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Keywords: excitation
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Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2020
Paper Number: OTC-30708-MS
... structural riser excitation wir system prelude flng marine growth intake riser preparation wir G. Kuiper , A. Metrikine , M. Efthymiou , Instability of a simplified model of a free hanging riser conveying fluid , International Conference on Ocean, Offshore and Arctic...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2018
Paper Number: OTC-28747-MS
... Abstract Piping systems having flow discontinuities like bends, tees, reducers and valves can experience acoustic induced vibration (AIV) or flow induced vibration (FIV) due to internal pressure fluctuations (acoustic or turbulent flow sources of excitation). The excitation may range from 20 Hz...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27637-MS
... lateral interaction trench resistance soil profile truss interaction excitation steel catenary riser riser embedment vertical interaction strength scr shear strength offshore technology conference upstream oil & gas pipe initial embedment horizontal interaction...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27668-MS
... typical wave frequency responses. In relatively benign conditions associated with ROV-based inspection activities, torsional vibrations in deep water wire rope sections were observed. In a moderate water depth system, vortex induced vibration (VIV) excitation of a wire rope segment, leading to high...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2016
Paper Number: OTC-27230-MS
... are developed to assess subsea systems under seismic loads. Sensitivity studies are conducted on parameters such as soil damping, soil-pile interface gapping, and multilevel excitation to simulate the response of subsea structural system. Computer model was generated, and nonlinear seismic response...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 2014
Paper Number: OTC-25206-MS
... template structure subsea system loma prieta earthquake ground motion input approach depth-varying ground motion input offshore technology conference upstream oil & gas prediction excitation analytical prediction reservoir characterization earthquake step wave centrifuge...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2012
Paper Number: OTC-23672-MS
.... frequency fatigue damage strouhal number diameter riser configuration experiment offshore technology conference buoyancy section vortex-induced vibration slwr pipe excitation curvature response upstream oil & gas otc 23672 buoyancy module viv response OTC 23672 Buoyancy Spacing...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 2010
Paper Number: OTC-20366-MS
... 20366 wave excitation sustainability relative wave motion excitation subsea system generator body 1 social responsibility draught upstream oil & gas sustainable development pitch motion energy conversion ocean energy wave energy conversion renewable energy reservoir characterization...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 2004
Paper Number: OTC-16343-MS
... prediction was still a challenging task. A part of the results from the workshop was incorporated into the new Appendix H - Spar Mooring Design for Vortex Induced Motion in RP 2SK Station-Keeping for Floating Structures. viv motion test result viv amplitude spar excitation amplitude field data...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 2003
Paper Number: OTC-15289-MS
... Abstract Recent experiences with eddy currents in the Gulf of Mexico have highlighted the dynamic VIV responses of risers and tendons. However, it has also been observed that excitation of these members can lead to subsequent excitation of the entire floating platform structure, including both...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 2003
Paper Number: OTC-15235-MS
... severe environments. Such strings are subject to axial excitation from the heave motion of the vessel and from lateral excitation arising from vessel surge and sway and from wave and current loading. These strings often consist of drill pipe, casing and casing landing strings, marine drilling riser...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2000
Paper Number: OTC-11994-MS
... of the top of the riser induces non-repeatingout-of-plane displacements. In general, response is reasonably narrow-bandedwithin one half-cycle of top excitation, but there can be large differences inthe frequency of the oscillation from one half-cycle to the next. Analysis ofthe data did not reveal any...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 1999
Paper Number: OTC-10931-MS
... upstream oil & gas drilling riser oscillation excitation calculation Copyright 1999, Offshore Technology Conference This paper was prepared for presentation at the 1999 Offshore Technology Conference held in Houston, Texas, 3 6 May 1999. This paper was selected for presentation by the OTC...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 1999
Paper Number: OTC-10953-MS
.... The pitch/heave instability problem, which is revealed in this work, could probably not have been found using state of the art commercial calculation tools. The design philosophy behind deep draft floaters in general implies that the draft is adequately large to reduce 1.order heave excitation sufficiently...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 1998
Paper Number: OTC-8662-MS
... Abstract In this paper we consider model basin measurements of random wave excitation of a TLP and the associated tendon tension. The tendon tension power spectrum exhibits a peak at the wave excitation frequency and a smaller, but still significant, peak at the higher vertical plane natural...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 1995
Paper Number: OTC-7813-MS
... SUMMARY The present report describes an investigation quantifying to what extent the springing excitation on a tension leg platform can be fully described by quadratic wave forces, or whether third and/or higher order forces make a significant part of the excitation. The applied method...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 1994
Paper Number: OTC-7488-MS
... step oscillation lifting irregularity subsea system formulation offshore technology conference mooring system excitation proceedings OTC 7488 Deepwater Mooring Line Dynamics With Emphasis on Seabed Interference Effects D.O. Thomas and G.E. Hearn, Newcastle U. C~pyrlght 1994, Offshore...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 1994
Paper Number: OTC-7489-MS
... 1.ABSTRACT The resonant response of moored floating structures due to low-frequency excitation is controlled primarily by the effective damping coefficient of the structure. A Joint Industry Project addressed the feasibility of predicting the various components of the damping coefficient...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 1992
Paper Number: OTC-6887-MS
.... minimum tension case tendon tension interaction variation analytical method tlp tendon tension tlp excitation participant subsea system tension case relative importance variability upstream oil & gas pretension allowance technology conference engineering judgement mean tension...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 1992
Paper Number: OTC-6896-MS
... and fatigue responses are analyzed. The results demonstrate that concrete hull platforms are competitive also beyond 3,000 ft. High natural periods can be acceptable for the tether system provided that the platform geometry gives low excitation at roll/pitch resonance as well as low responses at higher...

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