... and wellhead/casing systems using a site-specific scatter diagram of LCE. A scatter diagram consists of a number of full-depth current speed profiles and associated probabilities of occurrence for each profile. Scatter diagrams often consist of too many current profiles, which can make the VIV analysis...

... having complex geometries and connections such as jacket-type support structures. This paper presents the study on the applicability of the spectral fatigue analysis method to OWT support structures and the use of the scatter diagram lumping method to accelerate the time-domain fatigue analysis...

... pod mode drilling riser scatter diagram return period extreme current profile current profile upstream oil & gas probability fatigue analysis current speed pod coordinate orthogonal decomposition riser surface current speed extreme profile accuracy current speed magnitude...

... data format wind sea wave height monita system fpso scatter diagram OTC 20869 Wave Measurements for the Monitas System Jeff Hanson/WaveForce Technologies, Andrea Lübben/OceanWaves, Pieter Aalberts/MARIN and Miroslaw Lech (Mirek) Kaminski/MARIN Copyright 2010, Offshore Technology Conference...

... the spectral shape of the process is more broad-banded than the form assumed in developing the spectral procedure. touchdown 1 machine learning stress time history stress process artificial intelligence spectral method simulation arc length scr fatigue life scatter diagram damage estimate...

... Criteria Gives details on parameter selection associated with calculating fatigue damage from local armour wire stresses. OTC 18303 3 The Guidelines also contains a set of annexes that give supplementary information on the following topics: Generation of Deterministic Scatter Diagrams Gives methods...

... Abstract This paper describes a scatter diagram approach for the classification of large numbers of current profiles for use in the prediction of riser fatigue damage due to vortex-induced vibration. Scatter diagrams have long been used to characterize the probability of various combinations...

... at the Mars field. steel tube umbilical dynamic steel tube irregular seastate steel tube dynamic steel tube umbilical load case calculation coefficient deepstar umbilical otc 8730 subsea system scatter diagram fatigue life design life bend stiffener deepstar dynamic umbilical...

... by thestructural member to reach steady state, given the wind is at the critical windspeed. The third correction factor, Y bin , accounts for the use ofdiscrete wind speed and direction scatter diagrams rather than smooth windspeed probability density functions. probability computation lock-in bandwidth...

... acceleration voyage acceleration climate scatter diagram ship motion climate computation resistance marine transportation procedure wave period scenario wave height aalber probability statistics voyage wave climate calculation seastate OTC 8123 Voyage Acceleration Evaluation of Design...

... analysis. 1. Develop a transfer function for nor- mal force on the wear surface and relative sliding distance. This involves a global analysis of the platform under waves of various fre- quencies, as in a standard spectral fatigue analysis. 2. For each seastate in the scatter diagram, determine the maximum...

... approach over all environmental variables. The results of these two approaches are shown in Fig. 3. A scatter diagram is based on measurements over a limited time period. Applying only measured values can be compared to truncating the distribution of Hs and Tz at the most extreme events occurred within...

... represent periods of time from 20-50 years, sufficient time for statistical models to be accurate. During the short durat i on of a 60 day tow, the statist ical val idity of expected conditions is subject. Nonetheless, scatter diagrams representing expected conditions were used with the intent of evaluating...

... frequency calculation fatigue life analysis fatigue damage fatigue life marginal distribution wave height upstream oil & gas history scatter diagram fatigue analysis wave theory variation riser wave zone iteration block stress range seastate domain method aTe 5468...

.... The wave height sensor is a down-looking infrared device that operates on timed pulses. wind speed wave height hutton tlp performance monitoring artificial intelligence verification program scatter diagram sensor machine learning tlp status performance data prediction storm standard...

... structures. A mean water depth of 25m was adopted in each case. The statistical analyses were based upon a scatter diagram for Carmarthen Bay, UK, which is one of the areas identified as being of possible development potential for offshore windpower. CURRENT PRACTICE The use of a deterministic approach...

... reliability limit-state design platform criteria checking format api wid ratio interaction ratio coefficient scatter diagram strength resistance load combination safety index upstream oil & gas partial coefficient soil case dor load case subsea system gravity load...

... from measurements, ship observations or hindcasts. For fatigue analysis, wave data are normally defined by a seastate scatter diagram. The seastate scatter diagram is the joint distribution of seastate magnitude (such as significant wave height, H s ) and seastate period (such as zero-crossing period...

... maximum sea state scatter diagram tow route space frame model barge motion subsea system tow line tug tow theoretical fatigue damage stress range calculation critical motion curve fatigue damage OTC 4163 FATIGUE CONSIDERATIONS FOR OCEAN TOWAGE by Edmund C. Hambly, Antony J. Edwards, Colin...

... techniques are applied to evaluate short-term stress statistics at the hot spots for each sea state in the annual directional wave scatter diagrams for the platform location. Directional spreading of wave energy is included in the analysis. The calculated short-term statistics are combined with the wave...