Stiffened panel

Abstract

The present application relates to a stiffened panel, comprising a first skin, a second skin and a connector, wherein first stringers are provided at the top of the first skin, and second stringers are provided at the top of the second skin; the first skin is connected to the bottom of the second skin by means of the first stringers, such that the first stringers and the second stringers are distributed in a staggered manner; and the connector is connected to the first skin by means of a first transverse connecting strap or is connected to the second skin by means of a second transverse connecting strap, so as to realize the connection between the first skin or the second skin. In the present application, two connected panel layers are designed, such that a greater out-of-plane load can be borne in the direction of thickness, thereby improving the structural stability; in addition, the stringers are distributed in a staggered manner, such that load-bearing materials can be distributed more uniformly within a limited space, and thus the stress caused by the out-of-plane load is evenly transferred to the two panel layers, thereby further improving the structural stability.

Description

reinforced wall panels Cross-references

[0001] This application claims priority to Chinese application No. 2024119413851, filed on December 25, 2024. The contents of the above application are incorporated herein by reference. Technical Field

[0002] This application relates to the field of composite material wall panel design, specifically to a reinforced wall panel. Background Technology

[0003] Stiffened wall panels are a commonly used structural form in composite wall panel design. Their structure has excellent load-bearing capacity, especially when facing compressive loads, and their structural efficiency is particularly outstanding. Therefore, this structural configuration is widely used in composite wall panel design.

[0004] Common stiffened wall panels employ a single panel layer, comprising radially arranged cap-shaped stringers (stiffeners) to bear radial loads and circumferentially arranged frames to bear circumferential loads. In hyperbolic sections, where both the circumferential and radial directions are curved, the stiffened wall panel experiences out-of-plane pressure when facing radial loads. This generates a moment between the load direction and the wall panel, reducing the structural stability of the stiffened wall panel. Therefore, in hyperbolic sections, a new composite material wall panel is needed to replace the traditional single-panel stiffened wall panel to improve the structural stability of the hyperbolic section. Summary of the Invention

[0005] Technical issues

[0006] The technical problem to be solved by this application is to provide a stiffened wall panel that can improve the structural stability of a composite material wall panel with a hyperbolic segment.

[0007] Technical solution

[0008] To solve the above-mentioned technical problems, according to the embodiments of this application, a stiffened wall panel is provided, including a first skin and a second skin. A first stringer is provided on the top of the first skin, and a second stringer is provided on the top of the second skin. The first skin is connected to the bottom of the second skin through the first stringer, so that the first stringer and the second stringer are staggered.

[0009] By adopting the above technical solution, the first skin and the first girder constitute the first wall panel layer, and the second skin and the second girder constitute the second wall panel layer. This design superimposes and connects the first and second wall panel layers, resulting in a reinforced wall panel with two wall panel layers. This allows it to withstand greater out-of-plane loads in the thickness direction, thus improving structural stability. Furthermore, the staggered distribution of the girder allows for a more uniform arrangement of load-bearing materials within a limited space, ensuring that the stress caused by out-of-plane loads is evenly transferred to the two wall panel layers, further enhancing structural stability.

[0010] Optionally, the first skin can be bonded to the first stringer, the second skin can be bonded to the second stringer, the top of the first stringer can be bonded to the bottom of the second skin, and the top of the first stringer can fit into the bottom of the second skin.

[0011] By adopting the above technical solution, the first skin and the first stringer are bonded together to form the first wall panel layer, and the second skin and the second stringer are bonded together to form the second wall panel layer. The top of the first stringer is bonded to the bottom of the second skin, thereby fixing the position of the first and second wall panel layers and preventing collisions between them under out-of-plane loads, thus avoiding unnecessary wear. Furthermore, the shape of the top of the first stringer is matched to the bottom of the second skin to ensure that the first stringer can be stably bonded to the second skin.

[0012] Optionally, both the first stringer and the second stringer can be hat-shaped stringers with cavities filled with rubber.

[0013] By adopting the above technical solutions, the first and second stringers can have various shapes, such as trapezoidal stringers, A-shaped stringers, and Ω-shaped stringers. In this case, based on the cap-shaped stringer, rubber is filled into the cavity. Utilizing the cushioning properties of rubber, the local stability of the first and second stringers under compressive loads is greatly improved.

[0014] Optionally, the first stringers may be evenly distributed on the first skin, and the second stringers may be evenly distributed on the second skin.

[0015] By adopting the above technical solution, the positional distribution of the first and second stringers is set according to the required structural strength. Usually, an equal-spacing distribution is used to distribute the pressure applied by the out-of-plane load and ensure the overall structural strength.

[0016] Optionally, the reinforced wall panel may further include a connector, the connector having a first transverse connecting strip, a second transverse connecting strip, and a longitudinal vertical rib. The first transverse connecting strip has a first end, a second end, and a first fixed end. The second transverse connecting strip has a third end, a fourth end, and a second fixed end. The first fixed end and the second fixed end are fixedly connected to the longitudinal vertical rib. The first end and the second end are connected to the same first skin, and the third end and the fourth end are connected to different second skins. Alternatively, the first end and the second end are connected to different first skins, and the third end and the fourth end are connected to the same second skin.

[0017] By adopting the above technical solution, the first skin and the first stringer constitute the first wall panel layer, and the second skin and the second stringer constitute the second wall panel layer. In the case where the length of the first wall panel layer or the second wall panel layer is insufficient, this invention supports the continuation of the first wall panel layer or the second wall panel layer through connectors, thereby realizing the stiffened wall panel of this invention based on the skin with limited length. In addition, this invention also facilitates the replacement of damaged or defective first skin and second skin, thereby improving the efficiency of fault repair.

[0018] Optionally, the first end and the second end may be connected to different first skins, and the third end and the fourth end may be connected to different second skins.

[0019] By adopting the above technical solution, different first skins are connected through the first end and the second end, and different second skins are connected through the third end and the fourth end. Therefore, this invention not only supports the connection of a single first skin or second skin, but also supports the simultaneous connection of the first skin and the second skin.

[0020] Optionally, one end of the longitudinal vertical bar can be fixedly connected to the first fixed end of the first transverse connecting strip plate, and the other end of the longitudinal vertical bar extends out from the second transverse connecting strip plate, with the extension length being less than the height of the second stringer.

[0021] By adopting the above technical solution, the "earth"-shaped connector composed of the first transverse connecting strip, the second transverse connecting strip, and the longitudinal vertical rib is used as an important component for connecting the first skin, connecting the second skin, and connecting the first skin and the second skin simultaneously.

[0022] Optionally, the spacing between the first stringers, the spacing between the second stringers, and the spacing between the first stringers and the second stringers are all related to structural stress, and the length of the longitudinal reinforcement extending out of the second transverse connecting strip is related to the preset structural strength requirements.

[0023] By adopting the above technical solution, in order to ensure the structural stability of the overall stiffened wall panel, the distribution of the first and second long trusses follows the structural design principles to ensure structural stability when subjected to external forces applied by out-of-plane loads.

[0024] Optionally, the first wall panel layer formed by the first skin and the first stringer can be an integral structure, the second wall panel layer formed by the second skin and the second stringer can be an integral structure, and the connector formed by the first transverse connecting strip, the second transverse connecting strip and the longitudinal rib can be an integral metal structure. One free end of the longitudinal rib terminates at the first transverse connecting strip, and the other free end of the longitudinal rib does not exceed the top of the second stringer.

[0025] By adopting the above technical solution, the first and second wall panel layers are tended to be set as an integral structure to ensure the structural stability of the first and second wall panel layers. The connection is set as an integral structure to ensure the structural stability of the connection itself, and the connection can better connect the first and second skins.

[0026] Beneficial effects

[0027] In summary, compared with the prior art, the technical solution of this application can achieve at least the following beneficial technical effects:

[0028] 1. This project employs a structure combining double or even multiple wall panels, which significantly improves structural stability under out-of-plane loads due to the load-bearing structure formed in the thickness direction. The staggered girder arrangement allows for a more uniform distribution of load-bearing materials within a limited space. This effectively enhances the load-bearing capacity of the stiffened wall panels in the hyperboloid segment against out-of-plane loads, thereby improving structural stability.

[0029] 2. Compared to the hollow structure of the stringer, this case fills the stringer with rubber to improve the local stability of the stringer under compressive load.

[0030] 3. Compared with the "T" type connector, the "Tu" type connector in this case can effectively bear the out-of-plane load and complete the connection of the skin in the wall panel. Moreover, the connector is made of metal material in one piece. It is a profile made of a single piece of metal, which ensures the structural stability of the connector itself and allows the connector to better connect the first skin and the second skin. Attached Figure Description

[0031] Figure 1 is a schematic diagram of the forces acting on the wall panels of the straight and hyperbolic sections;

[0032] Figure 2 is a structural schematic diagram of a single-layer stiffened wall panel;

[0033] Figure 3 is an exploded view of the reinforced wall panel provided in this application;

[0034] Figure 4 is a schematic diagram of one type of reinforced wall panel in Figure 3;

[0035] Figure 5 is another schematic diagram of the stiffened wall panel in Figure 3;

[0036] Figure 6 is a schematic diagram of the long truss in Figure 4;

[0037] Figure 7 is a schematic diagram of a connector simultaneously connecting the first and second wall panel layers;

[0038] Figure 8 is another schematic diagram showing the connector simultaneously connecting the first and second wall panel layers;

[0039] Figure 9 is a schematic diagram of the connector joining the first wall panel layer;

[0040] Figure 10 is a schematic diagram of the connector joining the second wall panel layer;

[0041] Figure 11 is a structural schematic diagram of the connector. Detailed Implementation

[0042] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this application pertains. The terms "comprising" and similar expressions used herein mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, but does not exclude other elements or objects.

[0043] To address the problems of existing technologies, referring to Figure 1, conventional composite panel walls are typically configured as single-layer panels, each consisting of a skin and a stringer. In straight sections, when facing loads in the direction shown in Figure 1, the load-bearing capacity of the conventional composite panel is not significantly affected by the load because it can be approximated as a plane in the circumferential direction. In hyperbolic sections, both the circumferential and radial directions are curved surfaces. When facing loads in the direction shown in Figure 1, a moment is generated between the load direction and the composite panel, significantly reducing the structural stability and easily leading to structural failure. In a conventional case, referring to Figure 2, the composite panel is configured as a single-layer stiffened panel, comprising a skin and a stringer. The skin and stringer are bonded together, and to ensure the lightweight design of the composite panel structure, the stringer is designed to be hollow.

[0044] This application provides a reinforced wall panel, as shown in Figure 3, comprising a first skin 11 and a second skin 21. A first stringer 12 is disposed on the top of the first skin 11, and a second stringer 22 is disposed on the top of the second skin 21. The first skin 11 is bonded to the first stringer 12, and the second skin 21 is bonded to the second stringer 22. The first skin 11 is connected to the bottom of the second skin 21 via the first stringer 12, so that the first stringer 12 and the second stringer 22 are staggered.

[0045] The first skin 11 and the first girder 12 form the first wall panel layer 10, and the second skin 21 and the second girder 22 form the second wall panel layer 20. The first wall panel layer 10 and the second wall panel layer 20 are stacked and connected, resulting in a stiffened wall panel with at least two wall panel layers. This allows it to withstand greater out-of-plane loads in the thickness direction, improving structural stability. Furthermore, the staggered distribution of the first girder 12 and the second girder 22 allows for a more uniform arrangement of load-bearing materials within a limited space, ensuring that the stress caused by out-of-plane loads is evenly transferred to the first wall panel layer 10 and the second wall panel layer 20, further enhancing structural stability.

[0046] In one embodiment, referring to Figure 4, the top of the first stringer 12 is bonded to the bottom of the second skin 21, and the top of the first stringer 12 fits into the bottom of the second skin 21. This bonding of the top of the first stringer 12 to the bottom of the second skin 21 fixes the position between the first wall panel layer 10 and the second wall panel layer 20, preventing collisions between them and unnecessary wear when external forces are applied under out-of-plane loads. Furthermore, the shape of the top of the first stringer 12 matches the bottom of the second skin 21 to ensure stable bonding between the first stringer 12 and the second skin 21.

[0047] In one embodiment, referring to FIG3, the stiffened wall panel consists of two wall panel layers, a first wall panel layer 10 and a second wall panel layer 20.

[0048] In another embodiment, referring to Figure 5, the stiffened wall panel is composed of multiple wall panel layers, a first wall panel layer 10 and multiple second wall panel layers 20, with the direction from the first wall panel layer 10 to the second wall panel layer 20 from the outside to the inside. The top of the first stringer 12 of the first wall panel layer 10 is connected to the second skin 21 of the outermost second wall panel layer 20, and the second stringer 22 of the outermost second wall panel layer 20 is connected to the second skin 21 of the innermost second wall panel layer 20, realizing a multi-layer design of the overall stiffened wall panel.

[0049] In one embodiment, the spacing between the first trusses 12, the spacing between the second trusses 22, and the spacing between the first trusses 12 and the second trusses 22 are all related to structural stress.

[0050] The following explains the principle behind spacing settings:

[0051] S1, calculate the stiffness matrix and skin ply parameters of the skin with known ply information using laminated plate theory;

[0052] S2, the stringer bending stiffness parameters are obtained through skin ply parameters and preliminary stringer spacing;

[0053] S3, the tensile stiffness ratio of the stringer to the skin is obtained through the skin ply parameters;

[0054] S4. Calculate the ratio of stringer tensile stiffness to skin tensile stiffness using skin ply parameters and skin tensile stiffness ratio parameters to ensure it remains within a preset safety range.

[0055] S5, by using the stringer bending stiffness parameters and the skin stiffness matrix, combined with the simulated pre-set stiffness planning of the stiffened wall panel, obtains the necessary stiffness requirements for each first wall panel layer and the second wall panel layer. Then, by continuously adjusting the stringer spacing value in S2, the spacing between the stringers in each first wall panel layer and the second wall panel layer is obtained, that is, the spacing between the first stringers, the spacing between the second stringers, and the self-checking spacing between the first stringers and the second stringers.

[0056] Therefore, in this embodiment, in order to ensure the structural stability of the overall stiffened wall panel, the distribution of the first stringer and the second stringer both follow the structural design principles to ensure structural stability when subjected to external forces applied by out-of-plane loads.

[0057] In another example, the first stringers 12 are evenly distributed on the first skin 11, and the second stringers 22 are evenly distributed on the second skin 21. The evenly distributed second stringers 22 ensure that when an out-of-plane load is applied, the pressure can be evenly distributed to all positions of the first skin 11 and transmitted to the second skin 21 through the evenly distributed second stringers 22.

[0058] In one example, both the first stringer 12 and the second stringer 22 are cavitary cap-shaped stringers. Referring to Figure 6, such stringers include a thick outer shell 3 with an internal cavity filled with rubber blocks 4. The outer shell is Ω-shaped. In this example, the outer shell 3 can have multiple shapes, such as trapezoidal, A-shaped, square, Ω-shaped, etc. Preferably, an Ω-shaped outer shell 3 is preferred due to its superior load-bearing capacity. Rubber is injected into the cavity inside the outer shell 3, filling the cavity with rubber blocks 4 formed by the agglomeration of rubber. Utilizing the cushioning properties of rubber, the local stability of the first stringer 12 and the second stringer 22 under compressive loads is greatly improved.

[0059] In one example, referring to Figures 7 and 8, the reinforced wall panel further includes a connector 5. The connector 5 has a first transverse connecting strip 51, a second transverse connecting strip 52, and a longitudinal vertical rib 53. The first transverse connecting strip 51 has a first end, a second end, and a first fixed end. The second transverse connecting strip 52 has a third end, a fourth end, and a second fixed end. The first fixed end and the second fixed end are fixedly connected to the longitudinal vertical rib 53. The number of second transverse connecting strips 52 corresponds to the number of second skin layers 21. That is, referring to Figure 7, if there are two second wall panel layers 20, there will be two second transverse connecting strips 52; referring to Figure 8, if there are three second wall panel layers 20, there will be three second transverse connecting strips 52.

[0060] Taking a reinforced wall panel with only one first wall panel layer 10 and one second wall panel layer 20 as an example:

[0061] When the first skin 11 needs to be spliced, the first and second ends are connected to different first skins 11, and the third and fourth ends are connected to the same second skin 21. Referring to Figure 9, the splicing of the first wall panel layer 10 is supported by the connector 5. When the length of the first wall panel layer 10 is limited, the stiffened wall panel of the plan is achieved through the splicing operation. Furthermore, when using the connector 5 to connect the first skin 11 and the second skin 21, the first transverse connecting strip plate 51 is placed inside the first skin 51. Using screws, bolts, or other tools, the first end of the first transverse connecting strip plate 51 is connected to the first skin 11 on the left, the second end of the first transverse connecting strip plate is connected to the skin 11 on the right, the third end of the second transverse connecting strip plate 52 is connected to the outside of the second skin 21, and the fourth end of the second transverse connecting strip plate 52 is connected to the outside of the second skin 52. Since the first transverse connecting strip 51 and the first skin 21 are detachably connected, this invention also facilitates the replacement of the damaged or defective first skin 11, thereby improving the efficiency of fault repair.

[0062] When the second skin 21 needs to be spliced, the first and second ends are connected to the same first skin 11, while the third and fourth ends are connected to different second skins 21. Referring to Figure 10, the splicing of the second wall panel layer 20 is supported via the connector 5, thereby achieving the reinforced wall panel of this invention based on skins of limited length. When using the connector 5 to connect the first skin 11 and the second skin 21, the first transverse connecting strip 51 is placed inside the first skin 51. Using screws, bolts, or other tools, the first and second ends of the first transverse connecting strip 51 are connected to the second skin 21. The second transverse connecting strip 52 is connected to the second skin 21 on the left side via its third end, and to the second skin 21 on the right side via its fourth end. Because the second transverse connecting strip 52 and the second skin 21 are detachably connected, it is convenient to replace damaged or defective second skins 21, thereby improving fault repair efficiency.

[0063] When it is necessary to connect the first skin 11 and the second skin 21 simultaneously, the first end and the second end are connected to different first skins 11, and the third end and the fourth end are connected to different second skins 21. Referring to Figure 7, using tools such as screws and bolts, the first transverse connecting strip 51 is connected to the first skin 11 on the left side through the first end and to the second skin 12 on the right side through the second end. The second transverse connecting strip 52 is connected to the second skin 21 on the left side through the third end and to the second skin 21 on the right side through the fourth end. In this example, the first wall panel layer 10 and the second wall panel layer 20 can be connected by connecting piece 5, thereby realizing the stiffened wall panel of this case based on the skin with limited length. This case also facilitates the replacement of damaged or defective first skins 11 and second skins 21, thereby improving the efficiency of fault repair.

[0064] In some examples, referring to Figures 7 and 11, one end of the longitudinal rib 53 is fixed to the first fixed end of the first transverse connecting strip 51, and the outer free end of the longitudinal rib 53 ends at the first transverse connecting strip 51; the other end of the longitudinal rib 53 extends from the second transverse connecting strip 52, and the length of the longitudinal rib 53 extending out of the outermost second transverse connecting strip 52 is less than the height of the innermost second stringer 22, that is, the inner free end of the longitudinal rib 53 does not exceed the cap of the innermost second stringer 22.

[0065] The outer free end of the longitudinal rib 53 can be located on one side of the first transverse connecting plate 51, on the upper surface of the first transverse connecting plate 51, in a through hole in the middle of the first transverse connecting plate 51, or embedded in a limiting groove in the middle of the first transverse connecting plate 51, among other methods. The outer free end of the longitudinal rib 53 terminates at the first transverse connecting plate 51, ensuring that no protrusion occurs on the plane where the first skin 11 and the second skin 21, which are connected by the connector 5, are located. This prevents the longitudinal rib 53 from damaging the overall reinforced wall panel when external forces are applied under out-of-plane loads. It is worth mentioning that the length of the longitudinal rib 53 extending out of the innermost second transverse connecting plate 52 is related to the preset structural strength requirements of the overall reinforced wall panel in this case, to ensure structural stability when subjected to external forces applied under out-of-plane loads.

[0066] In some examples, the first wall panel layer 10, formed by the first skin 11 and the first stringer 12, is an integral structure; the second wall panel layer 20, formed by the second skin 21 and the second stringer 22, is an integral structure; and the connector 5, composed of the first transverse connecting strip 51, the second transverse connecting strip 52, and the longitudinal rib 53, is an integral metal structure. That is, the first wall panel layer 10, the second wall panel layer 20, and the connector 5 are all manufactured using an integral molding process, being machined from a single piece of metal. This ensures the structural stability of the first wall panel layer 10 and the second wall panel layer 20. The integral structure of the connector ensures its own structural stability and allows for better connection between the first skin 11 and the second skin 21.

[0067] While the embodiments of this application have been described in detail above, it will be apparent to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations fall within the scope and spirit of this application as set forth in the claims. Furthermore, the application described herein may have other embodiments and can be implemented or carried out in various ways.

Claims

1. A reinforced wall panel, comprising a first skin and a second skin, wherein a first stringer is provided on the top of the first skin and a second stringer is provided on the top of the second skin, and the first skin is connected to the bottom of the second skin through the first stringer so that the first stringer and the second stringer are staggered.

2. The framed wall panel of claim 1, wherein, The first skin is bonded to the first stringer, the second skin is bonded to the second stringer, the top of the first stringer is bonded to the bottom of the second skin, and the top of the first stringer fits into the bottom of the second skin.

3. The framed wall panel of claim 2, wherein, Both the first stringer and the second stringer are hat-shaped stringers with cavities filled with rubber.

4. The framed wall panel of claim 1, wherein, The first stringers are evenly distributed on the first skin, and the second stringers are evenly distributed on the second skin.

5. The reinforced wall panel according to claim 1, further comprising a connector having a first transverse connecting strip, a second transverse connecting strip, and a longitudinal vertical rib, wherein the first transverse connecting strip has a first end, a second end, and a first fixed end, and the second transverse connecting strip has a third end, a fourth end, and a second fixed end; wherein The first fixed end and the second fixed end are fixedly connected to the longitudinal vertical rib; The first end and the second end are connected to the same first skin, and the third end and the fourth end are connected to different second skins; or The first end and the second end are connected to different first skins, and the third end and the fourth end are connected to the same second skin.

6. The framed wall panel of claim 5, wherein, The first end and the second end are connected to different first skins, and the third end and the fourth end are connected to different second skins.

7. The reinforced wall panel according to claim 5, wherein, One end of the longitudinal vertical bar is fixedly connected to the first fixed end of the first transverse connecting strip plate, and the other end of the longitudinal vertical bar extends out from the second transverse connecting strip plate, with the extension length being less than the height of the second stringer.

8. The reinforced wall panel according to claim 5, wherein, The first transverse connecting strip is located on the side of the first skin closer to the second skin, and the second transverse connecting strip is located on the side of the second skin away from the first skin.

9. The reinforced wall panel according to claim 5, wherein, The spacing between the first trusses, the spacing between the second trusses, and the spacing between the first trusses and the second trusses are all related to structural stress, and the length of the longitudinal vertical reinforcement extending out of the second transverse connecting strip is related to the preset structural strength requirements.

10. The reinforced wall panel according to claim 5, wherein, The first wall panel layer formed by the first skin and the first stringer is an integral structure, and the second wall panel layer formed by the second skin and the second stringer is an integral structure. The connector formed by the first transverse connecting strip, the second transverse connecting strip, and the longitudinal rib is an integral metal structure. One free end of the longitudinal rib terminates at the first transverse connecting strip, and the other free end of the longitudinal rib does not exceed the top of the second stringer.

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