| Full text | |
| Author(s): |
Nobrega de Freitas, Artur Siqueira
[1]
;
Alvarez, Alexander Alfonso
[2]
;
Ramos Jr, Roberto
;
de Barros, Ettore Apolonio
[1]
Total Authors: 4
|
| Affiliation: | [1] Univ Sao Paulo, Dept Mechatron & Mech Syst, Ave Prof Mello Moraes 2231, BR-05508030 Sao Paulo, SP - Brazil
[2] Univ La Serena, Fac Ingn, Dept Ingn Mecan, Av Benavente 980, La Serena 1720170 - Chile
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | JOURNAL OF MARINE SCIENCE AND ENGINEERING; v. 8, n. 7 JUL 2020. |
| Web of Science Citations: | 1 |
| Abstract | |
The structure of an autonomous underwater vehicle (AUV), usually composed of a cylindrical shell, may be exposed to high hydrostatic pressures where buckling collapse occurs before yield stress failure. In conventional submarines, welded stiffeners increase the buckling resistance, however, in small AUVs, they reduce the inner space and cause residual stresses. This work presents an innovative concept for the structural design of an AUV, proposing the use of sliding stiffeners that are part of the structure used to accommodate the electronics inside it. Since the sliding stiffeners are not welded to the shell, there are no residual stresses due to welding, the AUV fabrication process is simplified, enabling a reduction of the manufacturing cost, and the inner space is available to accommodate the equipment needed for the AUV mission. Moreover, they provide a higher buckling resistance when compared to that of an unstiffened cylindrical shell. A comparative analysis of the critical buckling loads for different shell designs was carried out considering the following: (i) the unstiffened shell, (ii) the shell with ring stiffeners, and (iii) the shell with sliding stiffeners. Results evidenced that major advantages were obtained by using the latter alternative against buckling. (AU) | |
| FAPESP's process: | 18/14024-2 - Adaptive sensor fusion applied to AUV navigation |
| Grantee: | Ettore Apolonio de Barros |
| Support Opportunities: | Regular Research Grants |