Vibration test device and method

Abstract

The invention provides a vibration test device and method, and the device employs a double-vibration-table control mode, employs two clamp assemblies to clamp a test piece, and employs a first positioning part and a second positioning part to fix the position of the test piece in the axial direction, achieves the application of vibration excitation in the vertical direction to the test piece with a taper contraction section, and improves the test precision. Vibration transmission is realized; meanwhile, aiming at the non-circular section, the large skin composite material surface and the copper strip, the problems of abrasion and indentation on the composite material surface in the test are avoided, so that the risk that the surface of a test piece is damaged is avoided, the composite material is effectively protected, the assessment of the vibration magnitude is ensured, and the sufficiency of the vibration test is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration testing under mechanical environment, and in particular to a vibration testing device and method. Background Art

[0002] Aerospace products are developing rapidly, with increasing size and mass, complex appearance and structure, and skin structure made of metal or composite materials. Vibration test is an important part of product mechanical environmental test, the most common and widely used, which can effectively test the adaptability and coordination of each subsystem of the product under vibration environment conditions, test product structure, equipment performance and process quality, and is an effective method in product design and evaluation.

[0003] Due to the limitations of the vibration test fixture structure and clamping method, for test pieces with complex structures, non-circular cross-sections, and large skin composite materials, and in order to ensure the effective function of the composite materials on the outer surface of the product, conventional test fixtures cannot be clamped, making it impossible to implement vibration test assessment on the product, affecting the product's structural design and installation reliability verification.

[0004] How to simulate the vibration environment of the product structure under real working conditions? According to the product appearance and structural characteristics, a reliable vibration test fixture can be designed. It is also necessary to consider that the composite material on the outer surface of the product is not squeezed and damaged by the fixture. The vertical dual vibration table excitation can be carried out. The dual-table square array control method is adopted. It is a key technology for conducting mechanical environmental tests on large composite complex structure products and has important significance for the assessment of product reliability. However, in the existing technology, due to the limitations of the vibration test fixture structure and clamping method, there are technical problems such as difficulty in applying loads to vibration tests of complex structures, non-circular cross-sections, and large skin composite products. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0006] According to one aspect of the present invention, a vibration test device is provided, which includes: a vibration table system, a test fixture system, a hanging system, a positioning assembly and a copper belt; the vibration table system includes two vibration tables for providing vibration excitation in the vertical direction; the test fixture system includes a first fixture assembly and a second fixture assembly, the first fixture assembly and the second fixture assembly are used to clamp the test piece, one end of the first fixture assembly and the second fixture assembly are respectively connected to the two vibration tables, and the other ends are respectively used to suspend the test piece through the hanging system; the positioning assembly includes a plurality of first positioning members and a plurality of second positioning members, the first positioning member passes through the first fixture assembly to be connected to the test piece, the second positioning member passes through the second fixture assembly to be connected to the test piece, and the first positioning member and the second positioning member are used to fix the axial position of the test piece; the copper belt is located between the first fixture assembly, the second fixture assembly and the test piece, and the copper belt is used to protect the test piece while ensuring the vibration level.

[0007] Furthermore, the first fixture assembly includes a first snap-ring type curved surface fixture, a second snap-ring type curved surface fixture and a first fixture base. The first snap-ring type curved surface fixture and the second snap-ring type curved surface fixture surround and fix the test piece from top to bottom. The first snap-ring type curved surface fixture is connected to the hanging system, and the second snap-ring type curved surface fixture is connected to a vibration table through the first fixture base.

[0008] Furthermore, the second fixture assembly includes a third clamp-ring type curved surface fixture, a fourth clamp-ring type curved surface fixture and a second fixture base. The third clamp-ring type curved surface fixture and the fourth clamp-ring type curved surface fixture surround and fix the test piece from top to bottom. The third clamp-ring type curved surface fixture is connected to the hanging system, and the fourth clamp-ring type curved surface fixture is connected to another vibration table through the second fixture base.

[0009] Furthermore, the first snap ring type arc surface clamp and the third snap ring type arc surface clamp have a plurality of positioning mounting seats (a), the first positioning member and the second positioning member are arranged in one-to-one correspondence with the positioning mounting seats (a), and the first positioning member and the second positioning member are respectively connected to the test piece through the positioning mounting seats (a).

[0010] Furthermore, the hanging system includes two hanging subsystems, and the hanging subsystem includes an elastic hanging member and a crane hook. The elastic hanging member is connected to the gantry through the crane hook, and the first clamp type arc surface clamp and the third clamp type arc surface clamp are respectively connected to the two elastic hanging members.

[0011] Furthermore, the vibration test device also includes two auxiliary hanging subsystems, which include connecting channel steel, crane hook and several straps. One end of the connecting channel steel is connected to the gantry through the crane hook, and the first positioning piece and the second positioning piece are respectively connected to the other end of the connecting channel steel through the straps.

[0012] Furthermore, the auxiliary hanging subsystem also includes a plurality of U-shaped hooks, one end of the connecting channel steel is connected to the crane hook through the U-shaped hook, and the other end is connected to a plurality of straps through the plurality of U-shaped hooks.

[0013] Furthermore, the vibration test device also includes two mechanical decoupling devices, which are arranged in a one-to-one correspondence with the two vibration tables. One end of any mechanical decoupling device is connected to the first fixture base or the second fixture base, and the other end is connected to the corresponding vibration table.

[0014] Furthermore, the vibration test device also includes two vibration sensors, a vibration controller and an industrial computer. The two vibration sensors are respectively fixed to the first clamp-type arc surface fixture and the third clamp-type arc surface fixture. The vibration controller is respectively electrically connected to the two vibration sensors, the two vibration tables and the industrial computer to provide vibration control for the test piece.

[0015] According to another aspect of the present invention, a vibration test method is provided, which uses the vibration test device as described above to perform a vibration test on a test piece.

[0016] By applying the technical solution of the present invention, a vibration test device and method are provided. The vibration test device adopts a dual vibration table control method, utilizes two clamp assemblies to clamp the test piece, and uses a first positioning member and a second positioning member to fix the axial position of the test piece, thereby realizing vertical vibration excitation on the test piece with a tapered contraction section, thereby realizing vibration transmission; at the same time, for non-circular cross-sections and large-skin composite material surfaces, the provision of copper strips avoids the problems of wear and indentation on the composite material surface during the test, thereby avoiding the risk of causing damage to the test piece surface, effectively protecting the composite material, ensuring the assessment of the vibration magnitude, and improving the adequacy of the vibration test. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The included drawings are used to provide a further understanding of the embodiments of the present invention, which constitute a part of the specification, are used to illustrate the embodiments of the present invention, and together with the text description, explain the principles of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It shows a schematic structural diagram of a vibration test device provided according to a specific embodiment of the present invention;

[0019] Figure 2 Shows Figure 1 A partial enlarged schematic diagram in the middle;

[0020] Figure 3A schematic structural diagram of a first clamp assembly provided according to a specific embodiment of the present invention is shown;

[0021] Figure 4 A schematic structural diagram of a first clamp base provided according to a specific embodiment of the present invention is shown;

[0022] Figure 5 A schematic structural diagram of a second clamp assembly provided according to a specific embodiment of the present invention is shown;

[0023] Figure 6 A schematic structural diagram of a second clamp base provided according to a specific embodiment of the present invention is shown;

[0024] Figure 7 A schematic structural diagram of a first positioning member / a second positioning member provided according to a specific embodiment of the present invention is shown;

[0025] Figure 8 A schematic structural diagram of a copper strip provided according to a specific embodiment of the present invention is shown.

[0026] The above drawings include the following reference numerals:

[0027] 1. Vibration table; 2. First clamp assembly; 21. First clamp with snap ring; 22. Second clamp with snap ring; 23. First clamp base; 3. Second clamp assembly; 31. Third clamp with snap ring; 32. Fourth clamp with snap ring; 33. Second clamp base; a. Positioning mount; 4. First positioning piece; 5. Second positioning piece; 6. Copper belt; 7. Elastic hanging piece; 8. Crane hook; 9. Connecting channel steel; 10. Wrapping belt; 11. U-shaped hook; 12. Mechanical decoupling device; 13. Vibration sensor; 14. Vibration controller; 15. Industrial computer; 100. Test piece; 200. Gantry. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments in 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.

[0029] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0030] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0031] like Figures 1 to 7 As shown, according to a specific embodiment of the present invention, a vibration test device is provided, which includes: a vibration table system, a test fixture system, a hanging system, a positioning component and a copper belt 6;

[0032] The vibration table system includes two vibration tables 1, which are used to provide vibration excitation in the vertical direction;

[0033] The test fixture system includes a first fixture assembly 2 and a second fixture assembly 3, the first fixture assembly 2 and the second fixture assembly 3 are used to clamp the test piece 100, one end of the first fixture assembly 2 and the second fixture assembly 3 are respectively connected to the two vibration tables 1, and the other ends are respectively used to suspend the test piece 100 through the hanging system;

[0034] The positioning assembly includes a plurality of first positioning members 4 and a plurality of second positioning members 5. The first positioning members 4 pass through the first fixture assembly 2 to connect with the test piece 100. The second positioning members 5 pass through the second fixture assembly 3 to connect with the test piece 100. The first positioning members 4 and the second positioning members 5 are used to fix the position of the test piece 100 in the axial direction.

[0035] The copper tape 6 is located between the first clamp assembly 2 and the second clamp assembly 3 and the test piece 100 , and the copper tape 6 is used to protect the test piece 100 while ensuring the vibration level.

[0036] By applying this configuration, a vibration test device is provided. The vibration test device adopts a dual vibration table control method, utilizes two fixture assemblies to clamp the test piece, and uses a first positioning member and a second positioning member to fix the axial position of the test piece, thereby realizing vertical vibration excitation on the test piece with a tapered contraction section, thereby realizing vibration transmission; at the same time, for non-circular cross-sections and large-skin composite material surfaces, the setting of the copper belt avoids the problems of wear and indentation on the composite material surface during the test, thereby avoiding the risk of damage to the test piece surface, effectively protecting the composite material, ensuring the assessment of the vibration magnitude, and improving the adequacy of the vibration test.

[0037] As a specific embodiment of the present invention, both the first positioning member 4 and the second positioning member 5 can be positioning screws or other connecting members. The selection of the positioning member is only an example, but not limited thereto.

[0038] As another specific embodiment of the present invention, the number of the first positioning member 4 and the second positioning member 5 can be adjusted according to actual conditions, for example, both of them are 2.

[0039] As another specific embodiment of the present invention, the copper strip 6 has excellent mechanical properties and wear resistance, high strength and corrosion resistance, and its thickness can be adjusted according to the size of the fixture and the test piece 100. For example, a copper strip 6 with a thickness of 0.2 mm can be laid.

[0040] Further, the first clamp assembly 2 can be configured to include a first snap-ring type curved surface clamp 21, a second snap-ring type curved surface clamp 22 and a first clamp base 23, the first snap-ring type curved surface clamp 21 and the second snap-ring type curved surface clamp 22 surround and fix the test piece 100 from top to bottom, the first snap-ring type curved surface clamp 21 is connected to the hanging system, and the second snap-ring type curved surface clamp 22 is connected to a vibration table 1 through the first clamp base 23; the second clamp assembly 3 includes a third snap-ring type curved surface clamp 31, a fourth snap-ring type curved surface clamp 32 and a second clamp base 33, the third snap-ring type curved surface clamp 31 and the fourth snap-ring type curved surface clamp 32 surround and fix the test piece 100 from top to bottom, the third snap-ring type curved surface clamp 31 is connected to the hanging system, and the fourth snap-ring type curved surface clamp 32 is connected to another vibration table 1 through the second clamp base 33.

[0041] The present invention adopts two sets of clamping ring type arc surface test fixtures to realize two-point excitation of the test piece, which is suitable for test pieces with complex structures and non-circular cross-sections. It avoids the problem of difficulty in applying vibration loads due to limitations on the test piece structure and clamping method during the test, and can effectively solve the technical problem of applying vibration to a tapered contraction section.

[0042] For the above-mentioned fixture assembly, the copper tape 6 can be configured to be disposed between the first and second cambered-ring fixtures 21 and 22 and the test piece 100 , and between the third and fourth cambered-ring fixtures 31 and 32 and the test piece 100 .

[0043] As a specific embodiment of the present invention, the first snap ring type curved surface clamp 21 and the second snap ring type curved surface clamp 22, and the third snap ring type curved surface clamp 31 and the fourth snap ring type curved surface clamp 32 can be connected by fasteners. In this embodiment, the fasteners can be any fastening parts such as bolts. The selection of the above fasteners is only an example, but is not limited thereto.

[0044] As another specific embodiment of the present invention, the first snap ring type arc surface clamp 21 and the third snap ring type arc surface clamp 31 can be configured to have a plurality of positioning mounting seats a, the first positioning member 4 and the second positioning member 5 are arranged one by one corresponding to the positioning mounting seats a, and the first positioning member 4 and the second positioning member 5 are respectively connected to the test piece 100 through the positioning mounting seats a.

[0045] The present invention installs the first positioning member 4 and the second positioning member 5 at the positions of the first fixture component 2 and the second fixture component 3, and paves a copper strip 6 of a certain thickness on the surface of the clamping position of the first fixture component 2 and the second fixture component 3, thereby realizing reliable clamping of the vibration test fixture, preventing the composite material on the outer surface of the product from being crushed and worn by the fixture, effectively protecting the composite material, and simulating the vibration environment that effectively applies excitation to the non-circular cross-section contraction section.

[0046] Furthermore, the configurable hanging system includes two hanging subsystems, which include an elastic hanging component 7 and a crane hook 8. The elastic hanging component 7 is connected to the gantry 200 through the crane hook 8, and the first clamp type arc surface clamp 21 and the third clamp type arc surface clamp 31 are respectively connected to the two elastic hanging components 7.

[0047] The present invention adopts an elastic hanger 7 to realize free suspension of the test piece 100 through two sets of snap ring type arc surface clamps of the first clamp assembly 2 and the second clamp assembly 3, so as to offset the dead weight of the test piece 100 and the test clamp, thereby ensuring that the test piece 100 is in a free-free boundary condition during the vibration test.

[0048] As a specific embodiment of the present invention, the elastic hanging member 7 can be a rubber rope, a spring or other elastic ropes. The above elastic hanging member selection is only an example, but not limited to this.

[0049] As another specific embodiment of the present invention, the first snap ring type curved surface clamp 21 and the elastic hanging member 7, and the third snap ring type curved surface clamp 31 and the elastic hanging member 7 can be connected by fasteners. In this embodiment, the fasteners can be any fastening parts such as bolts. The above fasteners are selected only as examples, but are not limited thereto.

[0050] Furthermore, the configurable vibration test device also includes two auxiliary hanging subsystems, which include a connecting channel steel 9, a crane hook 8 and a plurality of straps 10. One end of the connecting channel steel 9 is connected to the gantry 200 through the crane hook 8, and the first positioning member 4 and the second positioning member 5 are respectively connected to the other end of the connecting channel steel 9 through the straps 10.

[0051] In the present invention, on the one hand, the positioning piece avoids the axial movement of the clamp-ring type arc surface clamp during the vibration test, thereby realizing the reliable clamping and fixation of the vibration test fixture; on the other hand, the connecting channel steel plays a role in suspending and protecting the test piece by connecting with the crane hook, effectively solving the environmental simulation of vibration excitation applied to the non-circular cross-section contraction section, and improving the safety of the test.

[0052] As a specific embodiment of the present invention, the auxiliary hanging subsystem also includes a plurality of U-shaped hooks 11 , one end of the connecting channel steel 9 is connected to the crane hook 8 through the U-shaped hook 11 , and the other end is connected to a plurality of wrapping belts 10 through the plurality of U-shaped hooks 11 .

[0053] Furthermore, the vibration testing device also includes two mechanical decoupling devices 12, and the two mechanical decoupling devices 12 are arranged in a one-to-one correspondence with the two vibration tables 1. One end of any mechanical decoupling device 12 is connected to the first fixture base 23 or the second fixture base 33, and the other end is connected to the corresponding vibration table 1.

[0054] The present invention adopts a mechanical decoupling device 12 to eliminate the lateral displacement of the moving coil of the vibration table 1 caused by the asynchronous vibration of the two vibration tables 1, reduce the mechanical coupling between the two vibration tables 1, and protect the safety of the vibration table system and the test piece 100.

[0055] As a specific embodiment of the present invention, one end of the mechanical decoupling device 12 is connected to the first fixture base 23 or the second fixture base 33 through a fastener, and the other end is connected to the corresponding vibration table 1 through a fastener.

[0056] Furthermore, the vibration test device also includes two vibration sensors 13, a vibration controller 14 and an industrial computer 15. The two vibration sensors 13 are respectively fixed to the first clamping ring type arc surface clamp 21 and the third clamping ring type arc surface clamp 31. The vibration controller 14 is respectively electrically connected to the two vibration sensors 13, the two vibration tables 1 and the industrial computer 15 to provide vibration control for the test piece 100.

[0057] The vibration test device of the present invention is directly connected and fixed to the test piece through two snap ring type arc surface clamps, which makes full use of the structural characteristics of the test piece itself and improves the authenticity of the vibration test assessment; it can meet the test requirements of inconsistent vibration excitation conditions of the front and rear structures of the test piece, avoid the phenomenon of local under-testing or over-testing under single-unit excitation, and better simulate the real vibration environment of the load distribution of the test piece in flight, thereby improving the coverage of vibration environment simulation. The present invention can be widely used in vibration tests of complex structures, non-circular cross-sections, and large-skin composite materials in the fields of aerospace, unmanned aerial vehicles, weapons, etc.

[0058] In order to further understand the present invention, the following Figures 1 to 8 The vibration test device of the present invention will be described in detail.

[0059] like Figures 1 to 8 As shown, according to a specific embodiment of the present invention, a vibration test device is provided, which includes: two vibration tables 1, a first fixture assembly 2, a second fixture assembly 3, two first positioning members 4, two second positioning members 5, a copper belt 6, two hanging subsystems, two auxiliary hanging subsystems, two mechanical decoupling devices 12, two vibration sensors 13, a vibration controller 14 and an industrial computer 15.

[0060] The vibration table system is the main component of the entire vibration test device, including the vertical vibration table 1, the vibration table support, and the supporting power amplifier and cooling system. The vibration table 1 body is installed on the vibration table 1 support. The vibration table 1 provides vertical vibration excitation. The vibration table 1 can use an ordinary commercial electromagnetic vibration table 1. The vibration table support is used to support the vertical vibration table.

[0061] The function of the test fixture is to constrain and fix the test product, load it in the vertical direction, and transmit the excitation of the vibration table 1 to the test piece 100. The first fixture assembly 2 includes a first snap ring type curved surface fixture 21, a second snap ring type curved surface fixture 22 and a first fixture base 23. The first snap ring type curved surface fixture 21 and the second snap ring type curved surface fixture 22 surround and fix the test piece 100 from top to bottom. The first snap ring type curved surface fixture 21 is connected to the hanging system, and the second snap ring type curved surface fixture 22 is connected to one vibration table 1 through the first fixture base 23; the second fixture assembly 3 includes a third snap ring type curved surface fixture 31, a fourth snap ring type curved surface fixture 32 and a second fixture base 33. The third snap ring type curved surface fixture 31 and the fourth snap ring type curved surface fixture 32 surround and fix the test piece 100 from top to bottom. The third snap ring type curved surface fixture 31 is connected to the hanging system, and the fourth snap ring type curved surface fixture 32 is connected to another vibration table 1 through the second fixture base 33.

[0062] On the one hand, it can be connected to the test piece 100 through the ring support to realize the operability of restraining, fixing and installing the test piece 100; on the other hand, it can be closely connected with two vibration tables 1 in the vertical direction, thereby realizing the transmission of vibration excitation.

[0063] The hanging subsystem includes an elastic hanging member 7 and a crane hook 8. The elastic hanging member 7 is connected to the gantry 200 via the crane hook 8. The first snap ring type curved surface clamp 21 and the third snap ring type curved surface clamp 31 are respectively connected to the two elastic hanging members 7 via fasteners.

[0064] The auxiliary hanging subsystem includes a connecting channel steel 9 , a crane hook 8 and a plurality of straps 10 . One end of the connecting channel steel 9 is connected to the gantry 200 through the crane hook 8 , and the other end is connected to the strap 10 .

[0065] There are four positioning screws, two of which are threadedly connected to the test piece 100 through the positioning mounting seat a on the top of the first snap-ring type arc surface clamp 21; the other two are threadedly connected to the test piece 100 through the positioning mounting seat a on the side of the third snap-ring type arc surface clamp 31; the positioning screws are connected to the connecting channel steel 9 through the wrapping tape 10 respectively.

[0066] The present invention connects two vibration tables 1 and a test piece 100 through a first fixture assembly 2 and a second fixture assembly 3 to realize a double-table excitation mode, uses a rubber rope group as an elastic hanging member 7 to realize a two-point suspension of the test piece 100, adopts a uniaxial double-table vibration mode, excites the test piece 100 in a vertical direction, and the control point is selected on the first fixture assembly 2 and the second fixture assembly 3 of the test piece 100. The clamp-ring type arc surface vibration test device is suitable for aerospace products with complex test piece appearance and structure, non-circular cross-section, and large skin composite materials.

[0067] The mechanical decoupling device 12 is used to eliminate or reduce the adverse effects of the coupled motion of the dual-stage vibration on the test piece 100 and the vibration table 1. One end of the mechanical decoupling device 12 is connected to the corresponding fixture base through a fastener, and the other end is connected to the corresponding vibration table 1 through a fastener.

[0068] The vibration controller 14 is a device for controlling the vibration test to realize the control function of each control point. The vibration controller can generate a vibration signal and control the vibration level according to the specified test conditions so that the test piece can achieve the expected vibration response. The vibration control of the present invention adopts the vibration controller of SD Company, which has a multi-input and multi-output vibration control function.

[0069] The working principle of the present invention is: a vibration controller 14 is used to send an excitation signal to two vibration tables 1 in the vertical direction, and the two vibration tables 1 generate corresponding vertical vibrations, and the vibrations are transmitted to the test piece 100 through the test fixture.

[0070] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0071] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A vibration test device, It is characterized in that The vibration test device comprises: a vibration table system, a test fixture system, a hanging system, a positioning component and a copper belt (6); The vibration table system comprises two vibration tables (1) for providing vibration excitation in a vertical direction; The test fixture system comprises a first fixture assembly (2) and a second fixture assembly (3), wherein the first fixture assembly (2) and the second fixture assembly (3) are used to clamp a test piece (100), one end of the first fixture assembly (2) and the second fixture assembly (3) are respectively connected to two vibration tables (1), and the other ends thereof are respectively used to suspend the test piece (100) through a suspension system; The positioning assembly comprises a plurality of first positioning members (4) and a plurality of second positioning members (5), wherein the first positioning members (4) pass through the first clamp assembly (2) to be connected to the test piece (100), and the second positioning members (5) pass through the second clamp assembly (3) to be connected to the test piece (100), and the first positioning members (4) and the second positioning members (5) are used to fix the axial position of the test piece (100); The copper tape (6) is located between the first clamp assembly (2), the second clamp assembly (3) and the test piece (100), and the copper tape (6) is used to protect the test piece (100) while ensuring the vibration level.

2. The vibration test device according to claim 1, It is characterized in that The first clamp assembly (2) comprises a first clamp-ring type curved surface clamp (21), a second clamp-ring type curved surface clamp (22) and a first clamp base (23); the first clamp-ring type curved surface clamp (21) and the second clamp-ring type curved surface clamp (22) surround and fix the test piece (100) from top to bottom; the first clamp-ring type curved surface clamp (21) is connected to a hanging system; and the second clamp-ring type curved surface clamp (22) is connected to a vibration table (1) via the first clamp base (23).

3. The vibration test device according to claim 2, It is characterized in that The second fixture assembly (3) comprises a third snap ring type curved surface fixture (31), a fourth snap ring type curved surface fixture (32) and a second fixture base (33); the third snap ring type curved surface fixture (31) and the fourth snap ring type curved surface fixture (32) surround and fix the test piece (100) from top to bottom; the third snap ring type curved surface fixture (31) is connected to the hanging system; and the fourth snap ring type curved surface fixture (32) is connected to another vibration table (1) via the second fixture base (33).

4. The vibration test device according to claim 3, It is characterized in that The first snap ring type curved surface fixture (21) and the third snap ring type curved surface fixture (31) have a plurality of positioning mounting seats (a), the first positioning member (4) and the second positioning member (5) are arranged in one-to-one correspondence with the positioning mounting seats (a), and the first positioning member (4) and the second positioning member (5) are respectively connected to the test piece (100) through the positioning mounting seats (a).

5. The vibration test device according to claim 4, It is characterized in that The hanging system comprises two hanging subsystems, wherein the hanging subsystems comprise an elastic hanging member (7) and a crane hook (8), wherein the elastic hanging member (7) is connected to the gantry (200) via the crane hook (8), and the first snap ring type cambered surface clamp (21) and the third snap ring type cambered surface clamp (31) are respectively connected to the two elastic hanging members (7).

6. The vibration test device according to any one of claims 1 to 5, It is characterized in that The vibration test device also includes two auxiliary hanging subsystems, the auxiliary hanging subsystems including a connecting channel steel (9), a crane hook (8) and a plurality of straps (10), one end of the connecting channel steel (9) is connected to the gantry (200) via the crane hook (8), and the first positioning member (4) and the second positioning member (5) are respectively connected to the other end of the connecting channel steel (9) via the straps (10).

7. The vibration test device according to claim 6, It is characterized in that The auxiliary hanging subsystem also includes a plurality of U-shaped hooks (11), one end of the connecting channel steel (9) is connected to the crane hook (8) through the U-shaped hook (11), and the other end is connected to the plurality of wrapping belts (10) through the plurality of U-shaped hooks (11).

8. The vibration test device according to claim 3, It is characterized in that The vibration test device also includes two mechanical decoupling devices (12), which are arranged in a one-to-one correspondence with the two vibration tables (1), and one end of any mechanical decoupling device (12) is connected to the first fixture base (23) or the second fixture base (33), and the other end is connected to the corresponding vibration table (1).

9. The vibration test device according to claim 3, It is characterized in that The vibration test device also includes two vibration sensors (13), a vibration controller (14) and an industrial computer (15). The two vibration sensors (13) are respectively fixed to a first clamping ring type curved surface fixture (21) and a third clamping ring type curved surface fixture (31). The vibration controller (14) is respectively electrically connected to the two vibration sensors (13), two vibration tables (1) and the industrial computer (15) to provide vibration control for the test piece (100).

10. A vibration test method, It is characterized in that A vibration test of a test piece is performed using the vibration test device according to any one of claims 1 to 9.

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