Aggregate through hole pattern structure of ship cabin wall plate

Abstract

The invention discloses an aggregate through hole pattern structure of a ship cabin wall plate. The structure comprises horizontal straight lines positioned on two sides of an opening of a through hole; the end part of the straight line on the left side is connected with a first arc line; the upper end of the first arc line is connected with a second arc line; the upper end of the second arc line is connected with an upper semicircle; the right lower end of the upper semicircle is connected with a third arc; the lower end of the third arc is connected with a fourth arc; the other end of the fourth arc is connected with the straight line on the right side of the opening of the through hole; and the through hole is an asymmetric hole. Aiming at an asymmetric aggregate for a ship, the hole edge stress concentration coefficient is reduced, and the ship fatigue strength is improved; and for frequent generation of cracks at a weld toe root part of a reinforcing material, the new design frequently adopts a reinforcing material removing method, but the rise of hole edge stress can be caused. The hole pattern can reduce stress concentration points when reducing the stress concentration coefficients to meetthe new design requirements so as to reduce fatigue sources; and compared with a novel hole pattern, the hole pattern is easily positioned, and is convenient for machining.

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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