5. C modeling

5.1. Characteristics of modeling

	Modeling TUYAU (SEG4) Breakdown for numerical integration Number of layers: 7 Number of layers: 7 Number of sectors: 7 Number of sectors: 18 Boundary conditions: Point \(A\): degree of freedom of Beam: \(\mathrm{DX}=\mathrm{DY}=\mathrm{DZ}=\mathrm{DRX}=\mathrm{DRY}=\mathrm{DRZ}=0\) degree of freedom of Hull: degree of freedom of Shell: \(\mathrm{Ulm}=\mathrm{Vlm}=\mathrm{Wlm}=0(m=\mathrm{2,6})\) \(\mathrm{UOm}=\mathrm{VOm}=\mathrm{WOm}=0(m=\mathrm{2,6})\) \(\mathrm{Wl1}=\mathrm{WO1}=\mathrm{WO}=0\) Point \(D\): Coque’s degree of freedom: \(\mathrm{Ulm}=\mathrm{Vlm}=\mathrm{Wlm}=0(m=\mathrm{2,6})\) \(\mathrm{UOm}=\mathrm{VOm}=\mathrm{WOm}=0(m=\mathrm{2,6})\) \(\mathrm{Wl1}=\mathrm{WO1}=\mathrm{WO}=0\)

5.2. Characteristics of the mesh

Number of knots: 67

Number of meshes and type: 22 SEG4

5.3. Tested sizes and results

\(\mathrm{DRZ}\)	Identification	Instants	Instants	Reference	Aster	\(\text{\%}\) difference
0.32	ETA_PILOTAGE	18	18	1.0	1.1681	16.81
0.34	ETA_PILOTAGE	18.5	18.5	1.0	1.1678	16.78
0.36	ETA_PILOTAGE	19	19	1.0	1.1758	17.58
0.38	ETA_PILOTAGE	19.5	19.5	1.0	1.1834	18.34
0.40	ETA_PILOTAGE	20	20	1.0	1.1905	19.05

5.4. notes

During step A, the internal pressure and the force due to the background effect are progressively imposed on the time interval \(0<t<10\). Then (step B), the bending moment is gradually imposed on the time interval \(10<t<20\). To solve, during step B, an increase in rotation \(\mathit{DRZ}\) by \(0.4\mathit{rad}\) is imposed on the solution obtained during step A.