The spacing and elevation of the rubber fenders are important. It is necessary to ensure that the ship does not directly touch 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.