A cylindrical sine-wave corrugated ring-stiffened pressure hull

Abstract

The present invention provides a cylindrical sine corrugated ring rib pressure hull. A sine corrugated ring rib structure is axially arranged on the inner surface of the cylindrical sine corrugated ring rib pressure hull, and the sine corrugated ring rib structure conforms to the corrugated morphology of the sine function y = a·sin(2πx / T), where a represents the amplitude of the sine function and T represents the period of the sine function. The technical solution of the present invention solves the problems of residual stress generated by the welding of ring ribs and the cumbersome welding process in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure hulls, and in particular to a cylindrical sinusoidal corrugated ring-rib pressure hull. Background Art

[0002] The cylindrical pressure hull has the characteristics of high space utilization and easy production and processing. It is widely used in submersibles, storage tanks and various engineering structures. Under the conditions of small diameter, height and external pressure, the stability of ordinary cylindrical pressure hull can be ensured by adjusting the shell thickness. However, with the gradual expansion of the application of ordinary cylindrical pressure hulls, the demand for diameter, height and external pressure gradually increases, and it is necessary to weld ring ribs inside the shell and increase the thickness of the cylinder section to improve the pressure resistance. The shape of the ring ribs is generally rectangular, triangular, cylindrical, T-shaped, etc. The stability of the ordinary cylindrical pressure hull can be effectively improved by adjusting the parameters such as the spacing and shape and size of the ring ribs.

[0003] At present, the connection between the ring ribs and the ordinary cylindrical pressure hull is mostly achieved through welding technology. However, the process of welding the ring ribs is cumbersome and time-consuming, and it will also increase the overall weight of the pressure hull. There are residual stress and deformation at the weld after welding. Although the residual stress and deformation can be eliminated through special means, there is still a gap. When under pressure, the shell between adjacent ring ribs is prone to buckling and depression, which seriously affects the service life of the pressure hull. Summary of the invention

[0004] According to the above-mentioned technical problems of residual stress in welded ring ribs and complicated welding process, a cylindrical sinusoidal corrugated ring rib pressure hull is provided. The present invention mainly utilizes integrated rolling technology to process a cylindrical pressure hull with a sinusoidal corrugated ring rib structure, which not only has excellent pressure resistance and stability, but also avoids welding residual stress, simplifies the processing technology, and achieves the effect of lightweighting and weight reduction.

[0005] The technical means adopted by the present invention are as follows:

[0006] The present invention provides a cylindrical sinusoidal corrugated ring rib pressure hull, wherein the inner surface of the cylindrical sinusoidal corrugated ring rib pressure hull is axially provided with a sinusoidal corrugated ring rib structure, and the sinusoidal corrugated ring rib structure conforms to the corrugation morphology of the sinusoidal function y=a·sin(2πx / T), where a represents the amplitude of the sinusoidal function and T represents the period of the sinusoidal function.

[0007] Furthermore, the shell thickness d at a certain position x =d m ±a sin(2πx / T), where d x represents the shell thickness at a random position, d mdenotes the average thickness of the cylindrical sinusoidal corrugated ring rib pressure hull, and the height of the cylindrical sinusoidal corrugated ring rib pressure hull = corrugation width × number of corrugations.

[0008] Furthermore, the cylindrical sinusoidal corrugated ring rib pressure hull is an integrated structure obtained by continuous rolling using a shell rolling equipment.

[0009] The rolling processing method of the cylindrical sinusoidal corrugated ring rib pressure hull includes the following steps:

[0010] S1. Pre-pressure: The corrugated core roll first feeds a small distance, which is set as the height h of the corrugation profile. The rolling system starts to operate. After the entire rolling system gradually stabilizes, the corrugated core roll then starts to feed towards the predetermined rolling position.

[0011] S2. Rolling: First, form the corrugations, and then roll to the target thickness. After rolling starts, each wave crest in the corrugations of the corrugated core roll contacts the shell. As the corrugated core roll feeds, the contact length between the corrugation curve of the corrugated core roll and the inner wall of the shell along the axial direction of the shell gradually increases, that is, from point contact to complete line contact in the axial direction until each wave trough position of the corrugation profile of the corrugated core roll contacts the shell surface. After that, the position relationship between the shell and the corrugated core roll remains unchanged, the corrugated core roll stops feeding, and the driving roll continues to rotate to keep the corrugations of the corrugated core roll basically fitting with the corrugations of the shell until a complete corrugation profile is formed in the entire circumferential direction of the shell.

[0012] The time when the surface of the corrugated core roll is fully in contact with the shell is:

[0013] t1 = h / v y

[0014] In the formula: h is the vertical distance from the wave crest position to the wave trough position; v y is the feeding speed of the corrugated core roll;

[0015] Before the time t1, the contact between the corrugated core roll and the shell is insufficient and the corrugation profile is incomplete. Therefore, it is necessary to continue rolling a certain number of turns until the target wall thickness of the shell is reached. The time used is:

[0016] t2 = 2πRn / ωR1

[0017] In the formula: R is the outer diameter of the shell; n is the number of turns that the shell rotates after the time t1; R1 is the radius of the driving roll; ω is the rotational speed of the driving roll;

[0018] The minimum time required for the corrugation forming stage is the sum of the two:

[0019]

[0020] S3. Rounding: When the complete corrugated profile is formed in the circumferential direction of the cylinder section, the corrugated core roller stops feeding further. The cross-sectional corrugated profile at the corrugated rolling position where the cylinder section contacts the corrugated core roller no longer changes, and the width of the cross-section becomes smaller.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. A cylindrical sinusoidal corrugated ring rib pressure-resistant shell provided by the present invention is integrally formed into a cylindrical sinusoidal corrugated ring rib pressure-resistant shell by continuous rolling of a rolling mill, which has good compressive performance and stability, extends the service life, also avoids the residual stress generated by the welding process, simplifies the production process, and the integrated structure of the cylindrical corrugated ring rib pressure-resistant shell can achieve the effect of weight reduction and lightening.

[0023] 2. The outer surface of the cylindrical sinusoidal corrugated ring rib pressure-resistant shell provided by the present invention is flat and smooth without processing. Under the external pressure condition, the surface can be more evenly stressed, and it is also convenient to cooperate and assemble with other components, so it is more widely used.

[0024] In summary, rolling the cylindrical sinusoidal corrugated ring rib pressure-resistant shell by applying the technical solution of the present invention not only has good compressive capacity and stability, but also avoids the welding residual stress and the welding process, simplifying the production process. Therefore, the technical solution of the present invention solves the problems of residual stress in the rib welding and cumbersome processing technology in the prior art.

[0025] For the above reasons, the present invention can be widely promoted in the fields of pressure-resistant shells and the like. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 It is a schematic longitudinal section structure diagram of the cylindrical sinusoidal corrugated ring rib pressure-resistant shell described in Embodiment 1 of the present invention.

[0028] Figure 2 It is a schematic diagram of the corrugated ring rib structure of the sine function described in Embodiment 1 of the present invention.

[0029] Figure 3 It is a non-linear analysis load-displacement curve diagram of the cylindrical sinusoidal corrugated ring rib pressure-resistant shell and the ordinary cylindrical pressure-resistant shell described in Embodiment 1 of the present invention.

[0030] Figure 4Schematic diagram for comparison between the cross-section of the sine corrugated ring rib and the cross-section of the triangular ring rib described in Embodiment 1 of the present invention. Detailed implementation manners

[0031] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part rather than all of the embodiments of the present invention. The description of at least one exemplary embodiment below is actually only illustrative and in no way limits the present invention and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] It should be noted that the terms used herein are only for describing the specific implementation manners and are not intended to limit the exemplary embodiments of the present invention. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of the described features, steps, operations, devices, components and / or their combinations.

[0034] Unless otherwise specifically stated, the relative arrangements of the components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for the convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods and devices should be regarded as part of the authorization specification. In all the examples shown and discussed herein, any specific values should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, back, top, bottom, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary instructions, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present invention: the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0036] For the sake of convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "upper" etc. can be used here to describe the spatial positional relationship between a device or feature shown in the drawings and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the drawings for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations are made for the spatial relative descriptions used here.

[0037] In addition, it should be noted that using words such as "first", "second", etc. to limit components is only for the convenience of distinguishing the corresponding components. Without additional statements, the above words have no special meanings. Therefore, it should not be construed as a limitation on the protection scope of the present invention.

[0038] Embodiment 1

[0039] As Figure 1 shown, the present invention provides a cylindrical sinusoidal corrugated ring rib pressure hull (hereinafter referred to as corrugated ring rib pressure hull), which belongs to a single-layer hull. A continuous sinusoidal corrugated ring rib structure is arranged along the axial direction on the inner surface of the corrugated ring rib pressure hull. The sinusoidal corrugation structure conforms to the corrugation morphology of the sine function y = a·sin(2πx / T). Wherein, the central axis of the cylindrical sinusoidal corrugated ring rib pressure hull is used as the x-axis, the radial direction is used as the y-axis, x and y have no special meanings as independent variables and dependent variables, a represents the amplitude of the sine function, T represents the period of the sine function, and the outer surface of the corrugated ring rib pressure hull is a smooth cylindrical structure;

[0040] The cylindrical sinusoidal corrugated ring rib pressure hull is an integral structure obtained by continuous rolling through a shell rolling equipment.

[0041] Furthermore, the amplitude of the sine wave morphology refers to the distance between adjacent wave crests and wave troughs, which is twice the amplitude of the sine function. The thickness of the shell changes according to the function period. The thickness d of the shell at a certain position x = d m ±a sin(2πx / T), where d x represents the thickness of the shell at a certain random position, and d m represents the average thickness of the cylindrical sine wave corrugated ring rib pressure hull.

[0042] The amplitude of the sine wave morphology and the thickness of the shell should be determined according to the application scenario, taking into account the factors of weight reduction and volume expansion, that is, improving the specific gravity ratio. Therefore, the amplitude of the sine wave morphology should not be too large, and the thickness of the shell should not be too thick. While improving the compressive performance, the specific gravity ratio should be taken into account. Moreover, as the width and amplitude of the corrugated ring rib structure increase, the buckling performance of the corrugated ring rib pressure hull first increases and then decreases, and the influence of the amplitude of the corrugated ring rib structure on the buckling performance is more obvious. At the same time, the strengthening effect of the sine wave corrugated ring rib structure on the pressure hull will weaken with the increase of the shell thickness. Therefore, the sine wave corrugated ring rib structure is more suitable for thin shell structures. However, if the thickness of the corrugated ring rib pressure hull is too thin, plate shell distortion failure will occur between multiple rigid rings. Therefore, strict consideration should be given in the design of the sine wave corrugated ring rib structure, and factors such as the number, width and height of the corrugations should be comprehensively considered.

[0043] Furthermore, the height of the cylinder section of the cylindrical sine wave corrugated ring rib pressure hull = corrugation width × number of corrugations.

[0044] The rolling processing method of the cylindrical sine wave corrugated ring rib pressure hull includes the following steps:

[0045] S1. Pre-pressure: The corrugated core roll first feeds a small distance, which is set as the height h of the sine wave morphology. The rolling system starts to operate. After the whole rolling system gradually stabilizes, the corrugated core roll starts to feed to the predetermined rolling position.

[0046] S2. Rolling: First, form the corrugations, and then roll to the target thickness. After rolling starts, each wave crest in the corrugations of the corrugated core roll contacts the cylinder section. As the corrugated core roll feeds, the contact length between the corrugated curve of the corrugated core roll and the inner wall of the cylinder section along the axial direction of the cylinder section gradually increases, that is, from point contact to complete line contact in the axial direction until each wave trough position of the corrugated morphology of the corrugated core roll contacts the surface of the cylinder section. After that, the position relationship between the cylinder section and the corrugated core roll remains unchanged, the corrugated core roll stops feeding, and the driving roll continues to rotate to keep the corrugations of the corrugated core roll basically fitting with the corrugations of the cylinder section until a complete corrugated morphology is formed in the entire circumference of the cylinder section.

[0047] The time when the corrugated core roll surface is in full contact with the cylinder section is:

[0048] t1 = h / v y

[0049] Where: h is the vertical distance from the wave crest position to the wave trough position; v y is the feeding speed of the corrugated core roll;

[0050] Before the time t1, the contact between the corrugated core roll and the cylinder section is insufficient, and the corrugation morphology is incomplete. Therefore, a certain number of turns need to be continuously rolled until the target wall thickness of the cylinder section is reached. The time used is:

[0051] t2 = 2πRn / ωR1

[0052] Where: R is the outer diameter of the cylinder section; n is the number of turns of the cylinder section rotation after the time t1; R1 is the radius of the driving roll; ω is the rotational speed of the driving roll;

[0053] The minimum time required for the corrugation forming stage is the sum of the two:

[0054]

[0055] S3. Rounding: When the complete corrugation morphology is formed in the circumferential direction of the cylinder section, the corrugated core roll no longer feeds, and the cross-sectional corrugation profile at the corrugation rolling position where the cylinder section contacts the corrugated core roll no longer changes, and the width of the cross-section becomes smaller.

[0056] Furthermore, the outer diameter of the corrugated ring rib pressure hull is 300 mm and the height is 400 mm. The sine wave corrugated ring rib structure conforms to the corrugation morphology of the sine function y = 2sin(πx / 20), as Figure 2 shown. The width of the sine wave is 40 mm. The thickness of the shell of the corrugated ring rib pressure hull fluctuates periodically between 2 and 6 mm, and the average thickness of the shell is 4 mm.

[0057] Comparative Example 1

[0058] Comparative Example 1 is an ordinary cylindrical pressure hull (referred to as an ordinary pressure hull). The ordinary pressure hull has the same specific gravity and the same height as the corrugated ring rib pressure hull. The outer diameter of the ordinary pressure hull is 300 mm, the height of the shell is 400 mm, and the thickness is 4 mm.

[0059] Finite element analysis and sidewall vertical pressure test are carried out on the corrugated ring rib pressure hull described in Example 1 and the ordinary pressure hull described in Comparative Example 1. The content is as follows:

[0060] (1) Finite element simulation analysis

[0061] First, import the 3D models of the established corrugated ring rib pressure hull and the ordinary pressure hull into Abaqus software respectively. Set the materials of the corrugated ring rib pressure hull and the ordinary pressure hull to stainless steel, with an elastic modulus E of 207 GPa, a Poisson's ratio v of 0.3, and a yield strength σ of 380 MPa;

[0062] Then apply fixed boundary conditions to one end of the corrugated ring rib pressure hull: U x = U y = U z = 0 (U x represents the translational degree of freedom in the x direction, U y represents the translational degree of freedom in the y direction, U z represents the translational degree of freedom in the z direction);

[0063] Restrict the degrees of freedom in the x and y directions at the other end of the corrugated ring rib pressure hull, and do not restrict the degree of freedom in the axial z direction: U x = U y = 0;

[0064] Apply a uniform external pressure of 1 MPa to the outer surface of the cylindrical side of the corrugated ring rib cylindrical hull to obtain the finite element simulation results.

[0065] The finite element simulation parameters set for the ordinary pressure hull are the same as those of the corrugated ring rib pressure hull.

[0066] Eigenvalue buckling analysis:

[0067] When the first-order buckling load appears in the corrugated ring rib pressure hull, the corrugated ring rib pressure hull buckles immediately, the structure becomes unstable, and then buckling behavior occurs. In addition, the force in the middle of the corrugated ring rib pressure hull is relatively concentrated, and compression failure occurs first in the middle. The phenomenon of the ordinary pressure hull is similar to that of the corrugated ring rib pressure hull. The buckling phenomenon mainly occurs in the middle. The first-order eigenvalue is the final buckling state that can be achieved by the test, which is more in line with the actual situation. The comparison of the buckling loads of the ordinary pressure hull and the corrugated ring rib pressure hull is shown in Table 1. Under ideal conditions, the buckling load of the corrugated ring rib pressure hull is significantly higher than that of the ordinary pressure hull. (The eigenvalue buckling analysis is an ideal model and only for reference)

[0068] Nonlinear buckling analysis (Riks arc length method):

[0069] When performing nonlinear analysis, it is necessary to introduce the first-order buckling mode of the eigenvalue analysis result as the initial defect of the nonlinear analysis by editing keywords. The nonlinear analysis load-displacement curve is as Figure 3As shown, from the analysis of the non-linear analysis load-displacement curve, it can be seen that as the external load increases, the buckling load of the shell increases to the critical point and then enters the post-buckling stage. The displacement of the shell in the post-buckling stage continues to increase. The buckling process of the ordinary cylindrical pressure-resistant shell is the same as that of the corrugated ring rib pressure-resistant shell. As the amplitude of the introduced initial defect increases, the change of the buckling load gradually flattens out, indicating that the corrugated ring rib pressure-resistant shell is less sensitive to the initial defect and has better ability to resist the initial defect. When the external load reaches 8.05 Mpa, the corrugated ring rib pressure-resistant shell begins to buckle. When the external load reaches 7.03 Mpa, the ordinary pressure-resistant shell begins to buckle, indicating that the compressive capacity of the corrugated ring rib pressure-resistant shell is better than that of the ordinary pressure-resistant shell.

[0070] Table 1 Comparison table of finite element simulation buckling loads of the ordinary pressure-resistant shell and the corrugated ring rib pressure-resistant shell

[0071]

[0072] Since the finite element analysis model of the welded ring rib pressure-resistant shell cannot reflect its specific defects, the finite element analysis results of the welded ring rib pressure-resistant shell and the corrugated ring rib pressure-resistant shell are the same. In order to prove that the sine corrugated ring rib structure has the same effect as the welded ring rib, the buckling stress of the corrugated ring rib pressure-resistant shell is calculated by using the formula for verification.

[0073] Theoretical buckling stress calculation:

[0074] The cross-section of each circumferential corrugation on the inner surface of the corrugated ring rib pressure-resistant shell is similar to the cross-section of the triangular ring rib. As Figure 4 shown, the width of the sine corrugation corresponds to the base of the triangular ring rib, and the amplitude of the sine corrugation corresponds to the height of the triangular ring rib, which is used to calculate the cross-sectional area and moment of inertia;

[0075] The corrugated ring rib pressure-resistant shell is analyzed and calculated according to the overall stability formula of the ring rib cylindrical pressure-resistant shell:

[0076]

[0077] In the formula: E: Elastic modulus, N / mm 2 ;

[0078] n: Half-wave of circumferential instability, and its value is generally 2, 3, 4;

[0079] t: Shell thickness, that is, the thickness at the trough of the corrugated ring rib pressure-resistant shell, mm;

[0080] R: Average radius of the cylindrical shell, mm;

[0081] I: Moment of inertia of the rib cross-section, mm 4 ;

[0082] l: rib spacing, mm;

[0083] L represents the length of the pressure hull, mm;

[0084] Overall buckling stress: p cr = 0.83C s p e

[0085] Where: C S , the material physical nonlinear correction coefficient, determined by looking up the table from the parameter σ e / R eH ;

[0086] Elastic limit, N / mm 2 ;

[0087] R eH : The yield limit of the material, N / mm 2 ;

[0088] F: Rib cross-sectional area, mm 2 ;

[0089] The calculated critical buckling stress of the corrugated ring rib pressure hull is 8.814 MPa, which is very close to the nonlinear buckling analysis result of 8.05 MPa of the corrugated ring rib pressure hull (without considering the influence of welding, the finite element analysis result of the corrugated ring rib pressure hull is the same as that of the welded ring rib pressure hull), indicating that the corrugated structure in the circumferential direction can play the role of ring rib strengthening.

[0090] (2) Sidewall vertical pressure test

[0091] Place the corrugated ring rib pressure hull and the ordinary pressure hull horizontally on the press respectively, so that the upper and lower two symmetric generatrices of the sidewalls of the corrugated ring rib pressure hull and the ordinary pressure hull are in contact with the press respectively. The press applies pressure slowly, and appropriate pressure holding operations are carried out during the slow pressure application process. When the test shell is damaged, stop pressurizing immediately;

[0092] During the slow pressure application process, both the corrugated ring rib pressure hull and the ordinary pressure hull are deformed and the deformation amount gradually increases. When the pressure increases to 0.7 kN, the ordinary pressure hull undergoes structural damage; when the pressure increases to 1.5 kN, the corrugated ring rib pressure hull structure is damaged;

[0093] From the results of the sidewall vertical pressure test, it can be seen that compared with the ordinary pressure hull, the corrugated ring rib pressure hull has more excellent compressive performance under side pressure, and the compressive performance has been improved by 114%.

[0094] The cylindrical sine corrugated ring rib pressure hull provided by the present invention uses a sine corrugated structure to replace the ordinary welded ring rib structure, which not only endows the cylindrical sine corrugated ring rib pressure hull with excellent compressive capacity and stability, avoids the residual stress brought by the welding process, simplifies the production process at the same time, and the integrated structure of the cylindrical corrugated ring rib pressure hull can also achieve the effect of weight reduction and lightening.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rolling processing method for a cylindrical sinusoidal corrugated ring rib pressure hull, characterized in that, The inner surface of the cylindrical sine corrugated ring rib pressure hull is axially provided with a sine corrugated ring rib structure, and the sine corrugated ring rib structure conforms to the corrugated morphology of the sine function y = a·sin(2πx / T), where a represents the amplitude of the sine function, T represents the period of the sine function, the central axis of the cylindrical sine corrugated ring rib pressure hull is used as the x-axis, the radial direction is used as the y-axis, and x and y are used as dependent variables and independent variables; The thickness d of the housing at a certain position x = d m ±asin(2πx / T), where d x represents the thickness of the housing at a certain random position, and d m represents the average thickness of the cylindrical sinusoidal corrugated ring rib pressure hull, and the height of the cylindrical sinusoidal corrugated ring rib pressure hull = corrugation width × number of corrugations; The rolling processing method includes the following steps: S1. Pre-pressure: The corrugated core roll first feeds a small distance, which is set as the height h of the corrugated morphology. The rolling system starts to operate. After the whole rolling system gradually stabilizes, the corrugated core roll starts to feed to the predetermined rolling position; S2. Rolling: First, form the corrugations, and then roll to the target thickness; after rolling starts, each wave crest in the corrugations of the corrugated core roll contacts the cylinder section. As the corrugated core roll feeds, the corrugated curve of the corrugated core roll and the inner wall of the cylinder section gradually increase in the axial contact length along the cylinder section, that is, from point contact to complete line contact in the axial direction until each wave trough position of the corrugated morphology of the corrugated core roll contacts the surface of the cylinder section. After that, the position relationship between the cylinder section and the corrugated core roll remains unchanged, the corrugated core roll stops feeding, and the driving roll continues to rotate to keep the corrugations of the corrugated core roll basically fitting with the corrugations of the cylinder section until a complete corrugated morphology is formed in the entire circumference of the cylinder section; The time when the surface of the corrugated core roll is in full contact with the cylinder section is: t1 = h / v y Where: h is the vertical distance from the wave crest position to the wave trough position; v y is the feed speed of the corrugated core roll; Before the t1 moment, the contact between the corrugated core roll and the cylinder section is insufficient and the corrugated morphology is incomplete. Therefore, a certain number of turns need to be rolled continuously until the target wall thickness of the cylinder section is reached. The time used is: t2 = 2πRn / ωR1 In the formula: R is the outer diameter of the cylinder section; n is the number of turns of the cylinder section rotation after the t1 moment; R1 is the radius of the driving roll; ω is the rotational speed of the driving roll; The minimum time required for the corrugation forming stage is the sum of the two: S3. Rounding: When a complete corrugated morphology is formed in the circumferential direction of the cylinder section, the corrugated core roll no longer feeds, and the corrugated profile of the cross-section at the corrugated rolling position where the cylinder section contacts the corrugated core roll no longer changes, and the width of the cross-section becomes smaller.

2. The rolling processing method of the cylindrical sine corrugated ring rib pressure hull according to claim 1, characterized in that, The cylindrical sine corrugated ring rib pressure hull is an integrated structure obtained by continuous rolling through a cylinder section rolling device.

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