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The spacing and elevation of the rubber fenders are important
- Jul 23, 2018 -

The spacing and elevation of the rubber fenders are important. It is necessary to ensure that the ship does not directly hit the quay wall at the most unfavorable berthing angle allowed by the code, and should ensure that the ship can safely depend on different tide levels and different draughts. The mooring has strong adaptability to the docking of ships of different tonnages. When selecting and determining the layout plan for the first, second and third phases of the coal terminal, the stability conditions for the safe operation of different types of tonnage ships must be met. It actually reflects the requirements of the terminal for the degree of protection against waves. The fender is a ship's mooring energy-absorbing equipment. The size of the reaction force determines the three-dimensional space movement of the ship. The Qingang coal wharf with no cover and half-opening is affected by wind, waves and current, and the difference in the position of the pier. Under the influence of long-period waves. Both can produce a large ship impact on the pier energy, which requires the new fender to have good energy absorption characteristics. The cumulative frequency of wave height allowed before the dock is generally 4%. Foreign countries have adopted 3% of effective wave height. Because the factors affecting the wave height before the dock are more complicated, the collision energy of the ship against the pier, the transverse wave and the oblique wave must be calculated.

The allowable wave height and wind force in front of the wharf of the first, second and third phases of the coal terminal are based on the transverse wave H4=1.0m, the smooth wave 1. 5m, the wind ≤6 level 10. 8~13. 8m/s, the resulting hull pair The impact of the pier is protected by the fender to protect the structure of the wharf and the hull. According to the calculation of the rolling period of ships of different tonnages, the possibility of the ship striking the pier and the wave resonance should be avoided, and the wave height should be allowed to take a low value. The amount of deformation of the rubber fender and its corresponding reaction force. It reflects the wave height, wind power and allowable water flow conditions before the dock. The ship's flow pressure is related to the flow pressure angle. The current is close to the wharf. At this time, the cross-flow effect is small and the fender reaction force is small. However, the adverse effects of the wave on the ship's operation still exist, and the most unfavorable stress conditions of the fender. It is a combination of horizontal waves, high water levels and ship ballast conditions. 5至1. 5m. The coal wharf 35,000 to 50,000 DWT in the wave H = 1. 0 ~ 1. 5m. The cycle is 6 to 8 seconds, and the ship's lift is o. Around 5m, swaying in o. About 2m, rolling about 2 to 3 degrees, then the rubber fender should be able to withstand a certain amount of shear, but the maritime accident at the root of the inflatable port of Qinang is not uncommon. To this end, this paper discusses the following procedures: the representation of the ship type and its determination of the speed; the calculation of the effective landing energy of the ship type; and the calculation of the anti-shock equipment's reaction force to determine the type, arrangement and ancillary equipment of the anti-shock equipment.