Curved grid wing multi-directional load loading test device

Abstract

The present invention provides a multi-directional load-loading test device for a curved grid wing, comprising a connecting rod mechanism, a single ear, and a bearing member; the connecting rod mechanism is arranged through both ends of the grid wing; the single ear is arranged at one end of the grid wing, and one end of the single ear is connected to one end of the connecting rod mechanism, and the other end of the single ear is used to apply the load; the bearing member is arranged at the other end of the grid wing, and one end of the bearing member is connected to the other end of the connecting rod mechanism, and the other end of the bearing member is used to apply the load. The connecting rod mechanism fits the grid wing, and the force applied to the single ear and the bearing member is transmitted in different directions through the connecting rod mechanism. The force transmission of the test device is improved by optimizing the design configuration, and the whole is connected into a connecting rod mechanism that can be adjusted to each other by bolt connection, so as to ensure that the grid of the grid wing is subjected to uniform force, so as to meet the requirements of applying multi-directional loads to the curved grid wing.

Description

Technical Field

[0001] The present invention relates to the field of missile structure tests, and in particular to a multi-directional load loading test device for a curved grid wing. Background Art

[0002] As the performance of missile-body grid fins continues to improve, the load-bearing requirements for these structures are becoming increasingly stringent. Not only is the magnitude of the load-bearing capacity increasing, but also, to ensure a truly comprehensive assessment of the structure, the need for multi-directional coupled loading tests on the grid fins during ground-based simulated load conditions is increasing. Therefore, it is necessary to determine the test loading method and test device configuration based on the currently developed grid fin structure and the load conditions encountered during service.

[0003] Patent document CN108238282B discloses a central wing box test device, comprising a test piece, a test piece support system, a simulated sidewall panel support system, a simulated fuselage frame support system, a simulated floor beam support system, and an outer wing loading system. This device enables comprehensive testing and assessment of the central wing box's strength, realistically simulating the boundary conditions and stress state of the central wing box within the fuselage. However, this device still fails to meet the testing requirements for multi-directional load coupling on grid wings, particularly for curved grid wing structures, making rapid and effective adaptive adjustments even more difficult. Summary of the Invention

[0004] In view of the defects in the prior art, the purpose of the present invention is to provide a multi-directional load loading test device for a curved grid wing. According to the grid wing and loading requirements, and through simulation analysis, the specific configuration and dimensions of the test device are designed in detail. This device can realize the simultaneous loading of multi-directional loads on the curved grid wing.

[0005] A multi-directional load loading test device for a curved grid wing provided by the present invention comprises a connecting rod mechanism, a single ear, and a bearing member;

[0006] The connecting rod mechanism is arranged through both ends of the grid wing;

[0007] The single ear is arranged at one end of the grid wing, and one end of the single ear is connected to one end of the connecting rod mechanism, and the other end of the single ear is used to apply load;

[0008] The bearing member is arranged at the other end of the grid wing, and one end of the bearing member is connected to the other end of the connecting rod mechanism, and the other end of the bearing member is used to apply load.

[0009] The connecting rod mechanism is fitted with the grid wing, and the force applied to the single ear and the bearing member is transmitted in different directions through the connecting rod mechanism.

[0010] Preferably, the single ear and the supporting member are on the same axis.

[0011] Preferably, the grid wing further comprises a steel wire rope, one end of which is connected to the single ear and the other end is connected to the bearing member. The steel wire rope is used to apply loads in the Y and Z directions to the grid wing, and the single ear is used to apply loads in the X direction to the grid wing.

[0012] Preferably, the connecting rod mechanism includes a blocking block, a connecting plate, a connecting piece, and a pulling plate;

[0013] The blocking blocks are arranged through both ends of the grid wing;

[0014] The two ends of the blocking block are movably connected to the connecting plate through connecting pieces;

[0015] The connecting plate and the pulling plate are movably connected via a connecting piece;

[0016] The single ear is arranged at one end of the grid wing, and one end of the single ear is connected to the pull plate;

[0017] The bearing member is arranged at the other end of the grid wing, and one end of the bearing member is connected to the pull plate.

[0018] Preferably, the blocking block, connecting plate, and pull plate are arranged sequentially from the inside out on the outer sides of both ends of the grid vane and are movably connected by connectors to enable the blocking block, the connecting plate, and the pull plate to rotate relative to each other. Specifically, both ends of the blocking block are connected by the connecting plate, connecting bolts, and pull plate, and the connection method and combination of connectors are the same.

[0019] Preferably, one end of the blocking block is arranged in contact with the grid wing and covers the grid of the grid wing to achieve force transmission; the other end of the blocking block passes through the grid of the grid wing.

[0020] The block has first threaded holes at both ends, with their centerlines aligned on the same axis. This axis coincides with the centerline of the block's end that passes through the grid, preventing eccentricity when applying Y and Z loads. Specifically, one end of the block is designed to conform to the grid wing's grid structure, based on the grid location to be loaded. This end is larger than the grid wing's grid, allowing the block to transmit X-direction force through the grid wing's fit. The other end is smaller than the grid wing's grid structure, allowing it to pass through the grid.

[0021] The connecting plate has first through-holes at both ends and a second threaded hole in the middle. The connecting plate and the blocking block are movably connected via the connecting piece, enabling the blocking block and the connecting plate to rotate relative to each other. Specifically, the first through-holes at both ends of the connecting plate are larger in diameter than the first threaded holes in the blocking block. The connection between the connecting plate and the blocking block via the connecting piece is not rigid, ensuring relative rotation between the blocking block and the connecting plate.

[0022] Preferably, the pull plate has second through holes at both ends and a third threaded hole in the middle. The pull plate and the connecting plate are connected via the connecting member, enabling the connecting plate and the pull plate to rotate relative to each other. Specifically, the second through holes at both ends of the pull plate are larger than the second threaded holes on the connecting plate. The bolts are not tightly connected to the pull plate and the connecting plate, ensuring relative rotation between the connecting plate and the pull plate.

[0023] Preferably, one end of the single ear is connected to the pull plate through a third threaded hole on the pull plate on one side of the grid wing; one end of the bearing member is connected to the pull plate through a third threaded hole on the other side of the grid wing.

[0024] Preferably, the linkage mechanism is installed within the four grids of the grid wing; there are four blocking blocks, four connecting plates, and two pull plates; the distance between the first through-holes at both ends of the connecting plates is equal to the distance between the centers of two adjacent grids; and the distance between the second through-holes at both ends of the pull plates is equal to the distance between the centers of two adjacent grids. The blocking blocks, connecting plates, and pull plates are connected together by the connecting members to form a mutually rotatable linkage mechanism. When subjected to Y and Z-direction tension from the wire rope, the positions of the blocking blocks, connecting plates, and pull plates adjust to ensure uniform transmission of the force to the grid wing grids.

[0025] Preferably, the bearing member is a bearing bolt or other member that can achieve the same bearing effect.

[0026] Preferably, the connecting member may be a connecting bolt or other member that can achieve the same connection effect.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention improves the force transmission of the test device by optimizing the design configuration, and uses bolt connections to connect the entire device into a mutually adjustable connecting rod mechanism, ensuring that the four grids of the grid wing are evenly stressed to meet the requirements of applying multi-directional loads to the curved grid wing.

[0029] 2. This invention ensures efficient and safe testing while obtaining accurate and sufficient test data. Relying on the test data, we can fully understand the strength variation process of each part of the structure and solve the structural design and strength assessment problems in model development.

[0030] 3. The test device of the present invention has a simple structure, convenient test process operation, accurate simulation, repeatable application and flexible design of multiple specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0032] Figure 1 Schematic diagram of the grid surface structure of the multi-directional load loading test device for the curved grid wing of the present invention;

[0033] Figure 2 This is a side structural diagram of the multi-directional load loading test device for a curved grid wing according to the present invention;

[0034] Figure 3 Schematic diagram of another grid surface structure of the multi-directional load loading test device for the curved grid wing of the present invention;

[0035] Figure 4 This is a schematic diagram of the structure of the present invention applied to a curved grid wing;

[0036] Figure 5 Schematic diagram of applying tension in three directions, X, Y, and Z, to the grid wing by the present invention;

[0037] Figure 6 The structural schematic diagram of the block 1 of the multi-directional load loading test device for the curved grid wing of the present invention is shown in the figure:

[0038] Block 1, connecting plate 2, connecting bolt 3, pull plate 4, single ear 5, grid wing 6, load-bearing bolt 7, wire rope 8 DETAILED DESCRIPTION

[0039] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0040] The present invention provides a multi-directional load-applying test device for a curved grid wing 6, comprising a connecting rod mechanism, a single ear 5, and a load-bearing member. The connecting rod mechanism is disposed throughout both ends of the grid wing 6. The single ear 5 is disposed at one end of the grid wing 6, one end of which is connected to one end of the connecting rod mechanism, while the other end of the single ear 5 is used to apply the load. The load-bearing member is disposed at the other end of the grid wing 6, one end of which is connected to the other end of the connecting rod mechanism, while the other end of the load-bearing member is used to apply the load. The connecting rod mechanism is in close contact with the grid wing 6, and the force applied to the single ear 5 and the load-bearing member is transmitted in different directions through the connecting rod mechanism.

[0041] Specifically, if Figure 5As shown, the load is applied by connecting one end of the wire rope 8 to the single ear 5 and the other end to the load-bearing member, and the single ear 5 and the load-bearing member are on the same axis; the loads Fy and Fz in the Y and Z directions of the grid wing 6 are applied by the wire rope 8, and the load Fx in the X direction of the grid wing 6 is applied through the hole on the single ear 5.

[0042] The connecting rod mechanism includes a block 1, a connecting plate 2, a connector, and a pull plate 4. The block 1 is arranged to pass through both ends of the grid wing 6. The two ends of the block 1 are movably connected to the connecting plate 2 through a connector. The connecting plate 2 is movably connected to the pull plate 4 through a connector. A single ear 5 is arranged at one end of the grid wing 6, and one end of the single ear 5 is connected to the pull plate 4. A bearing member is arranged at the other end of the grid wing 6, and one end of the bearing member is connected to the pull plate 4. Specifically, one end of the block 1 is arranged to fit the grid wing 6 and cover the grid of the grid wing 6, and the other end of the block 1 passes through the grid of the grid wing 6 to achieve force transmission. In this embodiment, the specific configuration and size of the test device are designed in detail according to the grid wing 6 and the loading requirements, and through simulation analysis, so that the block 1 is suitable for grid wings of different configurations. Specifically, one end of the block 1 is designed to be in contact with the grid wing 6 through a grid-like design, and this end is larger than the grid of the grid wing 6. The transmission of X-direction force is achieved through the contact between the grid wing 6 and the block 1.

[0043] In particular, in this embodiment, if Figure 1-4 As shown, the bearing member adopts a bearing bolt component, and the connecting member adopts a connecting bolt component. Specifically, both ends of the block 1 are connected by a connecting plate 2, a connecting bolt 3, and a pull plate 4, and the connection method and the combination of the connecting members are the same. Specifically, as Figure 6 As shown, a first threaded hole is provided at both ends of the block 1, and the center lines of the first threaded holes at both ends are on the same axis, which coincides with the center line of one end of the block 1 passing through the grid. A first through hole is provided at both ends of the connecting plate 2, and a second threaded hole is provided in the middle. The first through holes at both ends of the connecting plate 2 are larger than the aperture of the first threaded hole on the block 1. The connecting plate 2 and the block 1 are movably connected by connecting bolts 3, so that the block 1 and the connecting plate 2 can rotate relative to each other. A second through hole is provided at both ends of the pull plate 4, and a third threaded hole is provided in the middle. The second through holes at both ends of the pull plate 4 are larger than the aperture of the second threaded hole on the connecting plate 2. The pull plate 4 and the connecting plate 2 are connected by connecting bolts 3, so that the connecting plate 2 and the pull plate 4 can rotate relative to each other. One end of the single ear 5 is connected to the pull plate 4 through the third threaded hole; one end of the load-bearing bolt 7 is connected to the pull plate 4 through another third threaded hole.

[0044] In this embodiment, a linkage mechanism is installed within the four grids of the grid wing 6. Four blocking blocks 1, four connecting plates 2, and two pull plates 4 are provided. The distance between the first through-holes at either end of the connecting plate 2 is equal to the distance between the centers of two adjacent loaded grids; the distance between the second through-holes at either end of the pull plate 4 is equal to the distance between the centers of two adjacent loaded grids. By optimizing the design configuration, the test apparatus's force transmission is improved, and bolts are used to connect the entire structure into a mutually adjustable linkage mechanism, ensuring uniform force distribution across the four grids of the grid wing 6 and meeting the multi-directional load requirements of the curved grid wing 6.

[0045] The working principle of this embodiment is as follows:

[0046] Figure 1 Schematic diagram of the grid surface structure of the multi-directional load loading test device of the curved grid wing 6 of the present invention, including a block 1, a connecting plate 2, a connecting bolt 3, a pull plate 4, a single ear 5, a load-bearing bolt 7, and a steel wire rope 8, wherein the block 1 is inserted into the grid of the grid wing 6, and the two ends of the block 1 are connected in pairs through the connecting plate 2 and the connecting bolt 3, but not tightened, to ensure the mutual rotation between the block 1 and the connecting plate 2; the connecting plates 2 are connected in pairs through the connecting bolt 3 and the pull plate 4, but not tightened, to ensure the mutual rotation between the connecting plate 2 and the pull plate 4; one end of the single ear 5 is connected to the pull plate 4 through a third threaded hole, and the other end is used to apply load; one end of the load-bearing bolt 7 is connected to the pull plate 4 through another third thread, and the other end is extended to apply load; as shown Figure 5 As shown, a steel wire rope 8 is connected at one end to a single lug 5 and at the other end to a load-bearing bolt 7. Loads are applied to the grid wing 6 in the Y and Z directions via the steel wire rope 8, while loads are applied to the grid wing 6 in the X direction via the holes in the single lug 5. This device ensures efficient and safe testing while obtaining accurate and sufficient test data. This test data allows for a comprehensive understanding of the strength evolution of various structural components, addressing structural design and strength assessment issues during model development.

[0047] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0048] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A multi-directional load loading test device for a curved grid wing, characterized in that: It includes a connecting rod mechanism, a single ear (5), and a bearing member; The connecting rod mechanism is arranged through both ends of the grid wing (6); The single ear (5) is arranged at one end of the grid wing (6), and one end of the single ear (5) is connected to one end of the connecting rod mechanism, and the other end of the single ear (5) is used to apply a load; The bearing member is arranged at the other end of the grid wing (6), and one end of the bearing member is connected to the other end of the connecting rod mechanism, and the other end of the bearing member is used to apply a load; The connecting rod mechanism is fitted with the grid wing (6), and the force applied to the single ear (5) and the bearing member is transmitted in different directions through the connecting rod mechanism; The connecting rod mechanism comprises a blocking block (1), a connecting plate (2), a connecting piece, and a pulling plate (4); The blocking blocks (1) are arranged through both ends of the grid wing (6); The two ends of the blocking block (1) are movably matched with the connecting plate (2) via connecting pieces; The connecting plate (2) and the pulling plate (4) are movably matched via a connecting piece; The single ear (5) is arranged at one end of the grid wing (6), and one end of the single ear (5) is connected to the pull plate (4); The bearing member is arranged at the other end of the grid wing (6), and one end of the bearing member is connected to the pull plate (4).

2. The multi-directional load loading test device for curved grid fins according to claim 1, characterized in that: One end of the block (1) is arranged in contact with the grid wing (6) and covers the grid of the grid wing (6) to achieve force transmission; the other end of the block (1) penetrates the grid of the grid wing (6).

3. The multi-directional load loading test device for a curved grid wing according to claim 1, characterized in that: The block (1) has first threaded holes at both ends, and the center lines of the first threaded holes at both ends are on the same axis, and the axis coincides with the center line of one end of the block (1) passing through the grid.

4. The multi-directional load loading test device for a curved grid wing according to claim 1, characterized in that: The blocking block (1), the connecting plate (2), and the pulling plate (4) are arranged in sequence from the inside to the outside on the outer side surfaces of both ends of the grid wing (6), and are movably connected via connecting pieces to achieve mutual rotation of the blocking block (1), the connecting plate (2), and the pulling plate (4).

5. The multi-directional load loading test device for a curved grid wing according to claim 4, characterized in that: The connecting plate (2) has first through holes at both ends and a second threaded hole in the middle. The connecting plate (2) and the blocking block (1) are movably connected via the connecting piece, so that the blocking block (1) and the connecting plate (2) can rotate relative to each other. The pull plate (4) has second through holes at both ends and a third threaded hole in the middle. The pull plate (4) is connected to the connecting plate (2) via the connecting piece, so that the connecting plate (2) and the pull plate (4) can rotate relative to each other.

6. The multi-directional load loading test device for a curved grid wing according to claim 4, characterized in that: One end of the single ear (5) is connected to the pull plate (4) through a third threaded hole on the pull plate (4) located on one side of the grid wing (6); one end of the bearing member is connected to the pull plate (4) through a third threaded hole on the other side of the grid wing (6).

7. The multi-directional load loading test device for a curved grid wing according to claim 5, characterized in that: The connecting rod mechanism is arranged in the four grids of the grid wing (6); the blocking blocks (1) are provided with four pieces, the connecting plates (2) are provided with four pieces, and the pulling plates (4) are provided with two pieces; the distance between the first through holes at both ends of the connecting plate (2) is equal to the distance between the centers of two adjacent grids; the distance between the second through holes at both ends of the pulling plate (4) is equal to the distance between the centers of two adjacent grids.

8. The multi-directional load loading test device for a curved grid wing according to claim 1, characterized in that: It also includes a steel wire rope (8); one end of the steel wire rope (8) is connected to the single ear (5), and the other end is connected to the bearing member.

9. The multi-directional load loading test device for a curved grid wing according to claim 1, characterized in that: The single ear (5) and the bearing member are on the same axis.

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