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Critical path method for starting number of portal cranes in container yard

A technology for gantry cranes and containers, which is used in transportation and packaging, trolley cranes, cranes, etc., can solve the problems of increasing computational complexity and difficulty in promotion.

Inactive Publication Date: 2010-07-28
SHANGHAI MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the methods disclosed in some achievements can be used to calculate the quantity theoretically through transformation, the complexity of the calculation increases exponentially due to the increase in the number of container loading and unloading tasks, and it is difficult to promote in practical applications

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  • Critical path method for starting number of portal cranes in container yard
  • Critical path method for starting number of portal cranes in container yard
  • Critical path method for starting number of portal cranes in container yard

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Embodiment Construction

[0100] Attached below figure 1 The method disclosed in the present invention will be described.

[0101] The goal of this method is to calculate the configuration of gantry cranes. The typical application scenario is how to determine the number of gantry cranes to start when making a 24-hour berthing plan and stowage plan, so as to reduce the energy consumption of gantry cranes. The input of this method is the berthing plan and the stowage plan, especially the operation task sequence of the operation line. First of all, the operation lines of all ships are processed as parallel machines, and the task sequence of each operation line is processed independently. According to the assumption that the bridge crane is fully utilized, the start time of each task is calculated, and then the start time of the truck in the yard is calculated. Then calculate the starting time for the gantry crane to perform the task. Then, discretize the time. Conversely, it is possible to determine th...

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Abstract

The invention discloses a critical path method for the starting number of portal cranes in a container yard, and relates to the technical field of quay management and yard management. The method of the invention comprises the following steps: decomposing ship handling tasks to parallel task operating lines, to a Bay bit sequence and then to a Bay bit container handling task sequence by utilizing a berthing plan and a cargo plan; according to the starting time of the bridge crane of a cabin handling task, calculating the starting time of lorries and the starting time of the portal cranes; after time discretization, inversely calculating the number of the parallel yard container handling tasks of any event; and after summing up to a Bay bit and continuous Bay bit cluster, deducing the number of the portal cranes in parallel operation at random time; and further calculating the starting number of the portal cranes by statistical criteria. The method does not relates to complicated models and algorithms, can adapt to predict the starting number of the portal cranes on a large quay, and is favorable for realizing the object of energy saving and full use of the bridge cranes and the portal cranes.

Description

technical field [0001] The invention relates to the technical field of management of container terminal yards, in particular to the technical field of starting quantity configuration of gantry cranes in container terminal yards. Background technique [0002] Container terminals generally formulate berthing plans with a gradually narrowing cycle and accurate ship berthing plans based on the ship's arrival time and operating data, such as berthing plans 4 days, 2 days and 1 day in advance respectively. Generally, the 24-hour berthing plan is very accurate, and related operating resources can be arranged accordingly, including bridge cranes, trucks, gantry cranes, and related operating personnel. From the perspective of equipment configuration, the costs of bridge cranes, trucks and gantry cranes are very different, and the costs of the three are decreasing rapidly in turn. Therefore, in the process of wharf operations, the full utilization of bridge cranes is emphasized to im...

Claims

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Application Information

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IPC IPC(8): B66C19/00
Inventor 胡志华
Owner SHANGHAI MARITIME UNIVERSITY
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