Structure of through-hole holes in ship bulkheads

Abstract

The invention discloses a structure of a through-hole for a ship's bulkhead, which comprises horizontal straight lines on both sides of the opening of the through-hole. The second arc, the upper end of the second arc is connected to the upper half of the waist, the lower right end of the upper half of the waist is connected to the third arc, the lower end of the third arc is connected to the fourth arc, and the other end of the fourth arc is connected to the second arc. Straight line connection on the right side of the opening of the through hole, the through hole is an asymmetric hole. For marine asymmetrical frames, reduce the stress concentration factor at the edge of the hole and increase the fatigue strength of the ship; for cracks that often appear at the root of the weld toe of the stiffener, the new design often adopts the method of removing the stiffener, but the stress at the edge of the hole will increase . Adopting this pass type can reduce the stress concentration point while reducing the stress concentration factor, so as to meet the requirements of the new design, thereby reducing the source of fatigue; the pass type is easier to locate and process than the existing new pass type.

Description

technical field [0001] The invention relates to the technical field of ships, in particular to a through-hole structure for aggregates of ship bulkhead plates. Background technique [0002] In order to ensure the continuity of the longitudinal members in the ship, it is necessary to drill holes in the transverse members. This type of opening has the characteristics of large number and complicated process. Traditional hull structure openings mainly include round, elliptical, and waist-round hole types, and the stress concentration at the edges of traditional openings is relatively high. With the development trend of large-scale and super-large ships, the existing pass patterns can no longer meet the development needs of future ship structures. [0003] For this kind of aggregate through-hole, it is mainly subjected to the force transmitted by the weld between the connecting longitudinal frame and the transverse frame, as well as the in-plane force caused by external loads s...

AI Technical Summary

Problems solved by technology

However, only the optimized design of the through hole of the T-shaped bar is used. Since the T-shaped bar is a symmetrical structure, the opening pattern designed to pass through the bulkhead plate is also left-right symmetrical. Open hole pattern not studied

However, if the new-style T-shaped bar frame slotting hole pattern is directly used on the flat bulb steel, this type of hole pattern fails to fully consider the asymmetric characteristics of the flat bulb steel, and there are relatively high stress and too many high-stress concentration points. features

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