Characteristics of the mesh#
Number of knots: |
57 |
Number of meshes and types: |
28 TUYAU_6M |
7.3. notes#
The modes are calculated using method TRI_DIAG: the 9 smallest modes.
7.4. Tested sizes and results#
Structure frequencies (full mass matrix).
Natural Frequencies |
Reference |
Fashion 1 |
10.39 |
2 |
20.02 |
3 |
25.45 |
4 |
48.32 |
5 |
52.60 |
6 |
84.81 |
7 |
87.16 |
8 |
129.31 |
9 |
131.69 |