Wyniki wyszukiwania - BazTech

Ograniczanie wyników

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

Znaleziono wyników: 3

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: sea wave

Sortuj według:

Ogranicz wyniki do:

Waves, currents and seabed level change in the Port of Gdynia during extreme events

Sapiega P., Zalewska T., Wochna A.

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

2023

Vol. 17 No. 3

515--521

The primary purpose of the paper is to identify port areas most exposed to extreme hydrodynamic conditions (waves, sea currents, seabed level change). The results of modelling using SWAN wave model, MIKE 3D model, and reanalysis and measurement data were used in paper. Swell may exceed 0.8 m for winds exceeding 15 m s-1 from the west and south. During extreme conditions, sea currents can reach 0.4 ms-1 in the outer part of the bay adjacent to the port. Port basins do not show changes in the thickness of the seabed for the given maximum values of bottom currents. The most extensive deposition of the seabed and shore sediments (up to 0.04 m) is found on the Gdynia-Oksywie beach adjacent to the port and the approach fairway at the offshore currents. The outer area of the main breakwater is the most exposed to erosive activity (-0.012 m).

Numerical Analysis for the Dynamic Forces and Operational Risk Accomplished for a “Hiload DP1” Unit Docked to MT “Navion Anglia” at Sea Waves

Rutkowski G.

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

2014

Vol. 8 no. 4

505--512

In this paper author depicts the results of the sea trials of the operational test of a Hiload technology at sea waves with the numerical analysis for the dynamic forces and operational risk. The research was carried out on board MT “Navion Anglia” which was engaged in a towing operation through the Atlantic Ocean with a “Hiload DP1” prototype unit docked on her portside alongside, with different ship’s draft and in different weather conditions. Additionally in this paper author presents the methods that can be used for estimating the safety factor SF against sliding and/or operational risk for the towing and/or manoeuvring operation with a “Hiload DP1” unit docked alongside at the open sea.

A numerical prediction system for wind and sea wave: a typhoon case

Chen J.-M., Hu J.-S., Huang W.-L., Hsu L.-H.

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

2007

Vol. 1, no. 3

279--282

A numerical model system is constructed to predict surface conditions over the open oceans for a typhoon case. Its atmospheric and oceanic components are the Weather Research and Forecasting (WRF) model and the NOAA WaveWatch version 3 (NWW3) model, respectively. The initial condition of the WRF is obtained from the NCEP aviation forecast, while the WRF-predicted surface winds serve as the boundary conditions for sea wave prediction of the NWW3.The capability of this model system is evaluated in terms of the predictions of surface wind and sea waves associated with the typhoon Bilis (No. 0604). This typhoon formed over the west side of Guam (141?E, 12?N) on July, 9, 2006, and moved northwestward across Taiwan to decay over southeast China on July, 15, 2006. Its moving track is reasonably predicted by the WRF with an averaged error of 99 km in 24-hr forecast and of 233 km in 48-hr forecast. These errors are in comparable ranges with the official typhoon forecasts conducted by weather services in the countries around the Pacific. The circulation pattern and intensity of surface winds and height of sea waves can be adequately portrayed by this prediction system in advance by 48 hrs. The dangerous and navigable semicircles of the typhoon are also clearly delineated. As such, the spatial domains of high wind and high sea are identified, providing potentially useful information for navigation safety.