Simulated impact test bench and impact test method

Abstract

The invention discloses a simulation impact test bench and an impact test method, and belongs to the field of impact tests. The simulation impact test bench comprises a base, a horizontal vibration isolation assembly, a vertical vibration isolation assembly and a limiting assembly. Wherein a fixing plate is arranged on the base, and the horizontal vibration isolators are arranged on the fixing plate in pairs; the horizontal vibration isolator comprises a supporting rod, a supporting plate and a detachable elastic buffering piece. When the tested equipment is installed, the supporting rod enables the elastic buffering piece on the supporting plate to abut against the surface of the tested equipment. The limiting assembly can adjust the elastic deformation amount of the fixing plate, and therefore the compression amount of the elastic buffering piece is adjusted. The vertical vibration isolation assembly is arranged between the base of the base and the impact table top. The simulation impact test bench has good reliability in a high-load impact test, the vibration isolators are not prone to instability damage, the test efficiency can be improved, and the test cost can be optimized.

Description

Technical Field

[0001] The invention belongs to the field of impact testing, and in particular relates to a simulated impact test bench and an impact testing method. Background Art

[0002] For large-scale simulator test equipment, it is necessary to accurately simulate the impact load and impact frequency in the real environment in order to obtain qualified impact test data that is dynamically equivalent. In order to protect the test equipment and adjust the actual load borne by the test equipment, vibration isolators need to be installed to buffer the load and adjust the frequency. However, the standard large-scale vibration isolators that can currently be frequency-adjusted, such as rubber vibration isolators, spring vibration isolators, etc., are large in size and weight. When installed laterally, they are prone to drooping due to gravity, resulting in instability and damage during high-load heavy-entry tests, and even damage to the test equipment. Therefore, providing a simulation impact test bench with better vibration isolation performance is of positive significance for improving the reliability and economy of impact tests. Summary of the Invention

[0003] The present invention aims to provide a simulated impact test bench to improve vibration isolation performance. The present invention also provides an impact test method.

[0004] According to an embodiment of one aspect of the present invention, a simulation impact test bench is provided, comprising a base, a horizontal vibration isolation assembly, a vertical vibration isolation assembly and a limit assembly; wherein,

[0005] The base includes a base and an impact table, the impact table is arranged on the base, the impact table provides an installation position for the test device, and the base is provided with a fixing plate extending in a vertical direction, and the fixing plates are arranged on both sides of the impact table;

[0006] The horizontal vibration isolation assembly includes a plurality of horizontal vibration isolators arranged in pairs, each of the horizontal vibration isolators including a support rod, a support plate, and an elastic buffer. One end of the support rod is fixedly connected to the fixed plate, and the other end is fixedly connected to the support plate. Each support plate is connected to a plurality of the support rods. The elastic buffer is detachably arranged on the surface of the support plate. The elastic buffers of each pair of horizontal vibration isolators are arranged relative to each other to allow the elastic buffers to abut against the surface of the test device when the test device is installed in the installation position.

[0007] The limit assembly includes a first assembly, a second assembly, and a limit adjustment member, wherein the first assembly and the second assembly are respectively fixedly connected to the fixed plate, and the first assembly and the second assembly are connected via the limit adjustment member, and the limit adjustment member adjusts the connection gap between the first assembly and the second assembly to adjust the elastic deformation of the fixed plate and adjusts the compression of the elastic buffer member when the elastic buffer member abuts against the test device;

[0008] The vertical vibration isolation assembly includes a buffer pad disposed between the base and the impact table.

[0009] The test bench provides dispersed horizontal buffer support for the test equipment through multiple sets of horizontal vibration isolators, thereby effectively reducing the weight of a single limit device and preventing it from deforming due to its own weight; at the same time, each support plate is fixed with multiple support rods, which can effectively disperse the impact load and reduce the risk of instability and damage; the detachable elastic buffer can be replaced according to the test frequency, and the limit assembly can keep the elastic buffer in a compressed state to prevent secondary collisions.

[0010] Furthermore, in some embodiments, the simulated impact test bench further includes an impact table buffer assembly, wherein the impact table buffer assembly includes a plurality of limiters, and the limiters are fixedly connected to the base and provide horizontal limitation for the impact table.

[0011] Furthermore, in some embodiments, a compressed elastic block is provided between the stopper and the impact table, and the degree of compression of the elastic block is adjustable.

[0012] Furthermore, in some embodiments, the elastic buffer member and the buffer pad are made of rubber or polyurethane.

[0013] Furthermore, in some embodiments, at least two pairs of horizontal vibration isolators are provided.

[0014] Furthermore, in some embodiments, the limit adjustment member is configured as an adjustment bolt.

[0015] Furthermore, in some embodiments, the first component and the second component are respectively configured as U-shaped frames, the bottom of the U-shaped frame is fixedly connected to the fixing plate, and the adjusting bolts are connected to both ends of the U-shaped frame.

[0016] Furthermore, in some embodiments, the impact table is configured as a rectangular table, and the buffer pads are disposed at the four corners of the rectangular table.

[0017] Furthermore, in some embodiments, the length of the support rod is adjustable.

[0018] According to another embodiment of the present invention, there is provided an impact test method, which uses the simulated impact test bench provided in any of the above embodiments and includes the following steps:

[0019] The device under test is mounted on the impact table, and the elastic buffer having the corresponding frequency is provided according to the test conditions, so that the elastic buffer abuts against the surface of the device under test;

[0020] Adjusting the limit adjustment member to change the compression amount of the elastic buffer member;

[0021] A vertical impact load and / or a horizontal impact load along the axial direction of the support rod is provided to the test equipment.

[0022] This method can effectively test equipment with different masses and vibration characteristics, reduce the risk of damage to the equipment, improve test efficiency, and optimize test costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of a simulated impact test bench in one embodiment;

[0024] Figure 2 This is a schematic diagram of the installation structure of the test equipment in one embodiment;

[0025] Figure 3 for Figure 2 A partial enlarged view of area A in the middle.

[0026] The meaning of the accompanying figures: 1-base; 11-base; 12-cushion; 13-limiter; 14-elastic block; 15-fixed angle code; 16-fixed plate; 17-impact table; 2-horizontal vibration isolation assembly; 21-support rod; 22-support plate; 23-elastic buffer; 3-limiting assembly; 31-first assembly; 32-second assembly; 33-limiting adjustment member; 4-test equipment.

[0027] The purpose of the above drawings is to explain the present invention in detail in conjunction with the drawings so that those skilled in the art can understand the technical concept of the present invention, and is not intended to limit the present invention. For the sake of simplicity, the above drawings only schematically depict the structures related to the technical features of the present invention, and do not strictly depict the complete structure and all details in accordance with the actual scale. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below through specific embodiments with reference to the accompanying drawings.

[0029] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment herein. The appearance of such phrases in various places in the specification does not necessarily refer to the same embodiment, nor does it limit mutually exclusive independent or alternative embodiments. Those skilled in the art will appreciate that an embodiment herein may be combined with other embodiments as long as no structural conflicts arise.

[0030] In the description herein, unless otherwise specified or limited, the technical terms "installed," "connected," and "connected" should be understood broadly, and may refer to, for example, a movable connection, a fixed connection, or an integral connection. Those skilled in the art will understand the specific meanings of these terms in the embodiments of this application based on the specific circumstances.

[0031] In the description of this document, terms indicating orientation or positional relationships, such as "up", "down", "left", "right", "horizontal", "vertical", "height", "length", and "width", are intended to accurately describe the embodiments and simplify the description, but are not intended to limit the parts or structures involved to having a specific orientation, being installed or operated in a specific orientation, and should not be understood as limiting the embodiments in this document.

[0032] In the description herein, terms such as "first" and "second" are used only to distinguish different objects and should not be understood to indicate relative importance or to limit the quantity, specific order, or primary and secondary relationship of the described technical features. In the description herein, "plurality" means at least two.

[0033] Impact test benches require vibration isolators to modulate the impact load frequency, thereby simulating a real-world impact environment and ensuring the dynamic equivalence of the test. Currently, conventional vibration isolators, such as coil spring isolators, rubber isolators, and wire rope isolators, generally have several drawbacks and deficiencies. These include: limited impact loads and a tendency to fail under high-intensity tests; limited load-bearing capacity, resulting in complex isolator structures and large footprints when subjected to high impact loads; difficulty in stepless adjustment; and the tendency to tilt when arranged horizontally, leading to overall instability and damage during testing. Furthermore, these devices are prone to mutual interference under complex, multi-directional vibration loading.

[0034] In order to overcome the above-mentioned shortcomings, an embodiment of one aspect of the present invention provides a simulated impact test bench, which is easy to adjust the frequency, simple and reliable, has better vibration isolation performance in the impact load test, is suitable for impact load testing of equipment of different masses and sizes, and can effectively protect the tested equipment from damage during the test.

[0035] In a preferred embodiment, the structure of the simulated impact test bench is as follows: Figure 1 As shown, when the device under test 4 is Figure 2When the method shown is installed on a simulated impact test bench, simulated impact tests can be carried out under various frequencies and different forms of loads to simulate the actual impact load under real working conditions.

[0036] The simulated impact test bench comprises a base 1, a horizontal vibration isolation assembly 2, a vertical vibration isolation assembly, and a limit assembly 3. The base 1 comprises a pedestal 11 and an impact table 17, which provides a mounting location for the device under test 4. A pair of vertically extending fixing plates 16 are disposed on either side of the impact table 17.

[0037] The horizontal vibration isolation assembly 2 is fixedly mounted on the fixed plate. Specifically, the horizontal vibration isolation assembly 2 includes two pairs of horizontally opposed horizontal vibration isolators, which are arranged in the vertical direction. Each horizontal vibration isolator includes a support rod 21, a support plate 22 and an elastic buffer 23. One end of the support rod 21 is fixedly connected to the fixed plate 16, and the other end is connected to the support plate 22. Each support plate 22 is fixedly connected to two support rods 21; the elastic buffer 23 is arranged on the surface of the support plate 22, and the elastic buffer 23 is detachable and can be replaced according to the test requirements. In the installed state, the elastic buffers 23 on a pair of opposed horizontal vibration isolators are arranged relative to each other. When the test device 4 is installed on the impact table 17, the elastic buffer 23 abuts against the surface of the test device 4.

[0038] It is easy to understand that in other embodiments, the horizontal vibration isolation assembly 2 may include three or more pairs of horizontal vibration isolators to meet higher impact load test requirements. Since the horizontal vibration isolators can be dispersed, the volume and weight of a single vibration isolator can be controlled under high load test conditions to avoid sagging deformation caused by its own weight, which may induce instability and damage during the test. Three or more support rods 21 can also be connected to each support plate 22 to improve the horizontal vibration isolator's ability to withstand high impact loads. It should be noted that in order to improve stability, the distance from the geometric center of the support plate 22 to each support rod 21 should be as equal as possible to further reduce the risk of instability during the test. In a preferred embodiment, the length of the support rod 21 is set to be adjustable to accommodate test equipment 4 of different sizes. In a preferred embodiment, the elastic buffer 23 is made of rubber or polyurethane.

[0039] The limiting component 3 includes a first component 31, a second component 32 and a limiting adjustment member 33. The first component 31 and the second component 32 are respectively fixedly connected to the two fixed plates 16, and are connected to each other through the limiting adjustment member 33. The first component 31 and the second component 32 respectively adopt a U-shaped frame structure, the bottom of the U-shaped frame is fixedly connected to the outside of the fixed plate 16 (that is, the side of the two fixed plates 16 facing away from each other), and the two ends of the U-shaped frame are respectively terminated by the limiting adjustment member 33. In a preferred embodiment, the limiting adjustment member 33 can be set as an adjustment bolt connected to the end of the first component 31 and the second component 32. It is easy to understand that within a certain load, the geometric shape of the first component 31 and the second component 32 does not affect their function. For example, the frame structure surrounded by the first component 31 and the second component 32 can be rectangular, circular or other shapes.

[0040] The limit adjustment member 33 can adjust the connection gap between the first component 31 and the second component 32 to adjust the elastic deformation of the fixed plate 16. When the connection gap between the first component 31 and the second component 32 is reduced, the two fixed plates 16 are elastically deformed by the tension of the first component 31 and the second component 32, respectively, so that the pairs of horizontal isolators installed on the fixed plates 16 are closer to each other; when the test device 4 is installed, the degree to which the elastic buffer 23 is compressed on the surface of the test device 4 can be adjusted by adjusting the connection gap between the first component 31 and the second component 32, thereby providing different restraining forces for the test device 4. During the impact load test, the elastic buffer 23 is always in a compressed state, which can prevent the support plate 22 from detaching from the surface of the test device 4 during the test, causing secondary impact and damage.

[0041] In a preferred embodiment, the impact table 17 is configured as a rectangular table, with a vertical vibration isolation assembly disposed between the impact table 17 and the base 11. This vertical vibration isolation assembly comprises a plurality of cushions 12. In a preferred embodiment, four cushions 12 are disposed on the surface of the base 11 at the four corners of the rectangular table to provide vertical cushioning for the impact table 17. The cushions 12 can also be made of rubber or polyurethane.

[0042] In a further preferred embodiment, Figure 3 As shown, the base 11 is also provided with two pairs of limiters 13, one located on either side of the fixed plate 16 and arranged in an opposing manner. The limiters 13 are used to provide horizontal positioning for the impact table 17. The upper surface of the impact table 17 is provided with fixed angle brackets 15, which are arranged one-to-one with the limiters 13. An elastic block 14 is provided between the limiter 13 and the fixed angle bracket 15 of the impact table 17. The elastic block 14 is in a compressed state, and its compression degree can be adjusted. The elastic block 14 can also be made of rubber or polyurethane.

[0043] Use Figures 1 to 3 The simulated impact test bench shown can effectively carry out impact load tests on test equipment 4 of different masses and sizes, and effectively prevent the vibration isolator from becoming unstable and being damaged or causing damage to the test equipment 4 during the test.

[0044] Another embodiment of the present invention provides a method for conducting an impact test using the above-mentioned simulated impact test bench:

[0045] First, the impact table 17 is assembled on the base 11, and the compression degree of the elastic block 14 is adjusted according to the test load.

[0046] Next, the test device is installed on the impact table 17. According to the impact test load and frequency, select an elastic buffer 23 that matches the frequency and install it on the support plate of the horizontal vibration isolator. The installation method can be adhesive bonding. By designing the mass, size and geometric structure of the elastic buffer 23, the frequency of the elastic buffer 23 can be effectively adjusted. Install the horizontal vibration isolator on the fixed plate 16, adjust the length of the support rod 21 protruding from the fixed plate 16, so that the elastic buffer 23 is pressed against the surface of the test device 4; adjust the adjusting bolt as the limit adjustment member 33, change the force and deformation of the fixed plate 16 to adjust the compression degree of the elastic buffer 23, and the applied pressure should be adapted to the impact load to prevent secondary impact.

[0047] Finally, an impact load is applied to the test device 4 to conduct the test. Specifically, in different embodiments, the impact load can be unidirectional, such as a vertical impact load or a horizontal impact load along the axis of the support rod 21; it can also be a multi-directional or composite load, such as a composite load in the vertical and horizontal directions, or a rotational impact load.

[0048] The purpose of the above embodiments is to provide a further detailed description of the present invention in conjunction with the accompanying drawings so that those skilled in the art can understand the technical concept of the present invention. Within the scope of the present invention, optimization or equivalent replacement of the technical features involved, as well as combination of implementation methods in different embodiments without causing structural or principle conflicts, all fall within the scope of protection of the present invention.

Claims

1. A simulated impact test bench, characterized in that: include: Base, horizontal vibration isolation assembly, vertical vibration isolation assembly and limit assembly; wherein, The base includes a base and an impact table, the impact table is arranged on the base, the impact table provides an installation position for the test device, and the base is provided with a fixing plate extending in a vertical direction, and the fixing plates are arranged on both sides of the impact table; The horizontal vibration isolation assembly includes a plurality of horizontal vibration isolators arranged in pairs, each of the horizontal vibration isolators including a support rod, a support plate, and an elastic buffer. One end of the support rod is fixedly connected to the fixed plate, and the other end is fixedly connected to the support plate. Each support plate is connected to a plurality of the support rods. The elastic buffer is detachably arranged on the surface of the support plate. The elastic buffers of each pair of horizontal vibration isolators are arranged relative to each other to allow the elastic buffers to abut against the surface of the test device when the test device is installed in the installation position. The limit assembly includes a first assembly, a second assembly, and a limit adjustment member, wherein the first assembly and the second assembly are respectively fixedly connected to the fixed plate, and the first assembly and the second assembly are connected via the limit adjustment member, and the limit adjustment member adjusts the connection gap between the first assembly and the second assembly to adjust the elastic deformation of the fixed plate and adjusts the compression of the elastic buffer member when the elastic buffer member abuts against the test device; The vertical vibration isolation assembly includes a buffer pad disposed between the base and the impact table.

2. The simulated impact test bench according to claim 1, characterized in that: It also includes an impact table buffer assembly, which includes a plurality of limiters. The limiters are fixedly connected to the base and provide horizontal limitation for the impact table.

3. The simulated impact test bench according to claim 2, characterized in that: A compressed elastic block is provided between the stopper and the impact table, and the compression degree of the elastic block is adjustable.

4. The simulated impact test bench according to claim 1, 2 or 3, characterized in that: The elastic buffer component and the buffer pad are made of rubber or polyurethane.

5. The simulated impact test bench according to claim 1, 2 or 3, characterized in that: At least two pairs of horizontal vibration isolators are provided.

6. The simulated impact test bench according to claim 1, 2 or 3, characterized in that: The limit adjustment member is configured as an adjustment bolt.

7. The simulated impact test bench according to claim 6, characterized in that: The first component and the second component are respectively configured as U-shaped frames, the bottom of the U-shaped frame is fixedly connected to the fixing plate, and the adjusting bolts are connected to both ends of the U-shaped frame.

8. The simulated impact test bench according to claim 1, 2 or 3, characterized in that: The impact table is configured as a rectangular table, and the buffer pads are disposed at the four corners of the rectangular table.

9. The simulated impact test bench according to claim 1, 2 or 3, characterized in that: The length of the support rod is adjustable.

10. An impact test method, characterized in that: The simulation impact test bench according to any one of claims 1 to 9 is used, and includes the following steps: The device under test is mounted on the impact table, and the elastic buffer having the corresponding frequency is provided according to the test conditions, so that the elastic buffer abuts against the surface of the device under test; Adjusting the limit adjustment member to change the compression amount of the elastic buffer member; An impact load is provided to the device under test.

11. The impact test method according to claim 10, characterized in that: The impact load includes a vertical impact load and / or a horizontal impact load along the axial direction of the support rod.

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