... structure reservoir surveillance subsea system production control jacket model industry practice equation upstream oil & gas regular wave santo coefficient standard morison equation offshore technology conference blockage production monitoring university Taylor , P. H...

... directly affecting fatigue performance can be over- simplified. These key issues include: 1. Considerable over simplification of global loads such as the use of max./min. curvature values that have been derived from regular wave analyses. Irregular OTC 18303 New Industry Guidelines for Fatigue Analysis...

... indicates that even for a regular wave, higher harmonic components are present due to non-linearities. Therefore, SDOF method severely overestimates the inertia forces near the natural period, while possibly underestimating the dynamic response further away. This paper recommends a practical frequency...

... vertical and horizontal forces as well as moments about the transverse axis. The model was subjected to both regular waves and wave groups selected from irregular wave spectra. Wave spectra were modelled using a deterministic approach which matched the spectrum shape. The measured waves were scanned...

... loading relative motion regular wave wave length OTC 7698 The Impact of Green Water on FPSO Design B. Buchner, Maritime Research Inst. Netherlands Copyright 1995, Offshore Technology Conference This paper was presemed at the 271h Aimued OTC in HIXISto , Texas, U. S. A., 1.4 May 1995, This paper...

... for very steep waves will be For static regular wave analysis, the procedure for suggested. References are also made to use of calculation of wave plus current forces is shown in apparent regular waves simulating measured Fig. 1 @lg. C.3.2-1 of Ref (l Relating to wave waves traces in irregular seas...

... and current. The magnitude of this additional force reduction depends upon the type of wave, e.g., a single large wave or regular waves. A comparison of the new regular wave model and published peak force measurements on a scale-model structure shows excellent agreement for a wide range of wave heights...

... long wave approximate method crest wave train trough wave kinematic regular wave interaction elevation mechanics wheeler extrapolation wave theory dual component wave prediction upstream oil & gas horizontal velocity frequency component wave spectrum short wave...

... daf upstream oil & gas formulation envelope bottom-founded structure dynamic design random wave spectrum base case offshore technology conference analysis methodology base shear design procedure wave run compliant tower regular wave procedure shear platform dynamic...

... of elementary results to bay and leg results and the comparison of the composed results with measured results to check on interactions. drag coefficient post-critical flow condition regular wave chord flow condition subsea system force sleeve upstream oil & gas random wave model 1 jack-up...

... Abstract A model test programme is described in which the hydro-elastic vibrations of free spanning marine pipelines are studied. A large variety of environmental conditions are covered including steady currents, regular waves, irregular waves and combined steady currents and regular/irregular...

... of directional spreading of ir- regular waves, as it occurs in reality, on the loads and motions of floating offshore structures. See, for instance, ref. [1]. One method of obtaining such information is to conduct model tests in basins fitted with wave generators which have the capability to generate ir- regular...

... the frequency range is twice the wave frequency range. Of the second order motions only the low frequency part will be considered and will be denoted as x (2) . low frequency transfer function model test forward speed computation natural frequency coefficient regular wave tanker surge...

... of the dynamic hydraulic field which is induced in the soil around the structure by a regular wave on the sea surface. The distribution of the excess pore water pressure around the structure, the total forces acting on it, the possible instability or liquefaction of the sea bed are some of the relevant...

... moment of the waterplane area. wave period prediction american bureau time history heave response motion response test phase 1 subsea system wave height regular wave excitation correlation study drilling equipment rao model test mooring system test program frequency upstream...

... of the response using second-order diffraction theory, and (d) assess importance of springing for design. The paper presents: (a) comparisons between measured and predicted regular-wave springing forces on the vertical cylinder, (b) comparisons References and illustrations at end of paper. - - ~ c c - ~. 333...

... to an abstract of nof more than 306 words, ABSTRACT Systematic laboratory measurements were performed to determine the steady drift of isolated, tabular ice-floe models in regular waves. A relatively simple expression for ~the steady wave-induced drift of two-dimen- sional floes of uniformthi'ckness and density...

... in Fig. 1. The direction of waves was longitudinal only, and both ends of the strings were fixed in position by wires. 2 OFFS~ORE PIPELrNE CONST~UCTION BY NEAR-SURFACE TOW METHOD OTC 5337 A Type I string (12.75 in.) was subjected to regular waves with heights of 1.0 to 3.0 meters and periods of 3.7...

... mooring lines. Tests were performed in regular waves and in irregu- lar seas using an IT'IC wave spectrum. Response Am- plitude Operators, (RAQ), were obtained fran the regular wave tests and compared to those calculated by the cross spectrum method fran the tests in ir- regular seas. In addition, RAO's...

... Acting on Offshore Moored Vessels OTC 4813 substituting eq. (19) and (20) into eq. (3) the ap- proximation of the assumed general equation of mo- tion in surge direction of the vessel moored in ir- regular waves can be written as follows: (M+all(p2) + E . j=l,3,5 . {h&(l) + mlj21) + ~mKlj(k~2j(t-T)dT] =j...