... of structures ocean energy technology risers moorings and cable dynamics U.S. Department of Energy 10.13039/100000015 DE-FG36-08GO18179-M001 Wave energy converters (WECs), which harvest energy from the ocean via various mechanisms, have been developing progressively toward...

... and A rctic E ngineering . 04 03 2022 31 08 2022 01 09 2022 26 09 2022 mooring systems buoys coupled analysis mooring line failure design of offshore structures floating and moored production systems risers moorings cable dynamics system integrity assessment...

... flexible riser data are presented again in Fig. 10 . This figure presents four different data sets incorporating 12 mm smooth ( k / D = 1/20,000), 30 mm smooth, 80 mm rough, and 80 mm smooth diameter pipes. Included in this figure are lines of best fit showing the mean and ± 2 standard deviations...

...Decao Yin Deepwater steel lazy wave risers (SLWR) subject to vessel motion will be exposed to time-varying oscillatory flow, vortices could be generated and the cyclic vortex-shedding force causes the structure vibrate, such fluid–structure interaction is called vortex-induced vibrations (VIV...

.... The assessment in both locations is performed for two structural models: an idealized stress spectrum for a generic fatigue hot-spot and a steel lazy wave riser (SLWR) connected to a floating production storage and offloading (FPSO). Fatigue life is estimated using the S–N curve approach. Results show...

...Elvis Jhoarsy Osorio Santander; Bianca de Carvalho Pinheiro; Carlos Magluta; Ney Roitman In the development of oil and gas fields, subsea pipes are used in various applications, like pipelines and risers. During operation, risers can be subjected to accidents, such as collisions with other risers...

... of a steel lazy-wave riser (SLWR) attached to another FPSO. Both works obtained a similar computer time reduction rate of 20, compared with a full conventional FE nonlinear analysis, and the model used was the so-called time delay neural network (TDNN) type, where the delays/steps are considered to be taken...

.... Email: daniel.prata@usp.br fluid–structure interaction risers moorings and cable dynamics vortex-induced vibration Conselho Nacional de Desenvolvimento Científico e Tecnológico 10.13039/501100003593 304600/2016-4 305945/2020-3 437114/2018-0 This paper aims...

... echanics and A rctic E ngineering . 01 06 2020 24 01 2021 27 01 2021 29 03 2021 computational mechanics and design risers moorings and cable dynamics Wires, cables, and ropes are widely used in industry. In the offshore maritime segment, they are used in areas...

...Sang Woo Kim; Svein Sævik; Jie Wu; Bernt Johan Leira As the development of offshore oil and gas continues to move into deeper waters, the risers connecting the seabed infrastructure to the offshore platform are getting longer. This means that vortex-induced vibration (VIV) may occur at different...

... of the FPS with its mooring lines and risers. Then, it automatically evaluates equivalent six degrees-of-freedom (6DOF) stiffness matrices and force vectors representing the whole array of lines. Finally, these matrices/vectors are transferred to the dynamic analysis, solving the global 6DOF equations...

... the weakly coupled models of the floaters and its systems of risers and mooring lines using the DYNASIM computer code [ 27 ]. In these weakly coupled models, lines and risers are represented by the corresponding geometric catenary equations (quasi-static analysis) and the hydrodynamic loads acting on them...

...Decao Yin; Halvor Lie; Jie Wu Exploration of oil and gas in deep and ultra-deepwater under harsh weather condition is challenging. A steel lazy wave riser (SLWR) is considered to be a cost-effective alternative to get the gas or oil flow up to the platform under these conditions. The staggered...

... equation is used to assess the dynamic stability of a top-tensioned riser (TTR) in order to prevent the parametric resonance which leads to detrimental effects on structural integrity. The objectives of this paper are to (i) study a Mathieu stability diagram and its coefficients for an assessment...

... . 23 08 2018 12 08 2019 16 08 2019 05 09 2019 taut-wire mooring system hybrid mooring lines fatigue analysis synthetic fiber rope dynamic stiffness damage effect floating and moored production systems risers moorings and cable dynamics system integrity assessment...

... damage due to higher harmonics in VIV prediction. In the present paper, representative VIV data from various riser model test campaigns are carefully studied and analyzed. The key parameters that influence the magnitude of the third-order harmonic stress are found to be the bending stiffness, the reduced...

..., 2018; published online June 28, 2018. Assoc. Editor: Marcelo R. Martins. 14 10 2017 03 05 2018 Floating Ocean space utilization Wave mechanics Ship motions Risers Cable dynamics Moorings Wave effects Moored production systems Proof . Define an error state, ϑ...

...H. Marcollo; A. E. Potts; D. R. Johnstone; P. Pezet; P. Kurts Drilling risers are regularly deployed in deep water (over 1500 m) with large sections covered in buoyancy modules. The smooth cylindrical shape of these modules can result in significant vortex-induced vibration (VIV) response, causing...

.... Assoc. Editor: Marcelo R. Martins. 16 08 2017 07 05 2018 Computational mechanics Hydrodynamics Risers Ship motions Risers Cable dynamics Moorings Cable dynamics Towed marine seismic streamer cables are used extensively for exploring the oceans for prospecting oil...

...Baiquan Chen; Jianxing Yu; Yang Yu; Lixin Xu; Han Wu; Zhenmian Li A three-dimensional (3D) finite element analysis (FEA) model of top-tensioned riser (TTR) with hydropneumatic tensioner is proposed in this work. First, the tension calculation equation of the hydropneumatic system is derived...