The new scenario of oil exploration in ultra deep water moves forward to 3000 m, has been putting for the companies that accept this technological challenger significant, border of the techno-scientific knowledge. Therefore, nowadays in this case of ultra deep waters, where the forces above the mooring lines are increase and the use of the new material in Petrobras Floating Production Units, it is necessary the good numerical analyses and experimental test by the mooring line. It appears the need to look for a solution for the problems according to the changes of the polyester rope in the production platform without the bottom extension change and its foundation (fixed point). According to this challenge it was necessary to develop a remote connection and disconnection device. This device is the KS hook and its optimization has been created using the fracture mechanical conception optics and computers tools (FEM and mooring software). There are two conditions to develop this device: one condition is functional and the other is structural. For the functional condition, it’s necessary to create the facilities for handling and installations. For the structural conditions, it is necessary to use the special wrought steel material, treatment for steel characteristic and right geometry. Finite Elements Modeling analyze used the Ansys software, considered the hardness profile material for Minimum Break Load (MBL). The lifetime design is about 25 years for this case and the fatigue analysis considered the residual stress and plasticity for structural device. Previous simulation is especially important in predicting behavior and in the development of new design products before testing. The model was meshed with 3D first order tetrahedral elements solid45. The mesh was sufficiently fine to ensure minimal loss of accuracy in curved geometry. There isn’t a TN fatigue curve (reference API Fatigue curves) for this KS Hook device geometry, in this case become necessary to use the model test to obtain this curve with the extrapolation of the results. The Finite Elements Modeling analyze used with the Material SN Fatigue curve will be used for this validation. Previous simulation is especially important in predicting behavior and in the development of new design products before testing.
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ASME 2007 26th International Conference on Offshore Mechanics and Arctic Engineering
June 10–15, 2007
San Diego, California, USA
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
0-7918-4270-3
PROCEEDINGS PAPER
TN X SN Fatigue Curves for KS Hook and Chain Using Finite Elements Modelling and Model Test Available to Purchase
Jose´ Carlos Lima de Almeida,
Jose´ Carlos Lima de Almeida
Petrobras, Rio de Janeiro, RJ, Brazil
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Ronaldo Rosa Rossi,
Ronaldo Rosa Rossi
Petrobras, Rio de Janeiro, RJ, Brazil
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Ricardo Sobral
Ricardo Sobral
Petrobras, Rio de Janeiro, RJ, Brazil
Search for other works by this author on:
Jose´ Carlos Lima de Almeida
Petrobras, Rio de Janeiro, RJ, Brazil
Ronaldo Rosa Rossi
Petrobras, Rio de Janeiro, RJ, Brazil
Ricardo Sobral
Petrobras, Rio de Janeiro, RJ, Brazil
Paper No:
OMAE2007-29051, pp. 11-19; 9 pages
Published Online:
May 20, 2009
Citation
de Almeida, JCL, Rossi, RR, & Sobral, R. "TN X SN Fatigue Curves for KS Hook and Chain Using Finite Elements Modelling and Model Test." Proceedings of the ASME 2007 26th International Conference on Offshore Mechanics and Arctic Engineering. Volume 4: Materials Technology; Ocean Engineering. San Diego, California, USA. June 10–15, 2007. pp. 11-19. ASME. https://doi.org/10.1115/OMAE2007-29051
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