Cargo hold structure

Abstract

The invention discloses a cargo hold structure which comprises a bottom side tank inclined bottom plate (1), an inner bottom plate (2) and an inner bottom side stringer (3), wherein the lower portion of the inner bottom side stringer (3) is vertically supported. The inclined bottom plate (1) and the inner bottom plate (2) are connected through a board and by utilizing of a bent arc transition mode. The inner bottom side stringer (3) is supported below a knuckle line (7) formed by intersecting of extension planes of the inclined bottom plate (1) and the inner bottom plate (2). The cargo hold structure is especially suitable for an oil tanker cargo hold. A three-line centering and arc transition type connection structure of the bottom side tank inclined bottom plate and the inner bottom plate is mainly designed. According to the cargo hold structure, welding and polishing work load is effectively reduced. Fatigue resistance is effectively improved, at the same time, constructing and machining processes are simplified, work efficiency is improved, and the cargo hold structure has the advantages of being low in cost and high in strength.

Description

Technical field [0001] The invention relates to a cargo hold, and more specifically, to the structural improvement of the joint between the longitudinal inclined bottom plate and the inner bottom plate of the cargo hold of an oil tanker. Background technique [0002] Such as figure 1 As shown, there is a structural schematic diagram of a direct aligning connection between the inclined bottom plate and the inner bottom plate of a cargo hold in the prior art. In the figure, the number 1 is the inclined bottom plate, the number 2 is the inner bottom plate, and the number 3 is the inner bottom side longitudinal stringer. Although this structure has good fatigue resistance, it has the problem of difficulty in welding and polishing. [0003] A kind of arc connection structure of cargo hold inclined bottom plate and inner bottom plate such as Figure 2-3 Shown. In the figure, the number 1 is the inclined bottom plate, the number 2 is the inner bottom plate, the number 3 is the inner bot...

AI Technical Summary

Problems solved by technology

Although this structure has no grinding problem, it has insufficient fatigue strength, and it is necessary to add a longitudinal reinforcement structure at the upper end of the arc to meet the fatigue strength requirements.

Figure 2-3 In the design shown, the forces in the three directions of the inner bottom plate, the sloping bottom plate and the side girders do not converge into one point, so additional bending moments will be generated around the arc, which will greatly increase the stress of the arc.

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