Storage box with large-concentrated-force integrated diffusion structure

Abstract

The invention provides a storage box with a large-concentrated-force integrated diffusion structure. The storage box comprises a wave distribution radial short shell, a reinforced bending-resistant Y-shaped ring and a triangular grid radial barrel segment. The middle of a wave-shaped base of the wave distribution radial short shell is a wave-shaped structure with the middle being sunken and the two sides being protruded, and the two sides of the wave-shaped base are conventional arc bases. Component force of all radial diagonal ribs in the action direction of the concentrated force is the same. Trapezoid transition ring ribs are located on transition regions of the radial diagonal ribs and uniform grids, and the uniform grids are located on the two sides of a radial rib region. The outer surface of the reinforced bending-resistant Y-shaped ring is provided with a plurality of reinforced grids, and the inner surface of the Y-shaped ring is additionally provided with an arc bending-resistant groove. The triangular grid radial barrel segment is formed by welding four identical radial triangular grid wall plates. By means of the storage box, pressure stress on a concentrated load action line can be effectively lowered, and influences of the concentrated load on an internal pressure thin wall oxygen tank are weakened through matching and coordination of all structures and step-by-step diffusion.

Description

technical field [0001] The invention relates to a thin-wall structure of a low-temperature storage tank for a liquid carrier rocket, especially a structure designed to withstand the coupled action of kiloton-level bundled concentrated force and axial internal pressure load, and has special requirements for diffusion efficiency, and belongs to the technology of aerospace storage tanks field. Background technique [0002] As the main structure of the launch vehicle, the thin-walled tank not only bears the internal pressure, but also transmits various flight loads of the rocket. For high-thrust bundled rockets, the core-stage rocket body bears a huge concentrated load near the bundled point, the magnitude of which reaches the kiloton level, and there is a certain eccentricity between the load point and the core-stage shell wall, so that the core-stage shell bears a large load. Additional bending moment. At the same time, the core-level thin-walled storage tank itself also bea...

AI Technical Summary

Problems solved by technology

However, for a thin-walled storage tank that is subjected to a thousand-ton concentrated load, the diffusion efficiency of the tank structure must be at least 70% to ensure that the structure does not buckle, while the traditional diffusion efficiency is only 20%, which cannot meet the requirements of use.

[0004] The traditional structure also has the following disadvantages: (1) The structure of the diffusion joint is heavy, and there are many internal defects in the forging; in order to ensure the flatness of the butt joint, special tooling is required when riveting with the short shell wall; (2) most of the concentrated The force is still borne by the middle rib, and the diffusion efficiency of the radial rib (that is, the uniformity of the internal stress in the cross-section) is poor, only about 10%, and the structure is easy to enter plasticity and fail early; When the low-temperature propellant is injected and subjected to internal pressure, it will have a restraining effect on the outward expansion tank section, which will increase the bending stress at the butt weld of the two; (4) the axial compression resistance of the bare cylinder shell type box section is relatively low. Poor, prone to instability under concentrated force

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