A casting-type split-type space station scientific experiment cabinet mechanical testing fixture

Abstract

This invention belongs to the field of ground testing equipment for scientific experiment cabinets in manned spaceflight engineering space stations. Specifically, it is a cast, split-type mechanical testing fixture for space station scientific experiment cabinets. The bottom plate, front support, and rear support are the main load-bearing and vibration transmission structures, and provide connection interfaces with the horizontal slide and vertical transition platform of the vibration table. The corner transition plate combines with the corresponding hexagonal transition parts of the experiment cabinet to realize the transition installation of the experiment cabinet with the front and rear supports. The front and rear supports are cast aluminum alloy structures. Based on multi-stage iterative structural optimization analysis, multiple reinforcing ribs, weight reduction holes, and lifting holes are provided, and the mounting holes and mounting connection surfaces are precision machined. This invention has high structural strength, a large stiffness-to-mass ratio, the number of resonance peaks of the transmission characteristics within the test frequency band meets the allowable value, the lateral movement is small, the movement of the interface surface with the test piece is uniform, it is not easily deformed during long-term placement and use, the structure and operation are simple, and it can be reused multiple times.

Description

Technical Field

[0001] This invention belongs to the field of ground test equipment for scientific experiment cabinets in manned spaceflight engineering space stations. Specifically, it is a cast split-type mechanical test fixture for space station scientific experiment cabinets, which provides ground mechanical environment test support for different scientific experiment cabinets in the space station scientific experiment module. Background Technology

[0002] The space station is a large-scale space laboratory system that operates in low Earth orbit for extended periods, capable of supporting multiple astronauts for long-term stays. Its scientific experimental modules are designed to conduct large-scale, multidisciplinary space-based scientific research experiments. Scientific experimental cabinets are the primary experimental facilities within these modules for carrying out these scientific applications. Each type of scientific experiment utilizes space science payload equipment installed on the scientific experimental cabinets within the experimental modules, providing rigorously standardized mechanical, electrical, software, thermal, hydraulic, gas, and environmental interfaces, as well as control systems and information management.

[0003] During launch, scientific experimental cabinets undergo harsh and complex mechanical environments, experiencing vibration coupling in multiple directions. Therefore, conducting ground-based mechanical environment tests simulating actual launch conditions is essential at each stage of the development process. In these ground-based mechanical environment tests, the experimental cabinets are mounted on a vibration table using mechanical testing fixtures to realistically simulate the installation method between the cabinets and space station modules. These tests, including sinusoidal and random vibration tests, assess the cabinets' environmental adaptability, evaluate their design quality, verify their manufacturing quality, and ensure their reliability. To accurately reflect the mechanical feedback of the cabinets under specific input conditions, while considering the mass of each cabinet and the load-bearing capacity of the vibration table, and maximizing the utilization efficiency and ease of disassembly of the fixtures, the fixtures must possess sufficient design stiffness, strength, and damping. They must also meet requirements such as good transmission characteristics, undistorted waveforms, minimal lateral vibration, realistic simulation of installation connections, and uniform interface surface movement. These conditions place high demands on the design of the mechanical testing fixtures. Summary of the Invention

[0004] The purpose of this invention is to provide a casting-type split-type mechanical testing fixture for space station scientific experimental cabinets to meet the requirements of ground mechanical environment testing for space station scientific experimental cabinets.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] This invention includes a bottom plate, a front support, and a rear support. The front and rear supports are respectively installed at both ends of the upper surface of the bottom plate. Each of the front and rear supports includes a main upright plate, a lower mounting plate, and side plates. The lower surface of the lower mounting plate is fixedly connected to the bottom plate and the vibration table. The upper surface of the lower mounting plate is provided with a main upright plate and side plates symmetrically located on both sides of the main upright plate. Each of the main upright plates of the front and rear supports has a corresponding adapter plate fixedly connected to the adapter on the scientific experiment cabinet. The scientific experiment cabinet is connected and installed with the front and rear supports through the adapter plates.

[0007] Wherein: the main support plate of the front is the main support plate A, the lower mounting plate is the lower mounting plate A, the side plate is the side plate A, the main support plate A has a connecting plate fixed to the side facing the rear support, the main support plate A has a reinforcing rib on the side facing away from the rear support, and the top of the main support plate A has an upper reinforcing plate A.

[0008] The front support is integrally cast from aluminum alloy. The main upright plate A and the side plates A on both sides are provided with weight reduction holes A. Each weight reduction hole A on the main upright plate A has reinforcing ribs A around its perimeter on the side facing away from the rear support.

[0009] The upper reinforcing plate A has multiple lifting holes A for providing lifting ring mounting points when transporting the front support. The main upright plate A has corner bracket mounting holes A on both sides above it. The lower mounting plate A has vibration table and bottom plate mounting holes A, which are adjustable waist-shaped holes.

[0010] The rear support consists of a main support plate (main support plate B), a lower mounting plate (lower mounting plate B), and a side plate (side plate B). A transition plate is fixed to the side of the main support plate B facing the front support. A reinforcing rib B is provided on the side of the main support plate B away from the front support. An upper reinforcing plate B is provided on the top of the main support plate B.

[0011] The rear support is integrally cast from aluminum alloy. Weight reduction holes B are provided on the main upright plate B and the side plates B on both sides. Each weight reduction hole B on the main upright plate B has reinforcing ribs B around its surrounding surface on the side facing away from the front support.

[0012] The upper reinforcing plate B has multiple lifting holes B for providing lifting ring mounting points when transporting the rear support. The upper two sides of the main upright plate B have corner bracket mounting holes B. The lower two sides of the main upright plate B have adjustable corner adapter mounting holes. The lower mounting plate B has vibration table and bottom plate mounting holes B. The vibration table and bottom plate mounting holes B are non-adjustable round holes.

[0013] The bottom plate is a square plate with a weight reduction hole C in the middle. The bottom plate is provided with a hoisting hole C, a mounting hole for connecting to the vibration table surface, and a mounting hole for connecting to the vibration table and the front or rear support. The bottom plate is connected to the front support, the rear support and the vibration table to form a whole structure.

[0014] The adapter plate is divided into an upper left corner adapter plate, an upper right corner adapter plate, a lower left corner adapter plate, a lower right corner adapter plate, a left rear corner adapter plate, and a right rear corner adapter plate. The upper left corner adapter plate and the upper right corner adapter plate are respectively connected to the upper sides of the main upright plate of the front support. The lower left corner adapter plate and the lower right corner adapter plate are respectively connected to the upper sides of the main upright plate of the rear support. The left rear corner adapter plate and the right rear corner adapter plate are respectively connected to the lower sides of the main upright plate of the rear support.

[0015] The adapter plate is a square plate, and each adapter plate is provided with a fixing hole A for connecting with the front support or the rear support and a fixing hole B for connecting with the scientific experiment cabinet.

[0016] The advantages and positive effects of this invention are as follows:

[0017] 1. This invention can reflect the mechanical characteristics of the interface of the scientific experiment cabinet installed in the space station module, thereby measuring the environmental adaptability of the experiment cabinet, evaluating the design quality of the experiment cabinet, inspecting the manufacturing quality of the product, ensuring the reliability of the product, and effectively avoiding adverse effects on the load and module caused by structural and connection problems during launch. It has outstanding features such as high structural strength, large stiffness-to-mass ratio, good transmission characteristics, reusability, and strong practicality.

[0018] 2. The present invention is designed with a split, adjustable U-shaped structure to adapt to different envelope sizes, structures, weights, and installation interface requirements of various scientific experimental cabinets. Compared with the integral fixture, it has the advantages of convenient installation and disassembly, good adaptability, and strong practicality. The split fixture can perform various mechanical tests such as sinusoidal vibration, random vibration, swept frequency vibration, and fixed frequency vibration in the X, Y, and Z directions according to different levels of test input conditions.

[0019] 3. The front and rear supports of this invention adopt an integral casting structure and are equipped with reinforcing ribs. Non-installation interfaces are not machined. Compared with screw-on and welded fixtures, this effectively increases and enhances the rigidity and damping of the fixture, ensuring that the fixture has a high fundamental frequency. Furthermore, the number of resonant peaks of the transmission characteristics in the test frequency band meets the allowable value, the lateral vibration is small, and the interface surface with the test piece moves uniformly, thus meeting the test requirements. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a top view of the structure of the present invention;

[0022] Figure 3 This is a three-dimensional structural diagram of the front support of the present invention;

[0023] Figure 4 This is a rear view of the front support structure of the present invention;

[0024] Figure 5 This is one of the three-dimensional structural diagrams of the rear support of the present invention;

[0025] Figure 6 This is the second three-dimensional structural diagram of the rear support of the present invention;

[0026] Figure 7 This is a schematic diagram of the bottom plate of the present invention;

[0027] Figure 8 This is a schematic diagram of the structure of the adapter plate in the upper left corner of the present invention;

[0028] Figure 9 A schematic diagram illustrating the installation of the scientific experiment cabinet and corner adapter plate;

[0029] Figure 10 This is a schematic diagram of the installation of the present invention and the scientific experimental cabinet on a vibration table;

[0030] Wherein: 1 is the mechanical testing fixture for the cast split-type space station scientific experiment cabinet; 11 is the bottom plate; 111 is the hoisting hole C; 112 is the mounting hole for the vibration table; 113 is the mounting hole for the vibration table and the front or rear support; 114 is the weight reduction hole C; 12 is the front support; 121 is the hoisting hole A; 122 is the weight reduction hole A; 123 is the mounting hole A for the vibration table and the bottom plate; 124 is the mounting hole A for the corner plate; 125 is the reinforcing rib A; 126 is the upper reinforcing plate A; 127 is the lower mounting plate A; 128 is the main upright plate A; 129 is the side plate A; 13 is the rear support; 130 is the upper reinforcing plate B; 131 is the hoisting hole B; 132 is the weight reduction hole B; 133 is the mounting hole B for the vibration table and the bottom plate; 134 is the mounting hole for the corner plate. B, 135 is reinforcing rib B, 136 is adjustable angle adapter plate mounting hole, 137 is lower mounting plate B, 138 is main upright plate B, 139 is side plate B, 14 is upper left corner adapter plate, 141 is fixing hole for connection with front support, 142 is fixing hole for connection with upper left corner connector of experimental cabinet, 15 is upper right corner adapter plate, 16 is lower left corner adapter plate, 17 is lower right corner adapter plate, 18 is left rear corner adapter plate, 19 is right rear corner adapter plate, 2 is scientific experimental cabinet, 21 is upper left corner mounting interface of experimental cabinet, 22 is upper right corner mounting interface of experimental cabinet, 23 is lower left corner mounting interface of experimental cabinet, 24 is lower right corner mounting interface of experimental cabinet, 25 is left rear corner mounting interface of experimental cabinet, 26 is right rear corner mounting interface of experimental cabinet, 2 is scientific experimental cabinet, 3 is vibration table. Detailed Implementation

[0031] The invention will now be described in further detail with reference to the accompanying drawings.

[0032] like Figure 1 , Figure 2 As shown, the present invention includes a bottom plate 11, a front support 12, and a rear support 13. The front support 12 and the rear support 13 are respectively installed at both ends of the upper surface of the bottom plate 11. Both the front support 12 and the rear support 13 include a main upright plate, a lower mounting plate, and side plates. The lower surface of the lower mounting plate is fixedly connected to the bottom plate 11 and the vibration table 3. The upper surface of the lower mounting plate is provided with a main upright plate and side plates symmetrically located on both sides of the main upright plate. The main upright plate of the front support 12 is parallel to the main upright plate of the rear support 13, and the side plates on both sides of the main upright plate are symmetrically arranged. A transition plate corresponding to the transition piece on the scientific experiment cabinet 2 is fixedly connected to the main upright plate of both the front support 12 and the rear support 13. The scientific experiment cabinet 2 is connected and installed with the front support 12 and the rear support 13 through the transition plate.

[0033] like Figures 1-4As shown, in this embodiment, the main upright plate of the front support 12 is the main upright plate A128, the lower mounting plate is the lower mounting plate A127, and the side plate is the side plate A129. A transition plate is fixed to the side of the main upright plate A128 facing the rear support 13. A reinforcing rib 125 is provided on the side of the main upright plate A128 facing away from the rear support 13. An upper reinforcing plate A126 is provided on the top of the main upright plate A128. In this embodiment, the front support 12 is integrally cast from aluminum alloy. Weight reduction holes A122 are provided on the main upright plate A128 and the side plates A129 on both sides. Each weight reduction hole A122 on the main upright plate A128 has a reinforcing rib A125 around its perimeter on the side facing away from the rear support 13. The reinforcing ribs A125 in this embodiment include vertical ribs and horizontal ribs. The weight-reducing holes A122 on the main upright plate A128 are arranged in a matrix. Each weight-reducing hole A122 on the main upright plate A128 has vertical ribs and horizontal ribs on all four sides of the side facing away from the rear support 13.

[0034] In this embodiment, the upper reinforcing plate A126 has multiple lifting holes A121, which provide lifting ring mounting points for transporting the front support 12. The lower mounting plate A127 has multiple vibration table and bottom plate mounting holes A123. In this embodiment, the vibration table and bottom plate mounting holes A123 are adjustable oblong holes, which allow adjustment of the installation position between the front support 12, the bottom plate 11, and the vibration table 3. Corner fitting mounting holes A124 are provided on both sides above the main upright plate A128. The weight reduction hole A122 on the main upright plate A128 is located between the corner fitting mounting holes A124 on both sides. The corner fitting mounting holes A124 provide mechanical interfaces for corresponding corner connectors for the scientific experiment cabinet 2, which are connected to the table surface of the vibration table 3 through the vibration table and bottom plate mounting holes A123 on the lower mounting plate A127.

[0035] like Figure 1 , Figure 2 and Figure 5 , Figure 6 As shown, in this embodiment, the rear support 13 has a main upright plate B138, a lower mounting plate B137, and side plates B139. A transition plate is fixed to the side of the main upright plate B138 facing the front support 12. A reinforcing rib B135 is provided on the side of the main upright plate B138 facing away from the front support 12. An upper reinforcing plate B130 is provided on the top of the main upright plate B138. The rear support in this embodiment is integrally cast from aluminum alloy. Weight-reducing holes B132 are provided on the main upright plate B138 and the side plates B139 on both sides. Each weight-reducing hole B132 on the main upright plate B138 has reinforcing ribs B135 around its perimeter on the side facing away from the front support 12. The reinforcing rib B135 in this embodiment includes vertical ribs and horizontal ribs. The weight-reducing holes B132 on the main upright plate B138 are arranged in a matrix. Each weight-reducing hole B132 on the main upright plate B138 has vertical ribs and horizontal ribs around the side facing away from the front support 12.

[0036] In this embodiment, the upper reinforcing plate B130 has multiple lifting holes B131, which provide lifting ring mounting points when transporting the rear support 13. The lower mounting plate B137 has multiple vibration table and bottom plate mounting holes B133. In this embodiment, the vibration table and bottom plate mounting holes B133 are non-adjustable round holes. Corner fitting mounting holes B134 are provided on both sides above the main upright plate B138, and adjustable corner adapter plate mounting holes 136 are provided on both sides below the main upright plate B138. The weight-reducing holes B132 on the main upright plate B138 are located between the corner fitting mounting holes B134 and the adjustable corner adapter plate mounting holes 136. The corner fitting mounting holes B134 provide mechanical interfaces for the corresponding corner fittings of the scientific experiment cabinet 2, connecting it to the table surface of the vibration table 3 via the vibration table and bottom plate mounting holes B133 on the lower mounting plate B137.

[0037] Considering the load-bearing capacity of the vibration table 3, and to ensure that the mechanical testing fixture of the scientific experimental cabinet has sufficient strength and high rigidity, the front support 12 and the rear support 13 were structurally optimized. Based on the optimization analysis results, the overall structural layout, connection relationship and distribution of horizontal and vertical ribs of the fixture were optimized.

[0038] The bottom flat plate 11 is a square plate, such as Figure 1 , Figure 2 and Figure 7 As shown, the bottom plate 11 in this embodiment is a rectangular plate with a weight-reducing hole C114 in the middle. The bottom plate 11 has a hoisting hole C111, a vibration table mounting hole 112 for connecting to the vibration table 3, and a mounting hole 113 for connecting to the vibration table and the front or rear support. The bottom plate 11 is connected to the front support 12, the rear support 13, and the vibration table 3 to form a structural unit with higher rigidity. The bottom plate 11 in this embodiment is manufactured using a forging and precision machining process, resulting in high flatness. This ensures the flatness requirements of the vibration dynamic horizontal slide table and eliminates the need for use during vertical (Z-axis) vibration, accommodating the load-bearing capacity of a small-scale vibration table and meeting the testing requirements of the vibration table 3.

[0039] like Figure 1 , Figure 2As shown, the adapter plate is divided into an upper left corner adapter plate 14, an upper right corner adapter plate 15, a lower left corner adapter plate 16, a lower right corner adapter plate 17, a left rear corner adapter plate 18, and a right rear corner adapter plate 19. The upper left corner adapter plate 14 and the upper right corner adapter plate 15 are respectively connected to the corner adapter plate mounting holes A124 on both sides of the upper part of the main upright plate A128 of the front support 12. The lower left corner adapter plate 16 and the lower right corner adapter plate 17 are respectively connected to the corner adapter plate mounting holes B134 on both sides of the upper part of the main upright plate B138 of the rear support 13. The left rear corner adapter plate 18 and the right rear corner adapter plate 19 are respectively connected to the adjustable corner adapter plate mounting holes 136 on both sides of the lower part of the main upright plate B138 of the rear support 13. In this embodiment, all adapter plates have the same shape and structure, all being square plates. Each adapter plate has a fixing hole A for connecting with the front support 12 or the rear support 13, and a fixing hole B for connecting with the scientific experiment cabinet 2. Figure 8 As shown, taking the upper left corner adapter plate 14 as an example, the fixing hole A on the upper left corner adapter plate 14 is the fixing hole 141 for connecting with the front support, and the fixing hole B is the fixing hole 142 for connecting with the upper left corner connector of the experimental cabinet. The upper left corner adapter plate 14 is first connected to the scientific experimental cabinet 2 through the fixing hole 142 for connecting with the upper left corner connector of the experimental cabinet. After all six corner adapter plates are connected to the scientific experimental cabinet 2 and leveled, the experimental cabinet experimental components are assembled.

[0040] like Figure 9 As shown, the experimental cabinet assembly is connected to the front support 12 via the fixing holes 141. Once all six corner adapter plates are connected to the front support 12 and the rear support 13, the scientific experimental cabinet 2 is installed and fixed on the fixture. Specifically, the upper left corner adapter plate 14 on the front support 12 is fixed to the upper left corner mounting interface 21 of the experimental cabinet; the upper right corner adapter plate 15 on the front support 12 is fixed to the upper right corner mounting interface 22 of the experimental cabinet; the lower left corner adapter plate 16 on the rear support 13 is fixed to the lower left corner mounting interface 23 of the experimental cabinet; the lower right corner adapter plate 17 on the rear support 13 is fixed to the lower right corner mounting interface 24 of the experimental cabinet; the left rear corner adapter plate 18 on the rear support 13 is fixed to the left rear corner mounting interface 25 of the experimental cabinet; and the right rear corner adapter plate 19 on the rear support 13 is fixed to the right rear corner mounting interface 26 of the experimental cabinet.

[0041] The working principle of this invention is as follows:

[0042] like Figure 10As shown, this invention provides a cast-type split-type mechanical testing fixture 1 for space station scientific experimental cabinets, used for conducting ground mechanical tests on multiple scientific experimental cabinets on the space station. The testing fixture is designed as a split, adjustable U-shaped structure (i.e., the bottom plate 11 and the front supports 12 and rear supports 13 at both ends are U-shaped) to adapt to the different envelope dimensions, structures, and installation interface requirements of each experimental cabinet. Compared with an integral fixture, it has the advantages of convenient installation and disassembly, good adaptability, and strong practicality. The front supports 12 and rear supports 13 are respectively set at both ends of the upper surface of the bottom plate 11. The bottom plate 11, the front supports 12, and the rear supports 13 are the main load-bearing and vibration transmission structures. The bottom plate 11 is also connected to the front supports 12, the rear supports 13, and the table surface of the vibration table 3, forming a whole structure. The combination of the six-corner adapter plate and the corresponding hexagonal adapter piece of the scientific experiment cabinet 2 can realize the transfer installation of the scientific experiment cabinet 2 with the front support 12 and the rear support 13. After all the six-corner adapter plates are connected to the scientific experiment cabinet 2 and leveled, the structure composed of the scientific experiment cabinet 2 and the six-corner adapter plates is installed on the overall structure composed of the bottom plate 11, the front support 12 and the rear support 13. Adjust the mounting hole positions of the front support 12, the bottom plate 11 and the vibration table 3 to complete the fixed installation of the scientific experiment cabinet 2 on the vibration table 3.

[0043] This invention features high structural strength and a large stiffness-to-mass ratio. The number of resonance peaks in the transmission characteristics within the test frequency band meets the allowable value, with minimal lateral movement and uniform movement at the interface with the test piece. It is not easily deformed during long-term placement and use. The structure and operation are simple, and it can be reused multiple times. It is highly practical and adaptable to the structural size envelope and mass requirements of various scientific experiment cabinets in the three modules of the space station. It can perform various mechanical tests such as sinusoidal vibration, random vibration, and fixed-frequency vibration in the X, Y, and Z directions according to different magnitude test input conditions.

[0044] The above description is merely an embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, extensions, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A casting-type split-type space station scientific experiment cabinet mechanical testing fixture, characterized in that: It includes a bottom plate (11), a front support (12) and a rear support (13), wherein the front support (12) and the rear support (13) are respectively installed at both ends of the upper surface of the bottom plate (11). The front support (12) and the rear support (13) each include a main plate, a lower mounting plate and a side plate. The lower surface of the lower mounting plate is fixed to the bottom plate (11) and the vibration table (3). The upper surface of the lower mounting plate is provided with a main plate and side plates symmetrically located on both sides of the main plate. The main plates of the front support (12) and the rear support (13) are each fixed with a transition plate corresponding to the transition piece on the scientific experiment cabinet (2). The scientific experiment cabinet (2) is connected to the front support (12) and the rear support (13) through the transition plate. The front support (12) has a main upright plate A (128), a lower mounting plate A (127), and a side plate A (129). The side of the main upright plate A (128) facing the rear support (13) is fixed with a transition plate. The side of the main upright plate A (128) facing away from the rear support (13) is provided with a reinforcing rib A (125). The top of the main upright plate A (128) is provided with an upper reinforcing plate A (126). The upper reinforcing plate A (126) is provided with a plurality of lifting holes A (121) for providing lifting ring mounting points when transporting the front support (12). The upper sides of the main upright plate A (128) are provided with corner component mounting holes A (124). The lower mounting plate A (127) is provided with vibration table and bottom plate mounting holes A (123). The vibration table and bottom plate mounting holes A (123) are adjustable waist-shaped holes. The rear support (13) has a main upright plate B (138), a lower mounting plate B (137), and a side plate B (139). The side of the main upright plate B (138) facing the front support (12) is fixed with a transition plate. The side of the main upright plate B (138) away from the front support (12) is provided with a reinforcing rib B (135). The top of the main upright plate B (138) is provided with an upper reinforcing plate B (130). The upper reinforcing plate B (130) is provided with multiple lifting holes B (131) for providing lifting ring mounting points when transporting the rear support (13). The upper sides of the main upright plate B (138) are provided with corner component mounting holes B (134). The lower sides of the main upright plate B (138) are provided with adjustable corner adapter mounting holes (136). The lower mounting plate B (137) is provided with vibration table and bottom plate mounting holes B (133). The vibration table and bottom plate mounting holes B (133) are non-adjustable round holes.

2. The mechanical testing fixture for the cast split-type space station scientific experiment cabinet according to claim 1, characterized in that: The front support (12) is integrally cast from aluminum alloy. The main plate A (128) and the side plates A (129) on both sides are provided with weight reduction holes A (122). Each weight reduction hole A (122) on the main plate A (128) is provided with reinforcing ribs A (125) around the side facing away from the rear support (13).

3. The mechanical testing fixture for the cast split-type space station scientific experiment cabinet according to claim 1, characterized in that: The rear support is integrally cast from aluminum alloy. The main plate B (138) and the side plates B (139) on both sides are provided with weight reduction holes B (132). Each weight reduction hole B (132) on the main plate B (138) is provided with reinforcing ribs B (135) around the side facing away from the front support (12).

4. The mechanical testing fixture for the cast split-type space station scientific experiment cabinet according to claim 1, characterized in that: The bottom plate (11) is a square plate with a weight reduction hole C (114) in the middle. The bottom plate (11) is provided with a hoisting hole C (111), a vibration table mounting hole (112) for connecting with the vibration table (3) table surface, and a vibration table and front support or rear support mounting hole (113). The bottom plate (11) is connected to the front support (12), the rear support (13) and the vibration table (3) to form a structural whole.

5. The mechanical testing fixture for the cast split-type space station scientific experiment cabinet according to claim 1, characterized in that: The adapter plate is divided into an upper left corner adapter plate (14), an upper right corner adapter plate (15), a lower left corner adapter plate (16), a lower right corner adapter plate (17), a left rear corner adapter plate (18), and a right rear corner adapter plate (19). The upper left corner adapter plate (14) and the upper right corner adapter plate (15) are respectively connected to the upper sides of the main upright plate of the front support (12). The lower left corner adapter plate (16) and the lower right corner adapter plate (17) are respectively connected to the upper sides of the main upright plate of the rear support (13). The left rear corner adapter plate (18) and the right rear corner adapter plate (19) are respectively connected to the lower sides of the main upright plate of the rear support (13).

6. The mechanical testing fixture for the cast split-type space station scientific experiment cabinet according to claim 1, characterized in that: The adapter plate is a square plate, and each adapter plate is provided with a fixing hole A for connecting with the front support (12) or the rear support (13) and a fixing hole B for connecting with the scientific experiment cabinet (2).

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