Ship bottom structure and fatigue life computing method thereof

Abstract

The invention relates to the field of ships, and particularly discloses a ship bottom structure and a fatigue life computing method thereof. The ship bottom structure comprises an inner bottom longitudinal bone, an outer bottom longitudinal bone, a reinforcing rib and a rib plate, wherein the outer bottom longitudinal bone is parallel to the inner bottom longitudinal bone, the reinforcing rib is connected with the inner bottom longitudinal bone and the outer bottom longitudinal bone, and the rib plate is connected to one side of the reinforcing rib; and the two ends, in the height direction, of the rib plate are connected to the inner bottom longitudinal bone and the outer bottom longitudinal bone correspondingly, and the rib plate is a flat plate. According to the ship bottom structure, the rib plate is the flat plate, compared with a rib plate structure in the prior art, the rib plate in the ship bottom structure does not need to be provided with a toggle plate, the rigid requirement for the inner bottom longitudinal bone and the outer bottom longitudinal bone of the ship bottom structure can be met by adopting the rib plate, the weight of the structure is lowered, the structural form is simplified, the welding workload is reduced greatly, the construction efficiency is improved, and meanwhile, due to the fact that the toggle plate does not need to be arranged, the weight of a ship is lowered, and the production cost of the ship bottom structure is further saved.

Description

technical field [0001] The invention relates to the field of ships, in particular to a ship bottom structure and a fatigue life calculation method thereof. Background technique [0002] Double-decker heavy-duty ships, such as 82,000-ton bulk cargo ships, such as figure 1 and figure 2 As shown, the inner bottom longitudinal 101 and the outer bottom longitudinal 102 of the bottom structure of the ship are connected by a rib 105, and one side of the rib 105 is provided with a rib 103, and the height direction of the rib 103 ( figure 1 The two ends of the H direction shown in ) are respectively connected with the inner bottom longitudinal 101 and the outer bottom longitudinal 102, and the height direction of the side of the rib 103 away from the rib 105 ( figure 1 Brackets 104 are respectively connected to the two ends of the H direction shown in ), and the brackets 104 at the corresponding ends are respectively connected to the inner bottom longitudinal 101 and the outer bot...

AI Technical Summary

Problems solved by technology

[0004] When using the above method to calculate the fatigue life, because the nominal stress is used to calculate the fatigue life of the joints between the stiffener 105 and the outer bottom longitudinal 102 and the joint between the stiffener 105 and the inner bottom longitudinal 101, the calculation structure is often conservative, which makes the fatigue The life margin is too large, which in turn leads to an increase in the weight of the ship structure and waste of raw materials

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