... connector gas monetization model test symo system liquified natural gas mooring system calculation lng carrier upstream oil & gas surge motion terminal single buoy leen poldervaart midstream oil & gas basin Copyright 2004, Offshore Technology Conference This paper was prepared...

... nonlinear surge motion crane barge vannahme ellermann subsea system subharmonic oscillation Copyright 2000, Offshore Technology Conference This paper was prepared for presentation at the 2000 Offshore Technology Conference held in Houston, Texas, 1 4 May 2000. This paper was selected...

... at sea surface 10000 1.58 13.6 3.0 116 3000 0.53 13.3 1.0 73.4 6000 0.53 13.3 1.1 76.7 Pitch 10000 0.53 13.3 1.1 74.4 The degree of reduction in surge motion, pitch and heave can be seen in Table 5. Table 5 Reduction from De-coupled to Coupled Analysis Total Response LF Response Response Water Depth (ft...

... new concept experimental result florian racine current profile upstream oil & gas subsea system water depth surge motion pitch motion concept offer otc 7768 100-year storm initial tension platform random wave tensioned tether buoyancytank spectrum storage offshore...

... frequency foil system surge motion OTC 7143 The Reduction of Low-Frequency Motions of Moored FPSO s J.A. Pinkster and H,R. Luth, DeIft U, of Technology Copyright 1993, Offshore Technology Conference This paper was presented at the 25th Annual OTC in Houston, Texas, U.S.A., 3-6 May 1993, This paper...

... frequency amplitude reaction force high frequency motion equation wave drift force proceedings model test simulation chain-turret-moored tanker upstream oil & gas tanker frequency motion technology conference procedure wave frequency surge motion mooring system moored...

... spectra turbulence drift force wind speed model test wind spectrum wind velocity computation wave drift force tanker surge motion wind spectra frequencymotion wind force wave spectrum resultsof tot spectral density frequency spectrum upstream oil & gas OTC 6605...

... the determination of the chain damping due to the oscillating motions of the low frequency surge motion only. In this case the relative importance of the contribution of the chain damping to the total low frequency damping has been investigated. Therefore low frequency motion simulations have been carried out...

...] and Huijsmans [4]. offshore technology conference frequency tether force tension leg platform wave drift current basin model experiment extinction test coefficient motion behaviour tlp surge motion subsea system drift force ves-vc okn basin amplitude aTC 6180 Combined Effect of Waves...

... contribution. The physical explanation is thclt the transverse line motion n (Fig. 1) can be much larger than the surge motion s. The energy dissipation due to drag forces on the lines, and thus the surge damping, can be considerably larger than that of the vessel itself. Ref. 1 analysed the mooring line...

... of the diagrams will be as follows: 1. 2. 3. 4. be For mooring line No. 1 calculate so as Q = Solcosal where so a am With amplitude of the resonant surge motion of the moored vessel angle between direction of vessel surge and direction of line (in the horizontal plane) relevant values of sfi, H, R, Tfi and EA...

... low frequency transfer function model test forward speed computation natural frequency coefficient regular wave tanker surge motion wave drift force surge direction frequency quadratic transfer function wave-current interaction effect moored tanker equation OTe 5631 Wave...

... time series tanker simulation displacement wave frequency frequency barge upstream oil & gas surge motion artificial intelligence realisation subsea system wave spectrum equation variance wave drift spectrum coefficient significant wave height prediction mooring system...

... position. The line will essentially be in static equilibrium at all times. The tension perturbation can be calculated using a static catenary equation. procedure dwt tanker low frequency surge motion turret low frequency motion coefficient frequency surge motion upstream oil & gas...

... from model tests in regular waves calculations. F = 2 f o 00 8 f St;(w).swIT(W,w12 dw o mass of the vessel = added mass damping including effect of still water and wave drift damping (see ref. [8]) = spring coefficient of the linear mooring system F(t) = low frequency wave drift force = surge motion...

... upon the surge motions. Let now AZ be (Fig. 2) AZ = Zu - z~ . . . [3] . . . . [6] . [4]NUMERICAL CALCULATION OF ENERGY DISSIPATION FROM MOORING LINES -- Fig. 1 shows the coordinate system for one line. The line tension Tt is the vector sum of a horizontal component To (which in the static case...

...Computations of Nonlinear Surge Motions of Tension Leg Platforms by Nils Sakesen, Christian H. von ~erczek, Dick K. Yue, and Frederick Stern, Science Applications, kc. COPYRIGHT 1982 OFFSHORE TECHNOLOGY CONFERENCE I This paper was presented a t the 14th Annual OTC i n Houston, Texas, May 3-6 , 1982...

...OTC 4437 On the Low-Frequency Surge Motions of Vessels Moored in High Seas by J.E.W. Wichers, Netherlands Ship Model Basin COPYRIGHT 1982 OFFSHORE TECHNOLOGY CONFERENCE This paper was presented at the 14th Annual OTC in Houston, Texas, May 3-6, 1982. The material is subject to correction...

... sea state leg platform wave spectrum ii transfer function tether frequency surge motion amplitude coefficient means natural period tension leg platform basin computation pretension force subsea system water depth surge motion platform OTe 4074 THE WAVE INDUCED MOTIONS OF ATENSION...

...], [2J and [3J). These forces, though small in magnitUde, are the cause of the low-frequency, large-amplitude, horizontal motions sometimes ob- served during model te-sts"and on prototype vessels moored at sea. An example of these low-frequency, large-amplitude surge motions, in irregular head seas...