A wall panel compression stability test device

Abstract

The present invention provides a wall panel compression stability testing device, which comprises: an upper pressure plate assembly, a side support plate assembly, a lower pressure plate assembly, a corner box assembly, an adjusting rod assembly and a rib clamping assembly, wherein the upper pressure plate assembly is arranged above a test piece, the side support plates are arranged on both sides of the test piece, the lower pressure plate is arranged below the test piece, the corner box assembly is arranged between the long girders at both ends of the test piece, the corner box assembly is connected to the test piece skin by bolts, the adjusting rod assembly is arranged between the side support plate assemblies, and the rib clamping assembly is matched with the adjusting rod assembly, and an assembly relationship is formed between the components through mechanical connection. The present invention is used for testing the bearing capacity of wall panel compression stability and verifying the stability analysis method, and can ensure the uniform transmission of the compression load of the test piece and prevent additional bending moment caused by eccentric loading.

Description

[Technical field]

[0001] The invention relates to the technical field of aircraft strength testing, and in particular to a wall panel compression stability testing device. [Background technology]

[0002] Reinforced panels are a common structural form in the field of aircraft design. They are generally composed of fuselage skin and long stringers and are often selected for main load-bearing components such as fuselage, wings, tail, and doors. With the development of new aviation technologies and new materials, reinforced panels have gradually made great progress in many aspects such as the structural form, preparation process, and assembly method of panels from the initial form of riveted metal skin and long stringers. Especially in recent decades, with the maturity of advanced composite material technology and its widespread application in the aircraft field, composite reinforced panels have gradually developed towards large-size, integral, and integrated molding technology directions. For example, composite fuselage barrel sections using integral winding molding and full-size wing panels using liquid molding (RTM / LCM) technology have been used in advanced civil aircraft models.

[0003] In the preliminary design stage of the aircraft, in order to verify the load-bearing capacity and analysis method of typical stiffened wall panels, the wall panel compression stability test is one of the important components of the structural test. The traditional stiffened wall panel compression test piece end is in the form of resin potting the two ends of the test piece for clamping the test fixture. The disadvantage of this method is that once the test piece is potted, due to its overall non-detachable structure, the two loading ends of the test piece are no longer convenient for assembly and adjustment, and the flatness accuracy of the connection plane between the potting end of the large-sized test piece and the test fixture is difficult to guarantee during manufacturing; at the same time, the traditional test fixture is generally designed to mechanically connect the support plate with the rib web of the test piece to provide out-of-plane constraints on the test piece. This method requires a large number of tooling, high cost, large space occupation, and complex assembly, which is not conducive to the installation of test strain gauges and the observation of the test process.

[0004] Therefore, it is necessary to develop a wall panel compression stability test device to address the deficiencies of the prior art and to solve or alleviate one or more of the above problems. [Summary of the invention]

[0005] In view of this, the present invention provides a wall panel compression stability testing device, which is used for testing the bearing capacity of wall panel compression stability and verifying the stability analysis method, and can ensure the uniform transmission of the compression load of the test piece and prevent additional bending moment caused by eccentric loading.

[0006] On the one hand, the present invention provides a wall panel compression stability testing device, which includes: an upper pressure plate assembly, a side support plate assembly, a lower pressure plate assembly, a corner box assembly, an adjustment rod assembly and a rib clamping assembly, the upper pressure plate assembly is arranged above the test piece, the side support plates are arranged on both sides of the test piece, the lower pressure plate is arranged below the test piece, the corner box assembly is arranged between the long girders at both ends of the test piece, the corner box assembly is connected to the test piece skin by bolts, the adjustment rod assembly is arranged between the side support plate assemblies, and the rib clamping assembly is matched with the adjustment rod assembly, and the components are assembled through mechanical connections.

[0007] According to the aspects described above and any possible implementation method, an implementation method is further provided, wherein the upper pressure plate assembly includes an upper pressure plate and an upper horizontal support plate, the upper pressure plate is provided with four bolt holes and multiple rows of threaded holes, the four bolt holes are used to connect the loading actuator; the upper horizontal support plate is provided with an oblong through hole, the upper horizontal support plates include two in total, which are arranged on both sides of the upper end of the test piece, and are connected to the threaded holes of the upper pressure plate by bolts.

[0008] According to the aspects described above and any possible implementation method, an implementation method is further provided, wherein the side support plate assembly includes a side support plate and a side support bar, and the side support plate assembly includes two groups, which are respectively arranged on the left and right sides of the test piece; the side support plate is provided with multiple rows of bolt holes and oblong holes; the side support bar is provided with a row of bolt holes, and the side support bars include four groups in total, which are arranged on both sides of the left side and the right side of the test piece, and are connected to the oblong holes on the side support plate by bolts.

[0009] According to the aspects described above and any possible implementation method, an implementation method is further provided, wherein the lower pressure plate assembly includes a lower pressure plate, a lower horizontal support plate and a side fixing plate; the lower pressure plate is provided with four bolt holes and multiple rows of threaded holes, and the four bolt holes are used to connect the test bench support tooling; the lower horizontal support plate is provided with an oblong through hole, and the lower horizontal support plates include two in total, which are arranged on both sides of the lower end of the test piece and are connected to the threaded holes of the lower pressure plate by bolts; the side fixing plates include two in total, which are provided with oblong through holes, which are arranged at both ends of the side support plate and are connected to the threaded holes of the lower pressure plate by bolts.

[0010] According to the aspects described above and any possible implementation method, an implementation method is further provided, wherein the corner box assembly is composed of a plurality of crown-shaped metal corner boxes, and the connecting bolt holes between the corner box assembly and the test piece can be first made as initial holes and pre-assembled on an assembly tool, and after ensuring the flatness and parallelism requirements of the connecting end faces with the upper pressure plate assembly and the lower pressure plate assembly, final holes are drilled for final assembly to prevent the generation of additional bending moments due to assembly step differences.

[0011] According to the above aspects and any possible implementations, an implementation is further provided, wherein the side support bars in the side support assembly are in line contact with the test piece to provide a small amount of out-of-plane constraint on the test piece during compression.

[0012] According to the aspects described above and any possible implementation methods, an implementation method is further provided, wherein the adjusting rod assembly includes an adjusting rod, an axle support and a sliding sleeve, which are arranged between the side support plate assemblies to provide lateral support; the adjusting rod is a cylindrical rod structure with external threads at both ends, the axle support is a rectangular block structure with a through hole and a threaded hole, and the sliding sleeve includes a sliding sleeve and a shaft, both of which are cylindrical rod structures with shoulders, and the sliding sleeve is provided with a through hole to form a sliding motion pair with the shaft.

[0013] According to the aspects described above and any possible implementation method, an implementation method is further provided, wherein the rib clamping assembly includes a fixing clamp and a fixing belt, wherein the fixing clamp is an open groove structure, and a threaded connection through hole is opened on the upper end face, and the fixing belt is an "L"-shaped angle material or a "U"-shaped profile, which is installed in the open groove of the fixing clamp and is used to limit the out-of-plane displacement of the test piece rib; the rib clamping assembly is arranged in a matching manner on the adjusting rod assembly.

[0014] According to the aspects described above and any possible implementation method, an implementation method is further provided, wherein the rib clamping assembly can change the out-of-plane support coefficient of the test piece rib by adjusting the contact form between the fixing belt and the test piece rib, the number of the fixing clamps, and the clamping preload.

[0015] According to the aspects described above and any possible implementation method, an implementation method is further provided, wherein the adjusting rod assembly is connected to the fixing clamp in the rib clamping assembly through the shoulder shaft of the sliding sleeve, so as to realize the release of the freedom of the compression direction of the test piece by the rib clamping assembly through the moving pair of the sliding sleeve.

[0016] Compared with the prior art, the present invention can achieve the following technical effects:

[0017] 1. Connect the crown metal corner box assembly to both ends of the test piece as the test piece loading end, replacing the traditional resin potting end solution; this solution can improve the assembly of the test piece loading end and the test fixture, and easily meet the requirements of the test fixture shape and position tolerance;

[0018] 2. The crown metal corner box assembly is used as the loading end. With the advantages of easy installation and adjustment, it has strong designability and is easier to ensure the consistency between the loading end and the centroid of the test piece to prevent additional bending moment caused by eccentric loading. The stiffness gradient change of the crown metal corner box in the compression direction of the test piece is more conducive to the uniform diffusion of the compression load to the test piece, preventing premature instability, and is particularly suitable for segmented long-truss reinforced wall panels.

[0019] 3. A new type of rib clamping form is adopted to replace the traditional fixed mechanical connection form. By changing the contact form between the rib clamping assembly tooling and the test piece rib, out-of-plane constraints with different support coefficients can be provided; and the number of rib clamping assemblies is adjustable, which is convenient for disassembly and assembly and occupies little space;

[0020] 4. Design a new type of adjustment rod assembly, which can provide lateral support for the test piece fixture. At the same time, the cooperation between the sliding sleeve and the rib clamping assembly can release the freedom of the test piece rib in the compression direction. The number of sliding sleeves can be adjusted, which is light, easy to disassemble and assemble, and occupies little space.

[0021] 5. The whole set of test tooling greatly simplifies the number of tooling. The tooling design is light and concise, especially fully exposing the test piece assessment area to the field of vision, which is convenient for the installation of test measurement equipment, test data collection, and test observation.

[0022] Of course, any product implementing the present invention does not necessarily need to achieve all of the above-mentioned technical effects at the same time.

Brief Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 is a front view of a wall panel compression stability testing device provided by one embodiment of the present invention;

[0025] Figure 2 is a partial view of a wall panel compression stability test device provided by one embodiment of the present invention;

[0026] Figure 3 is an axonometric view of a side support plate assembly provided by one embodiment of the present invention;

[0027] Figure 4 is an axonometric view of a corner box assembly provided by one embodiment of the present invention;

[0028] Figure 5 is an axonometric view of an adjustment rod assembly provided by one embodiment of the present invention;

[0029] Figure 6 is an axonometric view of a rib support assembly provided by one embodiment of the present invention;

[0030] Figure 7 It is an installation diagram of a test piece and a test device provided in one embodiment of the present invention.

[0031] Among them, in the figure:

[0032] Upper pressure plate assembly 1, side support plate assembly 2, lower pressure plate assembly 3, corner box assembly 4, adjusting rod assembly 5, rib clamping assembly 6, upper pressure plate 11, upper horizontal support plate 12, side support plate 21, side support strip 22, test piece 7, lower pressure plate 31, lower horizontal support plate 32, side fixing plate 33, adjusting rod 51, shaft support 52, sliding sleeve 53, sliding sleeve 531, shaft 532, fixing clamp 61, fixing belt 62. [Specific implementation method]

[0033] In order to better understand the technical solution of the present invention, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0034] It should be clear that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0036] The purpose of the present invention is to provide a wall panel compression stability test device, specifically a compression stability test tool for a reinforced wall panel, which is used for testing the compression stability bearing capacity of the wall panel and verifying the stability analysis method, and can ensure the uniform transmission of the compression load of the test piece and prevent additional bending moment caused by eccentric loading.

[0037] A wall panel compression stability test device comprises an upper pressing plate assembly, a side support plate assembly, a lower pressing plate assembly, a corner box assembly, an adjusting rod assembly, and a rib clamping assembly, wherein the components are mechanically connected to form an assembly relationship;

[0038] Furthermore, the upper pressure plate assembly includes an upper pressure plate and an upper horizontal support plate. The upper pressure plate is provided with four bolt holes and multiple rows of threaded holes. The four bolt holes are used to connect the loading actuator; the upper horizontal support plate is provided with an oblong through hole. The upper horizontal support plates include two in total, which are arranged on both sides of the upper end of the test piece and are connected to the threaded holes of the upper pressure plate by bolts. The loading actuator is an actuating mechanism for the loading test, such as a traditional hydraulic actuator.

[0039] Further, the side support plate assembly includes a side support plate and a side support bar, and the side support plate assembly includes two groups, which are arranged on the left and right sides of the test piece; the side support plate is provided with multiple rows of bolt holes and oblong holes; the side support bar is provided with a row of bolt holes, and the side support bars include four in total, which are arranged on both sides of the left side and the right side of the test piece, and are connected to the oblong holes on the side support plate by bolts;

[0040] Further, the lower pressure plate assembly includes a lower pressure plate, a lower horizontal support plate, and a side fixing plate; the lower pressure plate is provided with four bolt holes and multiple rows of threaded holes, and the four bolt holes are used to connect the test bench support fixture; the lower horizontal support plate is provided with an oblong through hole, and the lower horizontal support plate includes two in total, which are arranged on both sides of the lower end of the test piece and are connected to the threaded holes of the lower pressure plate by bolts; the side fixing plate includes two in total, which are provided with oblong through holes, which are arranged at both ends of the side support plate and are connected to the threaded holes of the lower pressure plate by bolts;

[0041] Further, the corner box assembly is composed of a plurality of crown-shaped metal corner boxes, which are arranged between the long stringers at both ends of the test piece, and the corner box assembly is connected to the skin of the test piece by bolts to transmit the compressive load of the test piece downward;

[0042] Preferably, the connecting bolt holes between the corner box assembly and the test piece can be made into initial holes first, and pre-assembled on the assembly tooling. After ensuring the flatness and parallelism requirements of the connecting end faces with the upper pressing plate assembly and the lower pressing plate assembly, the final holes are drilled for final assembly to prevent the generation of additional bending moment caused by the assembly step difference;

[0043] Preferably, in this solution, the gap between the corner box assembly and the side support strip in the side support plate assembly in the compression direction is convenient for reasonable design to prevent the knife edge connection area of ​​the test piece from becoming unstable in advance;

[0044] Preferably, the side support bars in the side support assembly are in line contact with the test piece to provide a small amount of out-of-plane constraint on the test piece during compression;

[0045] Further, the adjusting rod assembly includes an adjusting rod, an axle support, and a sliding sleeve, which are arranged between the side support plate assemblies to provide lateral support; the adjusting rod is a cylindrical rod structure, with external threads at both ends for connection, the axle support is a rectangular block structure, with through holes and threaded holes, the sliding sleeve includes a sliding sleeve and a shaft, both of which are shouldered cylindrical rod structures, the sliding sleeve is provided with a through hole to form a sliding motion pair with the shaft;

[0046] Furthermore, the rib clamping assembly includes a fixing clamp and a fixing belt, the fixing clamp is an open groove structure, and a threaded connection through hole is opened on the upper end face, and the fixing belt includes an "L"-shaped angle material and a "U"-shaped profile, which are installed in the open groove of the fixing clamp to limit the out-of-plane displacement of the test piece rib; the rib clamping assembly is arranged in a supporting manner on the adjusting rod assembly.

[0047] Preferably, the rib clamping assembly can change the out-of-plane support coefficient of the test piece rib by adjusting the contact form between the fixing belt and the test piece rib, the number of the fixing clips, and the clamping preload;

[0048] Preferably, the adjusting rod assembly is connected to the fixing clamp in the rib clamping assembly through the shoulder shaft of the sliding sleeve, so that the rib clamping assembly can release the freedom of the compression direction of the test piece through the kinematic pair of the sliding sleeve.

[0049] As a specific example, Figure 1-Figure 7 As shown, a wall panel compression stability test device of the present invention comprises an upper pressing plate assembly 1, a side support plate assembly 2, a lower pressing plate assembly 3, a corner box assembly 4, an adjusting rod assembly 5, and a rib clamping assembly 6, and the components are mechanically connected to form an assembly relationship;

[0050] As a specific example, Figure 1 and Figure 2 As shown, the upper pressure plate assembly 1 includes an upper pressure plate 11 and an upper horizontal support plate 12. The upper pressure plate 11 is provided with four bolt holes and multiple rows of threaded holes, and the four bolt holes are used to connect the loading actuator; the upper horizontal support plate 12 is provided with an oblong through hole, and the upper horizontal support plates 12 include two in total, which are arranged on both sides of the upper end of the test piece 7 and connected to the threaded holes of the upper pressure plate 11 by bolts;

[0051] As a specific example, Figure 1 and Figure 3As shown, the side support plate assembly 2 includes a side support plate 21 and a side support bar 22. The side support plate assembly 2 includes two groups, which are arranged on the left and right sides of the test piece 7; the side support plate 21 is provided with multiple rows of bolt holes and oblong holes; the side support bar 22 is provided with a row of bolt holes, and the side support bars 22 include four in total, which are arranged on both sides of the left side and the right side of the test piece 7, and are connected to the oblong holes on the side support plate 21 by bolts;

[0052] As a specific example, Figure 1 and Figure 2 As shown, the lower pressing plate assembly 3 includes a lower pressing plate 31, a lower horizontal supporting plate 32, and a side fixing plate 33; the lower pressing plate 31 is provided with four bolt holes and multiple rows of threaded holes, and the four bolt holes are used to connect the test bench support fixture; the lower horizontal supporting plate 32 is provided with an oblong through hole, and the lower horizontal supporting plate 32 includes two in total, which are arranged at both sides of the lower end of the test piece 7 and are connected to the threaded holes of the lower pressing plate 31 by bolts; the side fixing plate 33 includes two in total, which are provided with oblong through holes, which are arranged at both ends of the side supporting plate 21 and are connected to the threaded holes of the lower pressing plate 31 by bolts;

[0053] As a specific example, Figure 1 and Figure 4 As shown, the corner box assembly 4 is composed of a plurality of crown-shaped metal corner boxes, which are arranged between the long stringers at both ends of the test piece 7. The corner box assembly 4 is connected to the skin of the test piece 7 through a screw rod, so as to transfer the compressive load of the test piece downward;

[0054] As a specific example, Figure 1 and Figure 4 As shown, the connecting bolt holes of the corner box assembly 4 and the test piece can be made into initial holes first, and pre-assembled on the assembly tooling. After ensuring the flatness and parallelism requirements of the connecting end faces of the upper pressing plate assembly 1 and the lower pressing plate assembly 3, the final holes are drilled and the final assembly is performed to prevent the generation of additional bending moment caused by the assembly step difference;

[0055] As a specific example, Figure 1 and Figure 4 As shown, in this solution, the gap between the corner box assembly 4 and the side support strip 22 in the side support plate assembly 2 in the compression direction is convenient for reasonable design to prevent the knife edge connection area of ​​the test piece from becoming unstable in advance;

[0056] As a specific example, Figure 1 and Figure 4 As shown, the side support bar 22 in the side support assembly 2 is in line contact with the test piece to provide a small amount of out-of-plane constraint on the test piece during compression;

[0057] As a specific example, Figure 5 and Figure 7 As shown, the adjusting rod assembly 5 includes an adjusting rod 51, an axle support 52, and a sliding sleeve 53, which are arranged between the side support plate assemblies 2 to provide lateral support; the adjusting rod 51 is a cylindrical rod structure with external threads at both ends for connection, the axle support 52 is a rectangular block structure with through holes and threaded holes, the sliding sleeve 53 includes a sliding sleeve and a shaft, both of which are shouldered cylindrical rod structures, the sliding sleeve 531 is provided with a through hole to form a sliding motion pair with the shaft 532;

[0058] As a specific example, Figure 6 and Figure 7 As shown, the rib clamping assembly 6 includes a fixing clamp and a fixing belt, the fixing clamp 61 is an open groove structure, and a threaded connection through hole is opened on the upper end face, and the fixing belt 62 includes an "L"-shaped angle material and a "U"-shaped profile, which are installed in the open groove of the fixing clamp 61 to limit the out-of-plane displacement and torsion of the rib of the test piece 7; the rib clamping assembly 6 is arranged on the adjusting rod assembly 5.

[0059] As a specific example, Figure 6 and Figure 7 As shown, the rib clamping assembly 6 can change the out-of-plane support coefficient of the rib of the test piece 7 by adjusting the contact form between the fixing belt 62 and the rib of the test piece 7, the number of the fixing clips 61, and the clamping preload;

[0060] As a specific example, Figure 5 , Figure 6 and Figure 7 As shown, the adjusting rod assembly 5 is connected to the fixing clamp 61 in the rib clamping assembly 6 through the shoulder shaft of the sliding sleeve 53, so as to realize the sliding motion pair formed by the sliding sleeve 53 of the rib clamping assembly 6 to release the freedom of the test piece 7 in the compression direction.

[0061] The present invention connects the two ends of the test piece through a crown metal corner box assembly as the loading end of the test piece, replacing the traditional resin potting end solution; this solution can improve the assembly of the loading end of the test piece and the test fixture, and is easy to meet the requirements of the shape and position tolerance of the test fixture; the crown metal corner box assembly is used as the loading end. With the advantages of easy installation and adjustability, it has strong designability and is easier to ensure the consistency between the loading end and the centroid of the test piece to prevent additional bending moments caused by eccentric loading; and the stiffness gradient change of the crown metal corner box in the compression direction of the test piece is more conducive to the uniform diffusion of the compression load to the test piece, preventing premature instability; the present invention adopts a new rib clamping form to replace the traditional fixed mechanical The connection form can provide out-of-plane constraints with different support coefficients by changing the contact form between the rib clamping assembly tooling and the test piece rib; and the number of rib clamping assemblies is adjustable, which is convenient for disassembly and assembly and occupies a small space; the present invention designs a new type of adjustment rod assembly, which can provide lateral support for the test piece tooling while the cooperation of its sliding sleeve and the rib clamping assembly can release the freedom of the test piece rib in the compression direction; and the number of sliding sleeves can be adjusted, which is light, easy to disassemble and occupies a small space; the whole set of test tooling of the present invention greatly simplifies the number of tooling, and the tooling design is light and concise, especially fully exposing the test piece assessment area to the field of vision, which is convenient for the installation of test measurement equipment, test data collection, and test observation.

[0062] The present invention has completed the detailed design of the structural scheme and the three-dimensional MBD design, and has completed its production, manufacturing and assembly. It has been tested and verified on relevant test pieces with excellent results.

[0063] The above is a detailed introduction to a wallboard compression stability test device provided in the embodiment of the present application. The description of the above embodiment is only used to help understand the method and core idea of ​​the present application; at the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as limiting the present application.

[0064] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different nouns to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. As mentioned throughout the specification and claims, "including" and "including" are open-ended terms, so they should be interpreted as "including / including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect. The subsequent description of the specification is a preferred embodiment of the present application, but the description is for the purpose of illustrating the general principles of the present application, and is not used to limit the scope of the present application. The scope of protection of the present application shall be subject to that defined in the attached claims.

[0065] It should also be noted that the term "includes", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0066] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0067] The above description shows and describes several preferred embodiments of the present application, but as mentioned above, it should be understood that the present application is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the application concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the present application, and should be within the scope of protection of the claims attached to the present application.

Claims

1. A wall panel compression stability test device, characterized in that: The panel compression stability test device comprises: an upper pressure plate assembly, a side support plate assembly, a lower pressure plate assembly, a corner box assembly, an adjustment rod assembly and a rib clamping assembly, wherein the upper pressure plate assembly is arranged above the test piece, the side support plates are arranged on both sides of the test piece, the lower pressure plate is arranged below the test piece, the corner box assembly is arranged between the long girders at both ends of the test piece, the corner box assembly is connected to the test piece skin by bolts, the adjustment rod assembly is arranged between the side support plate assemblies, the rib clamping assembly is matched with the adjustment rod assembly, and the components are mechanically connected to form an assembly relationship; The upper pressure plate assembly includes an upper pressure plate and an upper horizontal support plate, the upper pressure plate is provided with four bolt holes and multiple rows of threaded holes, and the four bolt holes are used to connect the loading actuator; the upper horizontal support plate is provided with an oblong through hole, and the upper horizontal support plates include two in total, which are arranged on both sides of the upper end of the test piece and connected to the threaded holes of the upper pressure plate by bolts; The side support plate assembly includes a side support plate and a side support bar, and the side support plate assembly includes two groups, which are respectively arranged on the left and right sides of the test piece; the side support plate is provided with multiple rows of bolt holes and oblong holes; the side support bar is provided with a row of bolt holes, and the side support bar includes four in total, which are arranged on both sides of the left side and the right side of the test piece, and are connected to the oblong holes on the side support plate by bolts; The lower pressure plate assembly includes a lower pressure plate, a lower horizontal support plate and a side fixing plate; the lower pressure plate is provided with four bolt holes and multiple rows of threaded holes, and the four bolt holes are used to connect the test bench support fixture; the lower horizontal support plate is provided with an oblong through hole, and the lower horizontal support plate includes two in total, which are arranged on both sides of the lower end of the test piece and are connected to the threaded holes of the lower pressure plate by bolts; the side fixing plate includes two in total, which are provided with oblong through holes, which are arranged at both ends of the side support plate and are connected to the threaded holes of the lower pressure plate by bolts; The corner box assembly is composed of a plurality of crown-shaped metal corner boxes. The connecting bolt holes between the corner box assembly and the test piece can be first made as initial holes and pre-assembled on an assembly tool. After ensuring the flatness and parallelism requirements of the connecting end faces with the upper pressure plate assembly and the lower pressure plate assembly, final holes are drilled for final assembly to prevent the generation of additional bending moments due to assembly step differences.

2. The wallboard compression stability testing device according to claim 1, characterized in that: The side support bars in the side support assembly are in line contact with the test piece to provide a small amount of out-of-plane restraint to the test piece during compression.

3. The wall panel compression stability testing device according to claim 1, characterized in that: The adjusting rod assembly includes an adjusting rod, an axle support and a sliding sleeve, which are arranged between the side support plate assemblies to provide lateral support; the adjusting rod is a cylindrical rod structure with external threads at both ends, the axle support is a rectangular block structure with through holes and threaded holes, and the sliding sleeve includes a sliding sleeve and a shaft, both of which are cylindrical rod structures with shoulders, and the sliding sleeve is provided with a through hole to form a sliding motion pair with the shaft.

4. The wallboard compression stability testing device according to claim 3, characterized in that: The rib clamping assembly includes a fixing clamp and a fixing belt. The fixing clamp is an open groove structure with a threaded connection through hole on the upper end surface. The fixing belt is an "L"-shaped angle material or a "U"-shaped profile, which is installed in the open groove of the fixing clamp and is used to limit the out-of-plane displacement of the test piece rib. The rib clamping assembly is arranged on the adjusting rod assembly.

5. The wallboard compression stability testing device according to claim 4, characterized in that: The rib clamping assembly can change the out-of-plane support coefficient of the test piece rib by adjusting the contact form between the fixing belt and the test piece rib, the number of the fixing clips, and the clamping preload.

6. The wall panel compression stability testing device according to claim 5, characterized in that: The adjusting rod assembly is connected to the fixing clamp in the rib clamping assembly through the shoulder shaft of the sliding sleeve, so that the rib clamping assembly can release the freedom of the compression direction of the test piece through the kinematic pair of the sliding sleeve.

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