Zobrazeno 1 - 10
of 63
pro vyhledávání: '"Josh, Davidson"'
Publikováno v:
Symmetry, Vol 16, Iss 9, p 1252 (2024)
Simulating the free decay motion and wave radiation from a heaving semi-submerged sphere poses significant computational challenges due to its three-dimensional complexity. By leveraging axisymmetry, we reduce the problem to a two-dimensional simulat
Externí odkaz:
https://doaj.org/article/e2e1b178e775435cb06c93d92e948352
Publikováno v:
IET Renewable Power Generation, Vol 15, Iss 14, Pp 3109-3125 (2021)
Abstract The oscillating‐water‐column (OWC) spar‐buoy is a type of wave energy converter that may exhibit undesirable large roll and pitch amplitudes caused by a dynamic instability induced by parametric resonance. The occurrence of this phenom
Externí odkaz:
https://doaj.org/article/afd8035f282f4b4cba1b0d94855ae839
Publikováno v:
Journal of Marine Science and Engineering, Vol 9, Iss 11, p 1162 (2021)
Exploiting parametric resonance may enable increased performance for wave energy converters (WECs). By designing the geometry of a heaving WEC, it is possible to introduce a heave-to-heave Mathieu instability that can trigger parametric resonance. To
Externí odkaz:
https://doaj.org/article/828de9751a8a4dbabb1386fba36d7cc1
Autor:
Luofeng Huang, Yuzhu Li, Daniela Benites-Munoz, Christian Windt Windt, Anna Feichtner, Sasan Tavakoli, Josh Davidson, Ruben Paredes, Tadea Quintuna, Edward Ransley, Marco Colombo, Minghao Li, Philip Cardiff, Gavin Tabor
Publikováno v:
OpenFOAM® Journal. 2:116-142
The modelling of wave-structure interaction (WSI) has significant applications in understanding natural processes as well as securing the safety and efficiency of marine engineering. Based on the technique of Computational Fluid Dynamics (CFD) and th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ac888ac76866d43a23b2428b3f829c9f
https://doi.org/10.51560/ofj.v2.65
https://doi.org/10.51560/ofj.v2.65
Publikováno v:
Nonlinear Dynamics. 110:1081-1108
Parametric excitation in the pitch/roll degrees of freedom (DoFs) can induce dynamic instability in floating cylinder-type structures such as spar buoys, floating offshore wind or wave energy converters. At certain frequency and amplitude ranges of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e178409f6ceb4e564df151b75d4349d4
https://doi.org/10.1007/s11071-022-07710-1
https://doi.org/10.1007/s11071-022-07710-1
Publikováno v:
Acta Mechanica. 233:2351-2367
This study pertains to analysing the dynamical behaviour of a floating body undergoing parametric resonances. A simple vertical cylinder, representing a classical spar-buoy, is considered, limiting its motion to heave and pitch degrees of freedom. It
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7aaa76cd1f6131b71abe6d18a249aa0a
https://doi.org/10.1007/s00707-022-03225-3
https://doi.org/10.1007/s00707-022-03225-3
Autor:
Morten Bech Kramer, Jacob Andersen, Sarah Thomas, Flemming Buus Bendixen, Harry Bingham, Robert Read, Nikolaj Holk, Edward Ransley, Scott Brown, Yi-Hsiang Yu, Thanh Toan Tran, Josh Davidson, Csaba Horvath, Carl-Erik Janson, Kim Nielsen, Claes Eskilsson
Publikováno v:
Energies, Vol 14, Iss 2, p 269 (2021)
Highly accurate and precise heave decay tests on a sphere with a diameter of 300 mm were completed in a meticulously designed test setup in the wave basin in the Ocean and Coastal Engineering Laboratory at Aalborg University, Denmark. The tests were
Externí odkaz:
https://doaj.org/article/ea4ef6078f0844caa186b24bef6b03b1
Publikováno v:
Energies, Vol 14, Iss 1, p 26 (2020)
Reviewing the literature of CFD-based numerical wave tanks for wave energy applications, it can be observed that different flow conditions and different turbulence models are applied during numerical wave energy converter (WEC) experiments. No single
Externí odkaz:
https://doaj.org/article/5d0d13e1867c4a81baa1c1eb7ddf9f0b
Autor:
Josh Davidson, Tamás Kalmár-Nagy
Publikováno v:
Journal of Marine Science and Engineering, Vol 8, Iss 10, p 819 (2020)
Parametric resonance is a dynamic instability due to the internal transfer of energy between degrees of freedom. Parametric resonance is known to cause large unstable pitch and/or roll motions in floating bodies, and has been observed in wave energy
Externí odkaz:
https://doaj.org/article/77653fd42a8f4d6da3b946d2bca0afdf
Autor:
Giuseppe Giorgi, Josh Davidson, Giuseppe Habib, Giovanni Bracco, Giuliana Mattiazzo, Tamás Kalmár-Nagy
Publikováno v:
Journal of Marine Science and Engineering, Vol 8, Iss 7, p 504 (2020)
Mathematical models are essential for the design and control of offshore systems, to simulate the fluid–structure interactions and predict the motions and the structural loads. In the development and derivation of the models, simplifying assumption
Externí odkaz:
https://doaj.org/article/c806372203df49f2a6397dea5979d4ac