阅读说明：本技术 网格加强筋柱壳、具有其的运载火箭及其加工方法 (Grid reinforcing rib column shell, carrier rocket with grid reinforcing rib column shell and machining method of carrier rocket ) 是由 周焕林 孟增 荣运高 李孝宝 于 2019-09-16 设计创作，主要内容包括：本发明公开了一种网格加强筋柱壳,包括柱壳本体和网格加强筋,柱壳本体具有内周面；网格加强筋布置在整个内周面上,网格加强筋的筋体截面在柱壳本体轴向方向上由两端向中部逐渐增大。本发明的网格加强筋柱壳承载能力高、加工工艺简单、能够使柱壳实现轻量化设计且适合进行大规模量产。(The invention discloses a grid reinforcing rib column shell, which comprises a column shell body and grid reinforcing ribs, wherein the column shell body is provided with an inner peripheral surface; the grid reinforcing ribs are arranged on the whole inner circumferential surface, and the rib body sections of the grid reinforcing ribs are gradually increased from two ends to the middle in the axial direction of the column shell body. The grid reinforcing rib column shell has high bearing capacity and simple processing technology, can realize light weight design of the column shell, and is suitable for large-scale mass production.)

1. A lattice stiffener column casing, comprising:

a column shell body having an inner circumferential surface;

the grid reinforcing ribs are arranged on the whole inner circumferential surface, and the rib body sections of the grid reinforcing ribs are gradually increased from two ends to the middle in the axial direction of the column shell body.

2. The grid reinforcement column shell of claim 1, wherein the grid reinforcement comprises a first plurality of reinforcement ribs arranged in a first direction and a second plurality of reinforcement ribs arranged in a second direction, the first plurality of reinforcement ribs intersecting the second plurality of reinforcement ribs to form the grid; the widths of the first reinforcing ribs at different positions are the same, and the heights of the first reinforcing ribs are gradually increased from two ends to the middle part in the axial direction of the cylindrical shell body and are the same in the same radial section direction of the cylindrical shell body; the widths of the second reinforcing ribs at different positions are the same, and the heights of the second reinforcing ribs are gradually increased from two ends to the middle in the axial direction of the cylindrical shell body and are the same in the same radial section direction of the cylindrical shell body.

3. The grid reinforced rib column shell of claim 2, wherein the first direction of the plurality of first reinforcing ribs is the same as the axial direction of the column shell body, and the plurality of first reinforcing ribs are circumferentially spaced along the column shell body; the second direction of a plurality of second strengthening ribs is the same as the circumferential direction of the column shell body, and the second strengthening ribs are distributed at intervals along the axial direction of the column shell body.

4. The grid reinforcing rib column shell according to claim 3, wherein the heights of the plurality of first reinforcing ribs change linearly or continuously curvilinearly, and the heights of the plurality of second reinforcing ribs change linearly or discontinuously curvilinearly from both ends to the middle in the axial direction of the column shell body.

5. The grid stiffener housing of claim 3, wherein the first stiffener has a maximum height less than 2 times the minimum height and the second stiffener has a maximum height less than 2 times the minimum height.

6. The grid reinforcement column housing of claim 3, wherein the width of the first plurality of ribs is the same as the width of the second plurality of ribs.

7. The lattice reinforced rib column shell of claim 2, wherein the first direction of the plurality of first reinforcing ribs is oblique to the column shell body axial direction, and the second direction of the plurality of second reinforcing ribs is oblique to the column shell body axial direction.

8. The grid reinforcing bar column casing of claim 5, wherein the height of the plurality of first reinforcing bars varies linearly or curvilinearly, and the height of the plurality of second reinforcing bars varies linearly or curvilinearly.

9. A launch vehicle having a lattice-stiffened column shell of any one of claims 1-8.

10. A method of manufacturing a grid reinforcing bar column casing according to any one of claims 1 to 8, comprising the steps of:

processing a preset contour plate: processing a preset contour plate by adopting a milling mode according to the rule that the height of the grid reinforcing ribs changes along the length direction of the column shell body, wherein the contour plate gradually becomes thicker from two ends to the middle in the length direction;

processing grid reinforcing ribs: machining the grid reinforcing ribs on the contour plate in a milling mode to obtain a machined molding plate;

forming a column shell: and roll bending the machined forming plate by adopting a roll bending mode, and then butt welding the machined forming plate by combining a friction stir welding mode.

Technical Field

The invention relates to the field of design of main bearing members of aerospace structures, in particular to a grid reinforcing rib column shell, a carrier rocket with the grid reinforcing rib column shell and a processing method of the carrier rocket.

Background

With the continuous exploration of the aerospace field by human beings, the diameter of a carrier rocket serving as a main tool for transporting spacecrafts to the space by human beings is continuously increased, the service environment is more and more rigorous, and higher requirements are provided for the bearing capacity of the carrier rocket structure. The main bearing structures of the carrier rocket, such as the boosting structure and the storage tank, and the like, adopt a large number of grid reinforced column shell structures. For the traditional grid reinforced column-shell structure, the increase of the carrying capacity of the launch vehicle structure usually means the increase of the structure weight, which causes the great reduction of the carrying capacity of the launch vehicle. To date, it has been a significant challenge in the aerospace field to avoid excessive increases in the weight of structures while increasing their load carrying capacity. On the other hand, how to reduce the structural dry weight of the launch vehicle and ensure that the structural load-bearing capacity is not seriously affected is a research topic which is being overcome by related technicians. In conclusion, the improvement of the carrying capacity of the carrier rocket and the reduction of the dry weight of the structure have great significance in propelling the development of aerospace industry. The research on the structure of the related grid reinforced column shell shows that the bearing capacity of grid reinforced column shells in different structural forms has great difference, so that the research on the novel grid reinforced column shell structure provides an effective solution for improving the bearing capacity of a carrier rocket and reducing the dry weight of the structure. The development of the novel structure of the grid reinforced column shell with higher bearing capacity has important engineering significance for realizing the lightweight design of the spacecraft.

The arrow bearing structure of the carrier rocket is mainly subjected to the reaction force of the adjacent sections, and the main form of the reaction force is bending moment, axial force and shearing force acting on the cabin section. In analyzing the load-bearing capacity of a structure, a bending moment is often equivalent to an axial force, and a shear force is usually much smaller than the axial force without considering the influence on the load-bearing capacity of the structure. Under various load effects, the force bearing structure stress model of the rocket body can be simplified into a grid reinforced column shell mechanical model only bearing the axial pressure effect.

Thin-walled structures such as grid reinforced column shells and the like can be subjected to initial defects of different degrees in the manufacturing, transporting, installing and using processes, and the initial defects can cause the structural performance to be greatly reduced. The initial defects of the thin-wall structure are generally divided into physical defects and geometric defects, wherein the physical defects comprise defects of structural inclusion, residual stress caused by welding and roll bending and the like, and the geometric defects comprise defects of non-roundness of a section, non-uniform wall thickness, non-straight axis and the like. Initial defects of different degrees exist in an actual structure, so that great difference exists between numerical calculation and experimental results of the thin-wall structure. In order to systematically research the influence of initial defects on the bearing capacity of grid reinforced column shell structures with different configurations, different defect sensitivity analysis methods are successively proposed. In the defect sensitivity analysis method, most of the defect sensitivity of the bearing capacity of the grid reinforced column shell relative to the initial defect is represented by a reduction factor, wherein the reduction factor is equal to the ratio of the limit load of a thin-wall structure in a defect-containing state to the limit load of the thin-wall structure in a defect-free state, and therefore the reduction factor is a certain value between 0 and 1. Moreover, the higher the reduction factor, the smaller the influence of the initial defect on the structure performance is, and the lower the defect sensitivity of the structure is; conversely, the higher the defect sensitivity of the structure. In actual engineering, the bearing capacity of a thin-wall structure without defects is only concerned, so that the potential safety hazard of the structure is often caused, and the capacity of the structure in the aspect of resisting the defects is considered in a novel structural design scheme, so that a novel grid reinforced column shell structure with a high reduction factor is developed.

With the continuous development and improvement of grid reinforcement structure manufacturing technologies such as the replacement of a chemical milling technology, the combination of a roll bending technology and a mechanical milling technology, a digital manufacturing technology and the like by a mechanical milling technology, the manufacturing error of the grid reinforcement structure is reduced to a certain extent, but the structure still has physical defects and geometric defects in other aspects. The initial structural defects are multifaceted and are random factors that inevitably affect the load bearing capacity of the structure. In line with the development of the era, the diameter of the launch vehicle is increased, which results in that the diameter-thickness ratio (the ratio of the diameter to the equivalent thickness of the rocket body) of the rocket body structure is increased. Studies have shown that the larger the aspect ratio of the thin-walled shell, the more sensitive the structure is to initial defects. For the grid reinforced column shell structure with large diameter, the novel structure scheme with low defect sensitivity can bring more considerable practical value and has wide application prospect.

The experiment cost of the grid reinforced structure is too high, and large-scale related experiments are not facilitated, so that the approach of obtaining the structural performance index based on the fine numerical analysis method is widely applied to the research of the grid reinforced structure. Researchers develop sensitivity analysis of the grid reinforcement structure about various defects, and consider the influence of defects such as characteristic value modal defects, concentration defects, single-point depression defects, adverse multi-point depression defects, weld defects and the like on the bearing capacity of the grid reinforcement structure. The optimization work of the grid reinforced structure is correspondingly improved, and the structure weight reduction and the structure bearing capacity improvement achieve certain effect under the optimization technology. However, it is worth noting that most of the related research works are directed to a specific grid reinforcement structure, and no new structural scheme with lower defect sensitivity is developed.

With regard to the failure mode of the grid reinforced structure, researchers also carry out various researches, and find that buckling instability of the structure always occurs in the force bearing component before strength failure, and buckling instability failure of most structures starts from the middle part of the force bearing component, which is related to that the stability condition is not satisfied before the position of the middle part of the grid reinforced structure subjected to axial load. The bearing capacity of the grid reinforced structure is improved, and a novel bearing structure with excellent mechanical property is developed, so that the damage form of the bearing member can be guided to a state which is less prone to occur from the aspect of the damage form of the structure.

In summary, there is a need to provide a grid reinforcing rib column shell structure to reduce the sensitivity of the grid reinforcing rib structure to initial defects, reduce the influence of the initial defects on the bearing capacity of the grid reinforcing rib structure, and provide a feasible structural scheme for the lightweight design of the dry weight of the launch vehicle structure.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a lattice reinforcing rib column casing, which can improve the bearing capacity of the lattice reinforcing rib column casing, has a simple processing technology, can realize a lightweight design of the column casing, and is suitable for large-scale mass production.

According to an embodiment of the first aspect of the invention, the grid reinforcing bar column shell comprises:

a column shell body having an inner circumferential surface;

the grid reinforcing ribs are arranged on the whole inner circumferential surface, and the rib body sections of the grid reinforcing ribs are gradually increased from two ends to the middle in the axial direction of the column shell body.

According to the grid reinforcing rib column shell provided by the embodiment of the invention, the rigidity of the column shell body is enhanced by arranging the grid reinforcing ribs on the inner periphery of the column shell body, the rib body sections of the grid reinforcing ribs are gradually increased from two ends to the middle part in the axial direction of the column shell body, the rigidity of the two ends of the column shell body is reduced, the rigidity of the middle part of the column shell body is enhanced, the buckling instability of the middle part of the column shell body is avoided, the bearing capacity of a bearing structure is improved, and the sensitivity of the structure to initial defects is reduced. The column casing body is cylindrical, set up the net strengthening rib at columniform column casing body inner peripheral surface, the muscle body cross-section of net strengthening rib is crescent to the middle part by both ends on column casing body axial direction, it is high to form the middle part rib, the rib overall arrangement that the both ends rib is low, column casing body middle part rigidity has been improved, when receiving axial load, avoided column casing body middle part to take place buckling instability earlier and lead to the column casing fracture, the bearing capacity of net strengthening rib column casing has been strengthened, the simultaneous processing technology is simple, can make the column casing realize the lightweight design and be fit for carrying out extensive volume production.

According to an embodiment of the first aspect of the present invention, the grid reinforcing ribs include a plurality of first reinforcing ribs arranged in a first direction and a plurality of second reinforcing ribs arranged in a second direction, the plurality of first reinforcing ribs and the plurality of second reinforcing ribs intersect to form the grid; the widths of the first reinforcing ribs at different positions are the same, and the heights of the first reinforcing ribs are gradually increased from two ends to the middle part in the axial direction of the cylindrical shell body and are the same in the same radial section direction of the cylindrical shell body; the widths of the second reinforcing ribs at different positions are the same, and the heights of the second reinforcing ribs are gradually increased from two ends to the middle in the axial direction of the cylindrical shell body and are the same in the same radial section direction of the cylindrical shell body.

According to a further embodiment of the first aspect of the present invention, the first direction of the plurality of first reinforcing ribs is the same as the axial direction of the column shell body, and the plurality of first reinforcing ribs are distributed at intervals along the circumferential direction of the column shell body; the second direction of a plurality of second strengthening ribs is the same as the circumferential direction of the column shell body, and the second strengthening ribs are distributed at intervals along the axial direction of the column shell body.

According to a still further embodiment of the first aspect of the present invention, the heights of the plurality of first reinforcing ribs change continuously linearly or continuously curvilinearly, and the heights of the plurality of second reinforcing ribs change discontinuously linearly or discontinuously curvilinearly from both ends to the middle in the axial direction of the column shell body.

In accordance with a still further embodiment of the first aspect of the present invention, the first ribs have a maximum height less than 2 times the minimum height and the second ribs have a maximum height less than 2 times the minimum height.

According to a still further embodiment of the first aspect of the present invention, the width of the plurality of first reinforcing beads is the same as the width of the plurality of second reinforcing beads.

According to a further embodiment of the first aspect of the present invention, the first direction of the plurality of first reinforcing beads is oblique to the column shell body axial direction, and the second direction of the plurality of second reinforcing beads is oblique to the column shell body axial direction.

According to a still further embodiment of the first aspect of the present invention, the heights of the plurality of first reinforcing beads change linearly or continuously curvilinearly, and the heights of the plurality of second reinforcing beads change linearly or continuously curvilinearly.

The invention also provides a carrier rocket in the second aspect.

A launch vehicle according to an embodiment of the second aspect of the invention having a lattice-stiffened column shell according to any one of the embodiments described above.

The third aspect of the present invention further provides a method for processing the grid reinforced column casing according to any one of the embodiments of the first aspect.

The processing method of the grid reinforcing rib column shell according to the embodiment of the third aspect of the invention comprises the following steps:

processing a preset contour plate: processing a preset contour plate by adopting a milling mode according to the rule that the height of the grid reinforcing ribs changes along the length direction of the column shell body, wherein the contour plate gradually becomes thicker from two ends to the middle in the length direction;

processing grid reinforcing ribs: machining the grid reinforcing ribs on the contour plate in a milling mode to obtain a machined molding plate;

forming a column shell: and roll bending the machined forming plate by adopting a roll bending mode, and then butt welding the machined forming plate by combining a friction stir welding mode.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a grid-stiffened column casing according to an embodiment of the first aspect of the present invention.

Fig. 2 is a partially enlarged schematic view of a grid-stiffened column casing according to an embodiment of the first aspect of the present invention.

Fig. 3 is a schematic view of the first reinforcing rib of the grid reinforced column casing according to the embodiment of the first aspect of the present invention, when the height of the first reinforcing rib adopts a curve-type variation law.

Fig. 4 is a schematic view of the first reinforcing rib of the grid reinforced column casing according to the embodiment of the first aspect of the present invention, when the height of the first reinforcing rib is linearly changed.

Reference numerals:

grid reinforcing rib column shell 1000

The column shell body 1 has an inner peripheral surface 11 and an outer peripheral surface 12

Grid reinforcing rib 2, first reinforcing rib 21 and second reinforcing rib 22

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

A lattice stiffener cylinder housing 1000 according to an embodiment of the present invention is described below with reference to fig. 1 to 4.

As shown in fig. 1 to 4, the lattice reinforcement column casing 1000 according to the embodiment of the first aspect of the present invention includes a casing body 1 and lattice reinforcements 2. Wherein the column case body 1 has an inner peripheral surface 11; the grid reinforcing ribs 2 are arranged on the whole inner circumferential surface 11, and the rib body sections of the grid reinforcing ribs 2 are gradually increased from two ends to the middle in the axial direction of the column shell body 1.

Specifically, the column shell body 1 is used as a main force-bearing component and is provided with an inner circumferential surface 11 and an outer circumferential surface 12, as shown in fig. 1, the column shell body 1 can be cylindrical, the inner circumferential surface 11 of the cylindrical column shell body 1 is provided with grid reinforcing ribs 2, the rib body sections of the grid reinforcing ribs 2 are gradually increased from two ends to the middle in the axial direction of the column shell body 1, the rigidity of the two ends of the column shell body 1 is reduced, the rigidity of the middle of the column shell body 1 is enhanced, buckling instability in the middle of the column shell body 1 is avoided, the bearing capacity of the force-bearing structure is improved, and the sensitivity of the structure to initial defects is reduced; the outer peripheral surface 12 of the cylindrical column shell body 1 is smooth, so that the outer peripheral surface 12 of the grid reinforcing rib column shell 1000 is attractive.

The grid reinforcing ribs 2 are arranged on the inner circumferential surface 11 of the column shell body 1, an integrated piece can be formed, the cross section of each rib is gradually increased from two ends to the middle in the axial direction of the column shell body 1, the rigidity of the two ends of the column shell body 1 is reduced, the rigidity of the middle of the column shell body 1 is enhanced, when the column shell body 1 is subjected to axial load, buckling instability occurs in the column shell body 1 before strength damage, the column shell body 1 is bent to enable the middle of the column shell body 1 to lose a stable state, the grid reinforcing ribs 2 are arranged on the inner circumferential surface 11 of the column shell body 1, buckling instability occurring in the middle of the column shell body 1 first is avoided, the bearing capacity of a bearing structure is improved, and the sensitivity of the structure to initial defects is reduced.

According to the grid reinforcing rib column casing 1000 provided by the embodiment of the invention, the rigidity of the column casing body 1 is enhanced by arranging the grid reinforcing ribs on the inner periphery of the column casing body 1, the section of the rib body of the grid reinforcing ribs 2 is gradually increased from two ends to the middle in the axial direction of the column casing body 1, the rigidity of the two ends of the column casing body 1 is reduced, the rigidity of the middle of the column casing body 1 is enhanced, buckling instability in the middle of the column casing body 1 is avoided, the bearing capacity of a bearing structure is improved, and the sensitivity of the structure to initial defects is reduced. Column shell body 1 is cylindrical, 11 sets up the net strengthening rib at 1 inner peripheral surface of columniform column shell body, the rib body cross-section of net strengthening rib 2 is crescent to the middle part by both ends on 1 axial direction of column shell body, it is high to form the middle part rib, the rib overall arrangement that the both ends rib is low, 1 middle part rigidity of column shell body has been improved, when receiving axial load, avoided 1 middle part of column shell body to take place buckling instability earlier and lead to the column shell fracture, the bearing capacity of net strengthening rib column shell 1000 has been strengthened, the simultaneous processing technology is simple, can make the column shell realize lightweight design and be fit for carrying out extensive volume production.

According to one embodiment of the first aspect of the present invention, the grid reinforcing rib 2 includes a plurality of first reinforcing ribs 21 arranged in a first direction and a plurality of second reinforcing ribs 22 arranged in a second direction, the plurality of first reinforcing ribs 21 intersecting the plurality of second reinforcing ribs 22 to form a grid; the widths of the first reinforcing ribs 21 at different positions are the same, and the heights of the first reinforcing ribs 21 are gradually increased from two ends to the middle in the axial direction of the column shell body 1 and are the same in the same radial section direction of the column shell body 1; the widths of the second reinforcing ribs 22 at different positions are the same, and the heights of the second reinforcing ribs 22 are gradually increased from two ends to the middle in the axial direction of the cylindrical shell body 1 and are the same in the same radial section direction of the cylindrical shell body 1. It is understood that the first direction and the second direction may be any directions but the direction of the first direction is different from the direction of the second direction, so that the plurality of first reinforcing ribs 21 and the plurality of second reinforcing ribs 22 are arranged to intersect with each other on the inner circumferential surface 11 of the column shell body 1 to form a grid, so that the strength of the column shell body 1 is improved; the widths of the first reinforcing ribs 21 at different positions are the same, and the widths of the second reinforcing ribs 22 at different positions are the same, so that the first reinforcing ribs 21 and the second reinforcing ribs 22 can be of standard sizes, the processing difficulty is low, the initial defect degree is low, the reduction factor is high, the defect sensitivity is low, and the bearing capacity of the grid reinforcing rib column shell 1000 is high; the height of a plurality of first strengthening ribs 21 is the same in the same radial cross section direction of the column shell body 1 by both ends to middle part crescent on the column shell body 1 axial direction, the height of a plurality of second strengthening ribs 22 is the same in the same radial cross section direction of the column shell body 1 by both ends to middle part crescent on the column shell body 1 axial direction, therefore, the rigidity of the column shell body 1 both ends is reduced and the rigidity of the column shell body 1 middle part is enhanced, buckling instability in the column shell body 1 middle part is avoided, the bearing capacity of the grid strengthening rib column shell 1000 on the same radial cross section is improved, and the sensitivity of the structure to the initial defect is reduced.

According to a further embodiment of the first aspect of the present invention, the first direction of the plurality of first reinforcing ribs 21 is the same as the axial direction of the column shell body 1, and the plurality of first reinforcing ribs 21 are distributed at intervals along the circumferential direction of the column shell body 1; the second direction of a plurality of second strengthening ribs 22 is the same as the circumference of the column shell body 1, and a plurality of second strengthening ribs 22 are distributed along the axial direction of the column shell body 1 at intervals. It can be understood that a plurality of first strengthening ribs 21 intersect with a plurality of second strengthening ribs 22 perpendicularly, and a plurality of second strengthening ribs 22 that distribute along the axial direction of the column shell body 1 are highly changed correspondingly along with the height change of the first strengthening ribs 21, so that the second strengthening ribs 22 that are closer to the middle part of the column shell body 1 are higher, and the first strengthening ribs 21 that are closer to the two ends of the column shell body 1 are lower, so that the rigidity of the two ends of the column shell body 1 is reduced, the rigidity of the middle part of the column shell body 1 is enhanced, and the problem that the middle part of the column shell body 1 is bent and deformed to cause the structure to lose a stable state is avoided.

According to a still further embodiment of the first aspect of the present invention, the heights of the plurality of first reinforcing beads 21 vary linearly or curvilinearly continuously, and the heights of the plurality of second reinforcing beads 22 vary linearly or curvilinearly discontinuously from both ends to the middle in the axial direction of the column shell body 1. It can be understood that the height of the plurality of first reinforcing ribs 21 increases continuously from both ends to the middle in the axial direction, as shown in fig. 3 and 4, the first reinforcing ribs 21 may increase in a curved shape or increase in a linear shape, the plurality of second reinforcing ribs 22 are distributed at intervals in the axial direction on the inner circumferential surface 11 of the column shell body 1, the height of each section of one second reinforcing rib 22 of the plurality of second reinforcing ribs 22 is not changed and the height of the plurality of second reinforcing ribs 22 at the intersection with the plurality of first reinforcing ribs 21 is the same, so that the second reinforcing ribs 22 change in a linear or curved shape discontinuously from both ends to the middle in the axial direction of the column shell body 1. From this for 1 both ends rigidity of column shell body reduces and 1 middle part rigidity reinforcing of column shell body, avoids 1 middle part of column shell body to take place bending deformation first and make the structure lose stable state.

According to a still further embodiment of the first aspect of the present invention the highest height of the first ribs 21 is less than 2 times the lowest height and the highest height of the second ribs 22 is less than 2 times the lowest height. From this, avoid because the grid adds the both ends of muscle post and the middle part difference is too big excessively leads the both ends of grid strengthening rib post shell 1000 with the destruction form of post shell body 1.

According to a still further embodiment of the first aspect of the present invention, the width of the plurality of first reinforcing beads 21 is the same as the width of the plurality of second reinforcing beads 22. Therefore, the widths of the first reinforcing ribs 21 and the second reinforcing ribs 22 are standard sizes, the processing difficulty is low, the initial defect degree is low, the reduction factor is high, the defect sensitivity is low, and the bearing capacity of the grid reinforcing rib column shell 1000 is high.

According to a further embodiment of the first aspect of the present invention, a first direction of the plurality of first reinforcing beads 21 is oblique to the axial direction of the column shell body 1, and a second direction of the plurality of second reinforcing beads 22 is oblique to the axial direction of the column shell body 1. It will be appreciated that the skew between the first ribs 21 and the second ribs 22 may include the following: firstly, a plurality of first reinforcing ribs 21 are arranged along the axial direction of the column shell body 1, the second direction of a plurality of second reinforcing ribs 22 is oblique to the axial direction of the column shell body 1, and the plurality of first reinforcing ribs 21 and the plurality of second reinforcing ribs 22 are intersected to form a grid; secondly, a plurality of second reinforcing ribs 22 are arranged along the circumferential direction of the column shell, the first direction of the plurality of first reinforcing ribs 21 is obliquely crossed with the circumferential direction of the column shell body 1, and the plurality of first reinforcing ribs 21 and the plurality of second reinforcing ribs 22 are crossed to form a grid; thirdly, the first direction of the first reinforcing ribs 21 is oblique to the axial direction of the column shell body 1, the second direction of the second reinforcing ribs 22 is oblique to the axial direction of the column shell body 1, and the first reinforcing ribs 21 and the second reinforcing ribs 22 intersect to form a grid. Therefore, the bearing capacity of the column shell body 1 is increased, the processing technology is simple, the column shell can be designed in a light weight mode, and the column shell is suitable for large-scale mass production.

According to a still further embodiment of the first aspect of the present invention, the heights of the plurality of first reinforcing beads 21 change linearly or continuously curvilinearly, and the heights of the plurality of second reinforcing beads 22 change linearly or continuously curvilinearly. It can be understood that the heights of the plurality of first reinforcing ribs 21 and the plurality of second reinforcing ribs 22 are continuously increased from the two ends to the middle in the axial direction, as shown in fig. 3 and 4, the heights of the plurality of first reinforcing ribs 21 and the plurality of second reinforcing ribs 22 are the same at the intersection of the inner peripheral surface 11 of the column shell body 1 and the first reinforcing ribs 21, and the first reinforcing ribs 21 and the second reinforcing ribs 22 can be increased in a curved shape or a straight shape. From this for 1 both ends rigidity of column shell body reduces and 1 middle part rigidity reinforcing of column shell body, avoids 1 middle part of column shell body to take place bending deformation first and make the structure lose stable state.

The invention also provides a carrier rocket.

A launch vehicle according to an embodiment of the second aspect of the invention has a lattice-stiffened column shell 1000 according to any of the embodiments described above. It can be understood that the main bearing structure of the carrier rocket, such as the boosting structure and the storage box, adopts the grid reinforcing rib column shell 1000 as the bearing structure of the rocket body.

The third aspect of the present invention further provides a method for processing the grid reinforced column casing 1000 according to any one of the embodiments of the first aspect.

The processing method of the grid reinforcing rib column casing 1000 according to the embodiment of the third aspect of the invention comprises the following steps:

processing a preset contour plate: according to the rule that the height of the grid reinforcing ribs 2 changes along the length direction of the column shell body 1, a preset contour plate is processed in a milling mode, and the contour plate gradually becomes thicker from two ends to the middle in the length direction;

and (3) processing grid reinforcing ribs 2: machining grid reinforcing ribs 2 on the contour plate in a milling mode to obtain a machined forming plate;

forming a column shell: and (3) roll bending the machined plates in a roll bending mode, and then butt welding the machined plates in a friction stir welding mode.

According to the processing method of the third aspect of the invention, the contour plates with thin two ends and thick middle are processed in a milling mode according to the actually required rib height, so that the rigidity of the two ends of the column shell body 1 is reduced, the rigidity of the middle part of the column shell body 1 is enhanced, buckling instability in the middle part of the column shell body 1 is avoided, and the bearing capacity of the bearing structure is improved; then, a plurality of first reinforcing ribs 21 and a plurality of second reinforcing ribs 22 with the same width are machined on a preset contour plate in a milling mode, and a grid area between the first reinforcing ribs 21 and the second reinforcing ribs 22 is milled to the thickness position of the column shell body 1, so that the widths of the first reinforcing ribs 21 and the second reinforcing ribs 22 are all standard sizes, the machining difficulty is low, the initial defect degree is low, the reduction factor is high, the defect sensitivity is low, and the bearing capacity of the grid reinforcing rib column shell 1000 is high; and finally, the roll bending technology is used for roll bending the forming plate, the smooth surface is the outer peripheral surface, the friction stir welding mode is combined to butt-joint the formed plates, the processing technology is simple, the column shell can be designed in a light weight mode, and the column shell is suitable for large-scale mass production.

It should be noted that the height of the middle reinforcing rib and the height of the end reinforcing rib, the width of the reinforcing rib, the thickness of the column shell body 1, the number of the first reinforcing ribs 21 and the number of the second reinforcing ribs 22 of the inner circumferential surface 11 of the column shell body 1 can be determined by a numerical optimization technique according to the indexes such as the diameter, the length, the utility and the like of the grid reinforcing rib column shell 1000.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.