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With the development of the world shipping market, oil, bulk cargo, container traffic has increased year by year, is very obvious in recent years the trend of large ships, new large terminals is increasing year by year, these factors will have anchorage setting and planning greater demands. Due to the Anchorage water depth is to determine the key factors anchorage for ship use, it is necessary to Anchorage water depth research, so as to provide theoretical support for the safety of the set as well as ships in the anchorage anchorage. This paper first analyzes the influencing factors of the anchorage depth, these factors include the ship's draft, the ship trim and heel, static keel sounding error as well as the amount of wind and waves caused the ship to sink. Separate analysis of these factors, we can know the ship's draft, trim and heel, static keel sounding error are usually specific value, so it is not difficult to see, the calculation of the anchorage depth depends mainly on the storm The ship sinks Calculation. Belonging to a ship at anchor in the sinking of the ship in the storm, fluid mechanics areas, mainly the use of three-dimensional potential flow theory studies the movement of ships in waves, the ship is to arrive at the range of motion of the waves. Amount of computational theory of the ship sinking in the storm in Chapter III of this paper described in detail, we see the ship in waves in the equation of motion is quite complex, three-dimensional potential flow theory-based computer software has been more and more, so that you can by way of computer simulation analysis of the movement of the ship in the storm. This selection of the the ship hydrodynamics DNV SESAM software, and use of this software choice of different displacement oil tankers, container ships and bulk carriers 5 each simulation, came to the conclusion that water depth draft were 1.3 , 1.5,1.6,1.8,2.0 different significant wave (2.5m, 3.5m, 4.5m, 5.5m, 7.0m) ship the vertical motions draft magnification with the displacement graph showing the change. Draft of the different displacement vertical movement of the ship in the curve ratio statistics, you can come to different ship ship the significant wave height of 2.5 meters, the maximum value of the vertical motion Draught magnification, which launched anchorage depth formula. According to these formulas, we can determine the security of large ships at anchor in the anchorage, and can also provide reference for the setting and planning of the anchorage.
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