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Wyszukujesz frazę "buoys" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Investigation into a hybrid mooring system with hydrodynamic response and mooring tension from a DeepCwind floating wind turbine
Autorzy:
Ganjgani, Arman Aghaei
Ghassemi, Hassan
Ghiasi, Mahmoud
Powiązania:
https://bibliotekanauki.pl/articles/24202541.pdf
Data publikacji:
2022
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
DeepCwind platform
BEM
buoys
clump weight
catenary mooring line
Opis:
This paper investigates the effect of buoys and a clump weight on the mooring lines and the dynamic response of the floating platform. The full-scale of the OC4-DeepCwind semisubmersible FOWT platform is analyzed using the boundary element method (BEM) with ANSYS-AQWA software, when considering regular wave conditions. Platform motions and mooring line tension in the surge, heave, and pitch are presented and discussed in the time domain analyses (TDA) and frequency domain analyses (FDA). Validation is performed by compression of the platform motion RAO and the fairlead tension RAO magnitudes in the surge, heave, and pitch (for both numerical and experimental data) under seven sea states’ regular waves. The results show that increasing the number of buoys at a constant volume decreases the surge and pitch motion amplitude, while the heave motion increases slightly. Adding the buoy and clump weight (type 1) to the mooring line reduces the oscillation amplitude tension. In addition, raising the number of buoys increases the oscillation tension.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2022, 71 (143); 11--21
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of changes in marine traffic flow due to installation of virtual buoys based on the OZT method
Autorzy:
Fukuda, G.
Tamaru, H.
Shoji, R.
Powiązania:
https://bibliotekanauki.pl/articles/1841472.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
virtual buoys
obstacle zone by target
risk of collisions
marine traffic
Opis:
In this study, changes in maritime traffic flow due to the installation of virtual buoys were analysed from the perspective of collision, based on the obstacle zone by target (OZT) method. The existence of an OZT within ±2° in the bow direction is considered to be dangerous; all the OZTs that a vessel encountered at the time when this orientation prevailed were subjected to analysis. For the calculation of the OZT model, an SD3 model was used. The estimated OZT was used to calculate the OZT density, and the positions of the ships that were encountering the OZT were used for the analysis. It was found that the OZT density at the locations where collisions had occurred in the past was approximately 0.01 [times/km2]. After the installation of virtual buoys, most places around there were reduced to around approximately 0.005 [times/km2]. The results imply that the installation of virtual buoys has reduced the risk of collisions. In contrast, the OZT density in the southern region of Buoy 1 increased from approximately 0.005 [times/km2] to approximately 0.01 [times/km2], suggesting that a more detailed analysis of this area is required.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2021, 15, 2; 445-454
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mooring area and mooring buoys plan
Autorzy:
Lušić, Z.
Pušić, D.
Powiązania:
https://bibliotekanauki.pl/articles/24201456.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
mooring area
mooring field
mooring buoy
anchorage
swing mooring
small vessels
swing radius
distance between mooring buoys
Opis:
Developing tourism and growing number of tourist and other smaller vessels and personal boats require a larger number of berths, outside dedicated ports, and harbours. Vessels can always anchor, but for ecological, and commercial reasons mooring areas with installed mooring buoys are better and more efficient solutions. However, choosing mooring areas, their size, number of buoys, etc. compared to choosing anchorage areas, is a much more complicated procedure, even more so for not having a unified form nor practice. This paper analyses some of the main issues in the selection of mooring sites and fields, focusing on the factors that should be considered in the planning process. As a result of the carried-out analysis some basic recommendations will be given concerning the choice of mooring field shape, swing radius calculation, distance from the shore, nearby vessels, and other obstacles.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2023, 17, 1; 147--155
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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