PIANC Smart Rivers 2022

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Abstract : *(250~1000 words)

Based on the experimental physical model of the shipping capacity expansion project of a giant ship lock in China, the force model and motion model of the ship under the action of water flow and cable are established when the miter gate is opened under the condition of water level difference between inside and outside the lock chamber. Based on the theory, the variation law of the water level and the flow rate of the gate chamber during the process of miter gate moving water opening is given, the velocity distribution of the section of the gate chamber is analyzed, the dynamic characteristics of the gate chamber flow under the influence of water transfer and flow resistance around the gate is discussed, and the motion balance equation of the ship with miter gate moving water opening is established. The main and secondary influencing factors of mooring cable force were analyzed, and representative influencing factors such as water level difference between inside and outside the gate chamber, ship displacement, gate opening rate and threshold water depth were used to comprehensively characterize the change rule of mooring force of ship with miter gate opening under the condition of water level difference between the gate chamber. This paper summarizes the influence mechanism of hydrodynamic characteristics on ship mooring force, the change law of lock chamber ship mooring force and the law of ship motion response, and summarizes the comprehensive calculation formula of ship mooring force. Based on the formula of mooring force, this paper discusses the control standard of opening and closing speed and water level difference of miter gate to ensure the mooring safety of ship in the lock chamber, and gives the safety control standard of ship in the lock chamber.

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