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Keywords: transfer function
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Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2023
Paper Number: OTC-32281-MS
... at tower bottom and hull inertia load are calculated using stress transfer functions for unit loads at tower bottom and unit accelerations on the hull mass. Wave pressure RAO by unit amplitude wave is calculated using a wave radiation/diffraction analysis program, and stress RAO by wave pressure RAO...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2020
Paper Number: OTC-30650-MS
... heating technology electrically trace formula inductance offshore technology conference efficiency conductor capacitance transfer function eth cable eth cable model resistance B. Ansart , A. Marret , T. Parenteau , O. Rageot : Technical and Economical Comparison...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2018
Paper Number: OTC-28747-MS
... frequency domain based finite element analysis (FEA) approach/design-tool to calculate the fatigue damage of piping systems due to FIV or AIV. For a FIV analysis, the two key steps that can be identified in this approach are: (1) the development of a transfer function, and (2) the generation of a pressure...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27562-MS
... Loggers (SVDLs) were run with the riser and retrieved via Remotely Operated Vehicle (ROV). Fatigue damage reconstruction in the wellhead, conductor and surface casing was performed directly using the measured motion data and an analytical transfer functions obtained from the calibrated Finite Element (FE...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27613-MS
... Current subsea wellhead fatigue monitoring systems typically measure subsea BOP stack response and convert accelerations directly to the stress on various critical wellhead components using transfer functions. The veracity of this process relies on the accuracy of input data and the numerical...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2016
Paper Number: OTC-27216-MS
... of Spectral fatigue assessment explained here is adopted from API RP 2A-WSD [3] and ABS Fatigue Assessment Guideline [2]. Fatigue damage in this method is a product of stress spectrum which is produced by crossing the product of stress response transfer function and wave response spectrum in frequency domain...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2016
Paper Number: OTC-27205-MS
... fatigue method has been recently developed and is based on analytical transfer functions used to convert measured accelerations into curvature. Another method considers FEA-based transfer functions. Some of these methods perform fatigue calculations in time domain while some others in frequency domain...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2016
Paper Number: OTC-27280-MS
... transfer function, are generated using spectral fatigue method. Damage of the hot spots for a given sea state is carried out using products of the hot-spot stress response spectra. For reliability analysis, the limit state for fatigue damage is formed in terms of fatigue damage, fatigue capacity...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2015
Paper Number: OTC-25684-MS
... noise frequency displacement motion measurement fatigue damage upstream oil & gas measurement device response measurement wellhead system calibration fatigue life bop transfer function assessment wellhead fatigue Ward , P. and Rimmer , A. - Evaluation of Wellhead...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 2014
Paper Number: OTC-25403-MS
... wellhead stress flagpole frequency prediction natural frequency bop stack frequency transfer function fatigue damage upstream oil & gas surface current strong surface current svdl displacement motion data submerged current wellhead vibration equation mode shape damage rate...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2013
Paper Number: OTC-24116-MS
... uncertainty distribution at each unsampled location. The resulting collection of spatial distributions is subsequently inserted into physical models, which translate the geological parameters into financial or operational performance indicators. These models, the so called utility or transfer functions, can...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2013
Paper Number: OTC-24043-MS
... probability requirement subsea system sea state south china sea motion response transfer function response spectrum offshore technology conference OTC 24043 Liuhua 11-1 FPS Dry-dock Upgrade and Life Extension - Motion Analysis and Weather Window Selection for Towing L. Yang, H. Yang, S.G. Huang...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2012
Paper Number: OTC-22967-MS
... learning reservoir characterization indian school upstream oil & gas prediction well log data application artificial neural network neural network transfer function 2012. Offshore Technology Conference ...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2011
Paper Number: OTC-21291-MS
... to obtain the motion response spectra of the support vessel and suction pile motions. The same transformation has been performed for the forces logged in the wire. By dividing the motion and force response function of the suction pile by the support vessel response spectrum the transfer function or RAO...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 2008
Paper Number: OTC-19367-MS
... for Classification of Ships Pt.3 Ch.1. supply boat procedure requirement statistics limit state floating production system loading condition structural design overview strength evaluation calculation upstream oil & gas offshore technology conference transfer function hull girder assessment...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2002
Paper Number: OTC-14228-MS
... equipment, and re-injection facilities. requirement topside support stool fpso fatigue analysis dwt fpso stress contour subsea system support stool fatigue life riser support floating production system collision upstream oil & gas hencky-von mise stress contour transfer function...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 1998
Paper Number: OTC-8772-MS
... to account for the mooring loads, risers, bearings, etc. dataset procedure consideration subsea system longitudinal stiffener freight & logistics services grid area transfer function marine transportation requirement mooring system corrosion fatigue damage fatigue life severity...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 1998
Paper Number: OTC-8662-MS
... i +j T~' = III, I'll<' cubic transfer function He(i. J. lpn'sents till' stn'llgth of t hp i + j + ~. = IJ I intpractiOll. Detailed informatiun on dptprmining lfL. Hid all/] H" arp givpn in [G]. Hprp WI' SUIlIIlI,ll'izp thp kp\' idl'as, I'll<' approadl is based on nlinimizing t lH' nl/'an sqllm...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 1998
Paper Number: OTC-8737-MS
... reduced to 4 for the analysis. Each seastate was characterized by a Pierson-Moskowitz wave spectrum. No blocking of the seastates was performed, instead each seastate wave was included in the fatigue analysis. Transfer Function Waves A wave steepness of 1/20 was assumed. A maximum wave height of 27.9 feet...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 1997
Paper Number: OTC-8272-MS
.... Introduction The theoretical approach to mooring problems has been advanced considerably in the last decades. In 1971 theoretical knowledge of mooring systems did hardly exist. With the establishment of the 3-D diffraction theory in 1976, see Ref. 1, computations of the transfer functions of first order...

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