Wyniki wyszukiwania - BazTech

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Facilitating optimal operations of a wave energy converter using a preeminent mooring line: an entropy weight-VIKOR method

Nwaoha Thaddeus C., Udosoh Nsisong E.

Journal of Mechanical and Energy Engineering

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2022

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Vol. 6, No 1

77--83

EN

This study employed viable methods for the selection of a preeminent mooring line amongst other alternatives for the mooring of a floating wave energy converter (WEC) in shallow waters. Conventional mooring lines for WEC mooring are identified for an optimal selection exercise. A combination of the Entropy Weight and Visekriterijumska Optimizacijia I Kompromisno Resenje (VIKOR) methods is utilized in the aforementioned exercise. The two methods are effectively used in an assessment of the attributes and performance of various mooring lines in practical application. The result obtained demonstrated that a steel wire rope is the best mooring line suitable for WEC system operations. It constitutes a good reference to marine and offshore engineering industries in decision making related to optimal mooring lines suitable for the mooring of a WEC system in shallow waters.

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Definition of mooring plans for vessels at port terminals using physical models

Bernardino J.C.M, Pion L.M., Esferra R., de Oliveira Bezerra R.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

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2019

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Vol. 13, no. 1

107--114

EN

Physical scale models have a large range of application in studies of hydraulic works. In port engineering, they can be used to optimize the general layout of terminals, evaluation of protection structures, simulation of vessel maneuvers and investigation of mooring plans for vessels, among several subjects. Once physical modeling allows a high accuracy in the waves and currents representation as well as their interaction with the bottom and the vessels, the studies of mooring systems in coastal and estuarine ports based on physical modeling tests provide greater reliability in comparison with those grounded on distinct types of models. To highlight the importance of this kind of application, this article presents the case study of the Ponta da Madeira Port (PMP), located in the State of Maranhao, Brazil, developed with the support of the 1:170 scale reduced physical model conceived and calibrated for this area. This study analyzed several alternatives to improve the availability of the northern berth of the Pier III of PMP, including new mooring strategies and the construction of a new improvement structure. The results, which concerned on preliminary tests of the mooring lines tensions, evidenced structural intervention could substantially reduce the risk of mooring lines break, indicating that further investigations concerning different layouts for the improvement structure are promising in order to provide an increase of this berth availability.

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Wpływ wiatru, prądu i falowania na bazpieczeństwo cumowania zbiornikowca w terminalu

Soliwoda J., Wilczyński P.

Zeszyty Naukowe Akademii Morskiej w Gdyni

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2017

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nr 102

80--95

PL

W artykule przedstawiono wpływ oddziaływania wiatru i prądu na zacumowany zbiornikowiec oraz reakcje lin cumowniczych na ruch statku, wywołany falowaniem wewnątrz portu. Podczas operacji ładunkowych zmienia się powierzchnia oddziaływania wiatru na statek, podwodna powierzchnia kadłuba statku wystawiona na działanie prądu, a także wartość wysokości metacentrycznej, które mają znaczący wpływ na wytrzymałość lin i urządzeń cumowniczych statku.

EN

Paper present influence of the wind and current on mooring tanker and the reaction of mooring lines on the ship movement in port caused by waves. During cargo operations dynamically change windage area, submerged part of tankers and also metacentric height, which have great impact on the strength in mooring lines and ship’s equipment.