http://www.cnr.it/ontology/cnr/individuo/prodotto/ID288851
Roll-yaw Coupling Effects on Parametric Resonance for a Ship in Regular Waves (Contributo in atti di convegno)
- Type
- Label
- Roll-yaw Coupling Effects on Parametric Resonance for a Ship in Regular Waves (Contributo in atti di convegno) (literal)
- Anno
- 2014-01-01T00:00:00+01:00 (literal)
- Alternative label
Greco M. 1,2; Lugni C. 1,2; Faltinsen O.M. 2 (2014)
Roll-yaw Coupling Effects on Parametric Resonance for a Ship in Regular Waves
in 29th International Workshop on Water Waves and Floating Bodies, Osaka, Japan, 30 March-2 April 2014
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Greco M. 1,2; Lugni C. 1,2; Faltinsen O.M. 2 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
- Note
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- 1 CNR-INSEAN, Italian Ship Model Basin, Roma - Italy.
2 Centre for Autonomous Marine Operations and Systems (AMOS),
Department of Marine Technology, NTNU, Trondheim - Norway (literal)
- Titolo
- Roll-yaw Coupling Effects on Parametric Resonance for a Ship in Regular Waves (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#isbn
- 978-4-907621-00-1 (literal)
- Abstract
- This work represents a further step of the physical study documented by Greco and Lugni (2012b) and Greco et al. (2014).
Three-dimensional experiments have been performed on a FPSO model in regular waves to investigate the occurrence of parametric roll, the occurrence and features of water on deck and bottom slamming and the sensitivity of the mid-ship bending moment experienced by the vessel to the different operational conditions examined. The model tests provide also a certified database for the validation of the simplified Domain-Decomposition (DD) solver developed for the prediction of the ships behavior, in regular and long-crested irregular waves and with and without forward speed, documented in detail by Greco and Lugni (2012a). The DD couples a weak-scatterer potential-flow solver for the seakeeping problem
with a shallow-water approximation for the water flow on the deck, when water shipping occurs, and with a Wagner-type impact solution, in case of bottom impact. The latter needs a proper criterion, this compound method combines the Ochi's criterion based on the impact velocity with a pressure criterion proposed by Greco and Lugni (2012a) and validated in many incident-wave cases by Greco et al. (2012).
In the previous steps, head-sea conditions, i.e. ? = 180o, were investigated. Here the cases with ? = 175o
are considered with focus on parametric roll. The comparison between experimental and numerical wave-body interactions, and a subsequent in-depth analysis of the model tests, highlighted some important insights of parametric roll in connection with roll coupling with yaw. These aspects are examined in the following after a brief description of the model tests for the conditions and variables of interest. (literal)
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