... inspection strain gauge fatigue damage probability time series reconstruction fatigue life standard deviation spectrum Background Inspections of offshore assets may be an expensive process. Costs are related to planning, mobilization, inspection, and impact on operations. Undetected damages...

... velocity potential upstream oil & gas environmental condition domain analysis frequency mean wind speed offshore renewable irregular wave model statistics ocean energy weibull distribution amplitude significant wave height incident wave application spectrum offshore technology...

... coverage with minimum spatial resolution of 6 minutes (0.1deg). renewable energy consistency offshore technology conference wave spectra upstream oil & gas partitioned data spectra spectrum modeling & simulation wave model partition meteorological event resolution generation...

... wind energy bayesian inference upstream oil & gas inspection flowline corrosion materials and corrosion riser corrosion prediction estimation measurement data structural member fatigue damage spectrum renewable energy information evaluation posterior distribution offshore...

... at various sites, mostly covering calm weather conditions. upstream oil & gas radar doppler frequency spectra social responsibility detector coastal water fm noise filter offshore technology conference spectrum sustainability internal noise raw data filter footprint time series...

... spectrum upstream oil & gas equivalent confidence interval high-definition geomagnetic model emag2v3 geomagnetic field bggm information model residual spatial resolution field model trajectory design magnetic measurement hdgmx geomagnetic model offshore technology conference...

.... This paper intents to compare the seismic responses for a fixed offshore structure by employing ground motion records generated using three different methods. The design spectrum determines the seismic hazard of a region. Therefore, it is necessary to use acceleration records compatible with the design...

... , Washington, DC, USA . Chakrabarti SK ( 2005 ). Handbook of offshore engineering . 1st ed. , Elsevier , Amsterdam , 275 – 293 . Cho , Hongyeon , Hyuckmin Kweon , and Weonmu Jeong . "A study on the optimal equation of the continuous wave spectrum." International Journal...

... spectrum wind speed onshore frame structure stress concentration factor vortex vibration fatigue damage frame structure air emission end fixity mean wind speed fatigue life British Standard, EN 1993-3-1 : 2006 , Design of steel structures DNV-RP-C205 , Edition April 2014...

... fluctuation spectrum over the frequency range of interest. The transfer function defines the relationship between the stress range (∆σ) and a unit pressure fluctuation (∆p) that is used to calculate the fatigue damage. It is assumed that the stress range reaches a maximum when the internal acoustic pressure...

... With oil and gas exploration venturing into more seismic prone regions for global deep water developments, seismic assessment of subsea structures becomes a fundamental part of the design requirements of regulations, industrial codes and standards. This paper demonstrates a response spectrum...

... to a specific generation region on the ocean surface. Wave vector history plots showed that the Trinidad wave field was typically a mixed sea and regional swell field with occasional long-period swell events from distant storms. frequency wave height mooring system swell event spectrum wave field...

... is presented to stimulate future developments. us government period range site response analysis short period offshore structure vertical design spectrum vertical motion upstream oil & gas offshore site ground motion water layer design spectra reservoir characterization spectra eurocode...

... a cluster centre (strictly the centroid or centre of mass). All members of a given cluster are more similar to the cluster centroid for that cluster than to any other cluster centroid. It is reasonable therefore to assume all the members of the cluster might be represented by just one directional spectrum...

... is irregular. Random waves for each sea state and direction lead to different structural responses. These structural responses will be formulated as stresses change in time or frequency domains. Typically, stress spectrum in frequency domain will be used in Spectral fatigue assessment. The methodology...

... Figure 3 The reference site: Apalachicola, Florida [11] OTC-27280-MS 3 Spectral Faitgue Assessment Approach For fatigue assessment of the brace-column connection, the spectral fatigue approach uses the shape of the hot-spot stress spectrum to determine the number of stress cycles. The number of stress...

... to use inversion QC's to indicate the value of broadband seismic in the inversion stage. We will show some results from our initial experiences in this area. spectrum reservoir characterization wavelet inversion result offshore technology conference conventional inversion low frequency...

... is high over all the bandwidth. low frequency seismic data spectrum offshore technology conference upstream oil & gas broadband well-tie naeini seismic inversion quantitative interpretation reservoir characterization bandwidth data conditioning broadband seismic well-tie broadband...

... extend the solution to include wave-structure interaction in irregular sea waves and vessel motions. Irregular waves are modelled using a JONSWAP wave spectrum. Simulations are performed to investigate effect of significant wave height, peak wave frequency (time period) of irregular sea waves, and vessel...

... are imposed at the velocity inlet boundary using Jonswap frequency spectrum and cosine-2s directional spreading function. Wave slamming loads and the structural responses depend on many factors, like sea state, FPSO speed, draft, wave heading angle, local structure etc. In this paper, we have analyzed...