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Keywords: stiffness
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Proceedings Papers

Paper presented at the Offshore Technology Conference Brasil, October 24–26, 2023
Paper Number: OTC-32918-MS
... are simulated to investigate the stiffness level required to suppress fishtailing instability. The first MRE Tensioner corresponds to the 0A energizing current, which corresponds to the lowest MRE Tensioner stiffness. The second MRE Tensioner corresponds to the current level to get the appropriate MRE Tensioner...
Proceedings Papers

Paper presented at the Offshore Technology Conference Brasil, October 24–26, 2023
Paper Number: OTC-32831-MS
... artificial intelligence coefficient upstream oil & gas electrical industrial apparatus prototype vehicle thruster tank surge sensor amplitude oscillation sway stiffness identification free oscillation engineering heave equation Introduction Unmanned underwater vehicles play...
Proceedings Papers

Paper presented at the Offshore Technology Conference Brasil, October 29–31, 2019
Paper Number: OTC-29813-MS
... to assess their possible impact on global riser behavior and local impact (i.e. at well head). Depending on the nonlinearities to be considered, the local impact of the model is clearly demonstrated. vandiver amplitude prediction stiffness nonlinearity default parameter riser solver excitation...
Proceedings Papers

Paper presented at the Offshore Technology Conference Brasil, October 29–31, 2019
Paper Number: OTC-29678-MS
.... The top first weld is a crucial hotspot, in particular for production SLWRs ( Senra et al. 2011 ). These typically adopt flexible joints (FJ) at the connection to the vessel/platform, and linearization of the FJ stiffness is one of these key simplifications that bring significant value in reducing...
Proceedings Papers

Paper presented at the OTC Brasil, October 24–26, 2017
Paper Number: OTC-27967-MS
... for the installation of large subsea equipments. petrobras polyester rope compensation system load transfer manifold pennant subsea production equipment upstream oil & gas offshore pipeline stiffness dimension subsea system structural geology installation aht cable water depth subsea...
Proceedings Papers

Paper presented at the OTC Brasil, October 27–29, 2015
Paper Number: OTC-26229-MS
... cellular tendon design subsea system wall thickness installation conventional tendon tendon design cellular tendon tendon section area tlp hybrid cellular tendon ultra-deep water stiffness pipe string end fixture requirement OTC-24305-MS Cellular Tendon - Enabling Technology...
Proceedings Papers

Paper presented at the OTC Brasil, October 27–29, 2015
Paper Number: OTC-26267-MS
... or configuration, it is critical to ensure that no damage will occur in any one of the riser sections. The key to avoiding damage is to correctly evaluate the clashing energy, which is a function of the relative speed between the risers at the moment when clashing occurs, as well as the clashing stiffness...
Proceedings Papers

Paper presented at the OTC Brasil, October 29–31, 2013
Paper Number: OTC-24305-MS
... system stiffness installation OTC 24305 Cellular Tendon - Enabling Technology for Ultra-Deep Water TLPs Jim Yu, INTECSEA, WorleyParsons Group Copyright 2013, Offshore Technology Conference This paper was prepared for presentation at the Offshore Technology Conference Brasil held in Rio de Janeiro...
Proceedings Papers

Paper presented at the OTC Brasil, October 29–31, 2013
Paper Number: OTC-24466-MS
..." paired pontoon plates also increase the stiffness of the lower h ull. Model tests for the adapted HVS class of semisubmersible were performed to investigate the in-place hull motion for the Gulf of Mexico environmental conditions, and the measured data were correlated with the numerical tool MLTSIM...
Proceedings Papers

Paper presented at the OTC Brasil, October 29–31, 2013
Paper Number: OTC-24439-MS
..., but the main difference is that it considers the spool, bottom bend span and the upper riser as one single structure; thus the vibration and soil stiffness interaction of the bottom spool is accounted for in the VIV response of the upper riser spans; and viceversa, the vibration response of the riser...
Proceedings Papers

Paper presented at the OTC Brasil, October 4–6, 2011
Paper Number: OTC-22218-MS
... fiber ropes constructed from such materials as aramids, high-modulus polyethylene (HMPE) and polyethylene naphthalate (PEN). These advanced fiber ropes have axial stiffness (EA) properties up to three times an equivalent polyester rope. The effect of mooring ropes with different levels of stiffness...
Proceedings Papers

Paper presented at the OTC Brasil, October 4–6, 2011
Paper Number: OTC-22486-MS
..., where wave and current movements can be stronger, and storm conditions more demanding. Since the mid 1980s, polyester has been the rope yarn of choice for MODU and long-term deepwater moorings for water depths of 1,000-1,500m. Deepwater mooring ropes are a balance of rope strength and stiffness...
Proceedings Papers

Paper presented at the OTC Brasil, October 4–6, 2011
Paper Number: OTC-22735-MS
.... This oversimplified approach can lead to under/over conservative results affecting both mooring system and riser design. A more accurate approach is to separate the permanent elongation of the rope from its non-linear rope stiffness properties. Handling these variables (stiffness and permanent elongation...
Proceedings Papers

Paper presented at the OTC Brasil, October 4–6, 2011
Paper Number: OTC-22569-MS
... similitude modeling parameters were maintained throughout the testing. These included proper modeling of the strength and stiffness of the soil relative to the pipe stiffness as well as the proper weight of pipe for the 305mm (12-in) and 508 mm (20-in) pipe sections tested. The frequencies for the heave...
Proceedings Papers

Paper presented at the OTC Brasil, October 4–6, 2011
Paper Number: OTC-22679-MS
... the opportunity to conduct extensive testing of stiffness and degree of stretch under maximum load for a range of rope constructions, together with 'what if' scenarios by simulating storms and hurricanes, and loop current events with associated vortex induced vibrations on the mooring lines. Using the rope test...

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