A Stowage Method for Improving the Stability of Container Ships and the Operational Efficiency of Quay Cranes

Abstract

The invention provides a stowage method for improving the stability of a container ship and the operating efficiency of a quay bridge. Firstly determine the number of containers to be shipped out, container size, container weight, number of container slots and the arrival station of the container; secondly determine the decision variables of the stacked container slots for each container; then establish the stability of the ship and the operation of the quay bridge The objective function of efficiency and its constraints; use the heuristic algorithm to pre-allocate the container space; and then further determine the specific container space for each container, and load the container on the ship. The stowage method of the present invention is proposed for the problem that it is difficult to take into account the best stability and the minimum number of unloaded containers in the stowage plan, and the time-consuming problem of the formulation process. It fully considers the ship performance, ship structure, Constraints such as container size and port operations are aimed at minimizing the deviation of ship stability and the number of container dumping operations during unloading operations, so as to obtain the results of container location allocation.

Description

technical field [0001] The invention belongs to the technical field of container wharves, and relates to a stowage method for improving the stability of container ships and the operating efficiency of quay bridges. Background technique [0002] A container is a large box of standard size and strength intended for use in shipping operations. Container transportation overcomes the shortcomings of many loading and unloading links and low loading and unloading efficiency in traditional transportation methods, and is a highly efficient transportation method. In 2009, containers undertook a quarter of the world's dry cargo transportation, about 125,000,000TEUs (Twenty-foot Equivalent Units, a standard container box). As a buffer place for container cargo when changing modes of transportation and a transfer station for land and water transport, container terminals occupy a pivotal position in the entire container transportation process. As containerized transportation has become ...

AI Technical Summary

Problems solved by technology

However, it is difficult to take into account safety objectives, economic objectives and structural constraints when formulating a stowage plan manually, and it often takes a lot of time (a highly skilled planner at a domestic container terminal used the terminal information management system to formulate The stowage plan of a 300TEUs ship takes 30 minutes) and is prone to omissions and mistakes

Because it takes a long time to make plans manually, the actual loading plan is not real-time. The planner must complete the plan before the container ship berths, and the scene often occurs after the ship berths due to the absence of containers, residual containers or customer needs. Box dumping, replenishment or replacement of boxes caused by other reasons

When the number of change boxes is small, the planner can manually adjust the stowage plan based on the prepared one. When the number of change boxes is large, the planner must spend a lot of time re-establishing the stowage plan, which will cause On-site operation machinery waits, thus increasing the service time of the ship

At the same time, a low-quality stowage plan will lead to excessive stability deviation during the loading and unloading process of the ship and even pose a threat to the safe navigation of the ship, or cause a large number of accidents when the ship is loading and unloading at the subsequent port of call. The container dumping operation seriously affects the operating efficiency of the wharf quay crane machinery, prolongs the service time of the ship in the port, and thus brings huge logistics operation costs

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