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Keywords: excitation
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Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2024
Paper Number: OTC-35174-MS
... demonstrate proficiency in estimating the platform's response to wave-induced excitation. Pitch, roll, and heave are predominated by wave excitation forces, and a stand-alone MRU can efficiently estimate these motions. These DOFs are critical for assessing excitation motions at the fairleads. The MRU...
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
... of the SCR. However, other sea states, soil conditions, and geometries may show substantially different results that should be investigated. lateral interaction trench resistance soil profile truss interaction excitation steel catenary riser riser embedment vertical interaction strength scr...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27668-MS
... 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 frequency oscillations of chain links within the chain hawse tubes on a turret moored system, were also observed. These oscillation...
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
...OTC-25206-MS Centrifuge Study of Offshore Platform Response to Earthquake Excitations Richard W. Litton, Energo Engineering; Mark E. Stringer, UC Davis; Edward C. Clukey, BP America; Jiun-Yih Chen, Energo Engineering; Bruce L. Kutter, Daniel W. Wilson, and Bao-Li Zheng, UC Davis; and Yan-Gou Zhou...
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
.... - The system can be used in deep and shallow water and is independent of the tides. - The length of the Green Water Concept will be chosen so that the period of maximum pitch excitation is close to the dominant wave period at the field location in moderate seastates. By ballasting it is possible to tune...
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
... platform frequency tendon 1 current velocity pontoon tendon information viv response fatigue damage rate allegheny hull eddy excitation agip petroleum co magnitude upstream oil & gas reservoir simulation coherence otc 15289 OTC 15289 Analysis of TLP VIV responses...
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 observed VIV displacements is quite chaotic and a regular sinusoidal displacement of the top of the riser induces non-repeating out-of-plane displacements. In general, response is reasonably narrow-banded within one half-cycle of top excitation, but there can be large differences in the frequency...
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
...~. gin'n excitation and rp- ~POlI~p time series data. has a long history. much of which is summarized in [6]. TllP early modeh; wpre limited to spcond-ordpr (i.e .. the~' contained a linear and quadratic conlponpnt) awl Gaussian pxcitation [7]. The requin'ment of Gaus~ian excitation wa~ re!<lxpd in lU1)8...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 1995
Paper Number: OTC-7813-MS
...OTC 7813 Third and Higher Order Content of TLP Springing Excitation Erling Huse and Carl Trygve !%ansberg, MARINTEK Notway Copyright 1995, Offshore Technology Conference This paper was presenled at the Z th Annual OTC in Houston, Texas, U.S.A., 1-4 May 1995. This paper was selected for presentation...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 1994
Paper Number: OTC-7488-MS
... the intersection of the parabola with the seabed; the distance from the last grounded node to this point is then Alj _ ~. Results The mooring line upper endpoint excitation function is de- fined as U1 = !l~ + (1 - ecnAf)&sinnAi + ~e), (18) where & is the amplitude of the excit at ion function, Me is the frequency...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 1994
Paper Number: OTC-7489-MS
... of where and by whom the paper Is presented. 1 ABSTRACT The resonant response of moored floating structures due to low-frequency excitation is controlled primar- ily by the effective damping coefficient of the struc- ture. A Joint Industry Project addressed the feasibility of predicting the various...
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 &amp; gas pretension allowance technology conference engineering judgement mean tension...

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