Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Ralf Peek"'
Publikováno v:
Volume 4: Pipelines, Risers, and Subsea Systems.
This paper describes a multi-pronged continuous improvement effort to manage the spans of a deep-water pipeline, where even without wave action, the currents are strong enough to move sediments, leading to constantly changing spans. The effort includ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::11d664fa9e37f6c065e54d3208397a57
https://doi.org/10.1115/omae2021-63458
https://doi.org/10.1115/omae2021-63458
Autor:
Meliza Atienza, Decao Yin, Halvor Lie, Ralf Peek, Chiara Bernardo, Octavio E. Sequeiros, Sze Yu Ang, Elizabeth Passano, Jie Wu
Publikováno v:
Journal of Offshore Mechanics and Arctic Engineering. 143
Helical strakes can suppress vortex-induced vibrations (VIVs) in pipelines spans and risers. Pure in-line (IL) VIV is more of a concern for pipelines than for risers. To make it possible to assess the effectiveness of partial strake coverage for this
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::741da50998acf5b5ca96e5036b5e5a6c
https://doi.org/10.1115/1.4048660
https://doi.org/10.1115/1.4048660
Key uncertainties in the assessment of subsea pipeline spans for fatigue due to vortex-induced vibrations (VIV) are the effective axial force, the soil spring stiffness, and the soil damping. To reduce these uncertainties, pluck tests have been carri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::775022c392404338fb6c4c102f7101d4
https://engrxiv.org/qypj7
https://engrxiv.org/qypj7
Autor:
Ralf Peek
Publikováno v:
Journal of Offshore Mechanics and Arctic Engineering. 142
Although it has long been recognized that vortex-induced vibrations of subsea pipeline spans involve nonlinear and inelastic behavior, the current practice to assess such spans for fatigue and ultimate loading conditions is based on the modal analysi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f77db1134200c856ca07adff8f563452
https://doi.org/10.1115/1.4047103
https://doi.org/10.1115/1.4047103
Autor:
Halvor Lie, Decao Yin, Elizabeth Passano, Ralf Peek, Meliza Atienza, Octavio E. Sequeiros, Chiara Bernardo, Sze Yu Ang, Jie Wu
Publikováno v:
Volume 2: CFD and FSI.
Excitation and added mass functions determined from forced vibration tests of a rigid cylinder undergoing harmonic motion in the flow are used in the semi-empirical software VIVANA to predict the VIV response of pipelines. An advantage of this approa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cb4f36fe810adeb0e30ac4a408e4da4f
https://doi.org/10.1115/omae2019-95972
https://doi.org/10.1115/omae2019-95972
Autor:
Sze Yu Ang, Elizabeth Passano, Meliza Atienza, Octavio E. Sequeiros, Decao Yin, Jie Wu, Chiara Bernardo, Ralf Peek, Halvor Lie
A series of experiments is performed in which a strake-covered rigid cylinder undergoes harmonic purely in-line motion while subject to a uniform “flow” created by towing the test rig along SINTEF Ocean’s towing tank. These tests are performed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::18b7776f067e4d11628b0e8d4ebf42c0
http://hdl.handle.net/11250/2640095
http://hdl.handle.net/11250/2640095
Publikováno v:
Applied Ocean Research. 111:102407
Natural frequencies, mode shapes and modal damping ratios must be estimated to assess subsea pipeline spans for vortex-induced vibrations (VIV) and response to direct wave loading. Several approximate solutions exist for a linearly elastic pipe under
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e38f5327660debf008e2363f28376a9
https://doi.org/10.1016/j.apor.2020.102407
https://doi.org/10.1016/j.apor.2020.102407
Publikováno v:
Volume 5: Pipelines, Risers, and Subsea Systems.
In shallow waters, subsea pipelines can suffer fatigue damage from Vortex Induced Vibrations (VIV) by the combined effects of waves and currents. A full characterization of the joint probability distribution of waves and currents involves at least 5
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0291d55642da116764d5a5bbe00fa448
https://doi.org/10.1115/omae2018-77455
https://doi.org/10.1115/omae2018-77455
Autor:
Jeffrey G. Rimmer, Sebastiaan Frankenmolen, Malcolm Carr, Ralf Peek, David White, Sze Yu Ang, Ian MacRae
Publikováno v:
Day 3 Wed, May 03, 2017.
Thermal gradients from a heating front travelling down a flowline at start-up can cause a flowline to walk much like a worm creeps by repeated contractions and expansions of its body. To stop this for the Malampaya flowline, pipe-clamping mattresses
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d3ac7e14c3c215bf229aee1c63b3f8fd
https://doi.org/10.4043/27815-ms
https://doi.org/10.4043/27815-ms