Ultra-large ship block hoisting design method

Abstract

The invention provides an ultra-large ship block hoisting design method, and belongs to the technical field of ship manufacturing. A gantry crane 1 and a gantry crane 2 are arranged on the two sides of the gravity center of a block respectively, each gantry crane is provided with three lifting hooks, each lifting hook is connected and fixed to a plurality of lifting lugs on the block, and the centers of the lifting lugs are hoisting points; the load-bearing values of six lifting hooks of two gantry cranes are calculated through two different methods respectively, the lifting hook corresponding to each lifting point obtains a large load-bearing value and a small load-bearing value, the specification of a lifting lug corresponding to each lifting hook is selected according to the large load-bearing value, and the number of the lifting lugs is calculated according to the specification of the lifting lugs. The six-point hoisting block lifting lug and the corresponding subsection hoisting lifting lug designed by the method can be mutually universal, so that the repeated use frequency of the lifting lugs is increased; the covering range of the lifting lugs is enlarged, the problem of stress concentration of large block lifting is effectively solved, and meanwhile lifting deformation is controlled.

Description

technical field [0001] The invention belongs to the technical field of shipbuilding, and in particular relates to a hoisting design method for a super-large ship general section. Background technique [0002] In the process of ship construction, it is necessary to carry out the subsection of the general assembly. After the construction of each corresponding subsection is completed, it will be transported to the 600T gantry crane for the general assembly after being painted in the workshop to form a complete general section. For the general general section, three-point hoisting is usually adopted, and the center of gravity of the general section is located in the triangular centroid area formed by the three lifting points during design, and a 600T gantry crane is used for lifting with three hooks. However, there is currently no systematic and scientific method for calculating the statically indeterminate load-bearing of two-car cranes with more than three points. In productio...

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Problems solved by technology

[0003] In the field of statics, the load-bearing calculations of more than 3 points belong to the category of hyperstatic definiteness, and there are multiple solutions for the arrangement of superstatic lifting lugs and the load-bearing of each lifting point. The previous calculation methods did not fully consider the double-vehicle crane in the actual production process. state, the influence of the distance between the hoisting point and the center of gravity of the general section on the load-bearing of the hoisting point has not been considered, so in the actual hoisting process, the load-bearing capacity of the hook near the center of gravity exceeds the design value, and there are potential safety hazards in hoisting

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