Cargo allocation method for improving quay crane operation efficiency and vessel stability of containers

Abstract

The invention provides a cargo allocation method for improving quay crane operation efficiency and ship stability for containers. First, the quantity, size and weight of containers for shipment and departure, the quantity of the ship container positions and the destination port of the containers are determined; then, the decision variable of the ship container position for stacking each container is determined; an objective function of the ship stability and the constraint condition of the quay crane operation efficiency and the ship stability are established; the ship container positions are distributed in advance by utilizing a heuristic algorithm; the ship container position specifically for stacking each container is further determined, and the containers are loaded on a ship and allocated. The cargo allocation method is provided for solving the problems that the optimal stability and the least container loading and unloading frequency are difficult to be both considered according to an allocation schedule and long time is consumed in the making process, the constraint conditions needing to be met by making the cargo allocation schedule are fully considered, wherein the constraint conditions include ship performance, a ship structure, container types and sizes, port operation and the like. A container position distribution result is obtained with the aim of minimizing the ship stability deviation and the loading and unloading operation frequency in the ship unloading operation process.

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 accounted for a quarter of the world's dry cargo transportation, about 125,000,000TEUs (Twenty-foot Equivalent Units, that is, 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 transportatio...

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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