| Full text | |
| Author(s): |
Total Authors: 2
|
| Affiliation: | [1] Univ Sao Paulo, Dept Struct & Geotech Engn, Sao Paulo - Brazil
[2] Univ Sao Paulo, Dept Mech Engn, Sao Paulo - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | MARINE STRUCTURES; v. 34, p. 16-40, DEC 2013. |
| Web of Science Citations: | 14 |
| Abstract | |
Catenary risers can present during installation a very low tension close to seabed, which combined with torsion moment can lead to a structural instability, resulting in a loop. This is undesirable once it is possible that the loop turns into a kink, creating damage. This work presents a numerical methodology to analyze the conditions of loop formation in catenary risers. Stability criteria were applied to finite element models, including geometric non-linearities and contact constraint due to riser-seabed interaction. The classical Greenhill's formula was used to predict the phenomenon and parametric analysis shows a ``universal plot{''} able to predict instability in catenaries using a simple equation that can be applied for typical risers installation conditions and, generically, for catenary lines under torsion. (C) 2013 Elsevier Ltd. All rights reserved. (AU) | |
| FAPESP's process: | 12/09912-0 - RISERS NONLINEAR DYNAMICS INCLUDING THE UNILATERAL CONTACT WITH THE SEABED |
| Grantee: | Alfredo Gay Neto |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 06/06277-0 - Linear and nonlinear dynamic analysis of submerged cables |
| Grantee: | Alfredo Gay Neto |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |
| FAPESP's process: | 12/21167-8 - Techniques for the computational analysis of contact problems in risers |
| Grantee: | Alfredo Gay Neto |
| Support Opportunities: | Scholarships abroad - Research Internship - Post-doctor |