Hatch coaming with overall strength completely reckoned in and hatch longitudinal girder of bulk cargo ship

Abstract

The invention discloses a hatch coaming with the overall strength completely reckoned in and hatch longitudinal girder of a bulk cargo ship. The hatch coaming with the overall strength completely reckoned in and hatch longitudinal girder of the bulk cargo ship comprise a longitudinal hatch coaming body and a hatch longitudinal girder body. The longitudinal hatch coaming body is continuous in the length direction of the ship, the material elasticity yield limit of the longitudinal hatch coaming body is increased by 16% relative to that of a main deck, and the height of the longitudinal hatch coaming body is reduced to 600 mm or below at an athwartship bulkhead; the height of the hatch longitudinal girder body is smaller than that of a traditional hatch longitudinal girder. By means of the hatch coaming with the overall strength completely reckoned in and hatch longitudinal girder of the bulk cargo ship, the rigidity of a ship girder structure can be improved, the fatigue life of a hatch corner is prolonged, the capacity of a cargo hold is increased, and the structural weight of a longitudinal member in the cargo hold area is averagely reduced by 3% or above.

Description

technical field [0001] The invention relates to the technical field of hatch coaming, in particular to a bulk carrier hatch coaming and a ship's girder. Background technique [0002] The longitudinal hatch coamings of traditional bulk carriers are generally designed as a discontinuous structural type, and the total longitudinal strength of the hull girder cannot be included in the calculation of the rules. The reality is that the hatch coamings contribute a small part to the overall strength, which is too conservative compared to reality for the main hull structure and dangerous for the hatch coamings themselves. In addition, the height of the hatch girders of traditional small and medium-sized bulk carriers is generally too high, which causes the entire topside tank sloping plate to be slightly closer to the neutral axis, and at the same time loses part of the cargo hold volume. Contents of the invention [0003] In view of the above-mentioned problems, the object of the...

AI Technical Summary

Problems solved by technology

[0002] The longitudinal hatch coamings of traditional bulk carriers are generally designed as a discontinuous structure, and the total longitudinal strength of the hull girder cannot be included in the calculation of the rules

The reality is that the hatch coamings have a small part to contribute to the overall strength, which is too conservative for the main hull structure compared to reality, and dangerous for the hatch coamings themselves

In addition, the height of the hatch girders of traditional small and medium-sized bulk carriers is generally too high, resulting in the entire topside tank sloping plate being slightly closer to the neutral axis, and at the same time losing part of the cargo hold volume

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