Modal vibration exciter testing device

Abstract

The utility model discloses a modal vibration exciter testing device which comprises a supporting assembly, the supporting assembly comprises a base plate, a movable supporting guide rail plate is fixedly installed at the upper end of the base plate, a sliding groove is formed in the movable supporting guide rail plate, the interior of the sliding groove is connected with a movable block in a sliding mode, and the movable block is connected with the base plate in a sliding mode. One end of the movable block is fixedly provided with a fixed guide column, one end of the fixed guide column is installed at one end of the fixed plate, the guide column, the movable block and the guide rail plate are driven by the lifting hydraulic cylinder to move up and down, accurate position adjustment of the vibration exciter assembly can be achieved, and the vibration exciter is accurately in height butt joint with a to-be-tested structure during installation. It is ensured that the relative position between the vibration exciter and the to-be-tested structure meets the test requirement, the height adjustment of the vibration exciter can be completed in a short time, the overall test efficiency is improved, it is avoided that the vibration exciter and the test structure are installed and connected through an ejector rod due to the fact that the height distance is long, and the ejector rod is not used as a connecting medium; introduction of additional rigidity or damping effect is prevented, characteristics of exciting force are changed, and vibration transmission efficiency is reduced.

Description

Technical Field

[0001] This utility model relates to the field of modal exciter technology, specifically to a modal exciter testing device. Background Art

[0002] Modal exciter testing devices are widely used in structural vibration analysis and modal testing. They are mainly used to study the vibration characteristics of structures or components and help evaluate their response under dynamic loads. Their core function is to excite the vibration of the structure through an excitation device, so that the dynamic response of the structure at different frequencies can be accurately captured to analyze its modal parameters (such as natural frequency, mode shape, damping ratio, etc.). Modal analysis is widely used in aerospace, automotive engineering, civil engineering, machinery manufacturing, construction, bridge monitoring and other fields to evaluate design quality, structural health monitoring and fault diagnosis.

[0003] However, in practice, by installing the exciter onto the structure under test, and depending on the characteristics of the structure, installing sensors (such as accelerometers, displacement sensors, etc.) on the surface or key parts of the structure to ensure the capture of comprehensive dynamic response data, the sensors are connected to the data acquisition system. Utilizing electromagnetic principles, the exciter is typically composed of electromagnets, coils, magnets, etc., generating a magnetic field through current to drive vibration. Since the modal exciter is fixedly installed on a support frame or platform, when testing other structures, the exciter transmission structure needs to be connected to the structure under test. If the height distance between the exciter and the test structure is relatively large, a top rod is required for installation. The top rod, as a connecting medium, may introduce additional rigidity or damping effects, changing the characteristics of the excitation force and reducing the vibration transmission efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a modal exciter testing device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a modal exciter testing device, comprising a support assembly, the support assembly comprising: a base plate, a movable support guide plate fixedly mounted on the upper end of the base plate, a sliding groove provided inside the movable support guide plate, a movable block slidably connected inside the sliding groove, a fixed guide post fixedly mounted on one end of the movable block, one end of the fixed guide post mounted on one end of a fixed plate, one end of the fixed plate being connected to the outside of the exciter assembly by screws, and a guide support rod moving through the movable block, the guide support rod being fixedly mounted inside the movable support guide plate.

[0006] As a further preferred embodiment of this technical solution, a limit block is provided at the upper end of the movable support guide plate, and the limit block is fixed by screws.

[0007] As a further preferred embodiment of this technical solution, a lifting adjustment assembly is installed at one end of the movable support guide plate. The lifting adjustment assembly includes a movable bolt, one end of which is rotatably connected to one end of the movable block.

[0008] As a further preferred embodiment of this technical solution, the movable bolt is equipped with a lifting guide column, the lower end of the lifting guide column is equipped with a lifting hydraulic cylinder, the lower end of the lifting hydraulic cylinder is connected to the upper end of the connecting block by screws, and a rotating bolt is installed inside the connecting block, the rotating bolt being rotatably connected to one end of the movable support guide plate.

[0009] As a further preferred embodiment of this technical solution, one end of the movable support guide plate is provided with a clamping groove, and a lead screw slides through the clamping groove.

[0010] As a further preferred embodiment of this technical solution, one end of the lead screw is welded to one end of the moving block, a clamping plate extends through the outer side of the lead screw, and a nut handle is provided on one side of the clamping plate. The nut handle is rotatably connected to the outer side of the lead screw.

[0011] This utility model provides a modal exciter testing device, which has the following beneficial effects:

[0012] (1) This utility model uses a lifting hydraulic cylinder to drive the guide column, moving block and guide rail plate to move up and down, which can realize the precise position adjustment of the exciter assembly. When the exciter is installed, it is precisely aligned with the height of the structure under test, ensuring that the relative position between the exciter and the structure under test meets the test requirements. The height adjustment of the exciter can be completed in a short time, which improves the overall test efficiency. It avoids the use of a top rod for installation connection when the height distance between the exciter and the test structure is relatively far, avoids the use of a top rod as a connection medium, and prevents the introduction of additional rigidity or damping effects, changes the characteristics of the excitation force, and reduces the vibration transmission efficiency.

[0013] (2) When the moving block and the vibrator assembly move up and down, the operator rotates the nut handle and tightens it on the outside of the screw, further squeezing and clamping the clamping plate on one side of the moving support guide plate, thus further ensuring the stability of the moving block and the vibrator assembly. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 This is a schematic diagram of the base plate and movable support guide plate of this utility model;

[0016] Figure 3This is a schematic diagram of the structure of the vibrator assembly and the lifting adjustment assembly of this utility model;

[0017] Figure 4 This is a schematic diagram of the guide support rod and the moving block structure of this utility model.

[0018] In the diagram: 100, Support assembly; 101, Base plate; 102, Moving support guide plate; 103, Clamping groove; 104, Sliding groove; 105, Limiting block; 106, Guide support rod; 107, Moving block; 108, Fixing plate; 109, Fixing guide column; 200, Vibrator assembly; 300, Clamping and fixing assembly; 301, Lead screw; 302, Nut handle; 303, Clamping plate; 400, Lifting and adjusting assembly; 401, Movable bolt; 402, Lifting guide column; 403, Lifting hydraulic cylinder; 404, Connecting block; 405, Rotating bolt. DETAILED DESCRIPTION

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0020] This utility model provides a technical solution: such as Figure 1-4As shown, in this embodiment, a modal exciter testing device includes a support assembly 100. The support assembly 100 includes: a base plate 101, a movable support guide plate 102 fixedly mounted on the upper end of the base plate 101, a sliding groove 104 formed inside the movable support guide plate 102, a movable block 107 slidably connected inside the sliding groove 104, a fixed guide post 109 fixedly mounted on one end of the movable block 107, one end of the fixed guide post 109 mounted on one end of a fixed plate 108, one end of the fixed plate 108 connected to the outside of the exciter assembly 200 by screws, and a guide support rod 106 moving through the movable block 107. The guide support rod 106 is fixedly mounted on the movable block 107. Inside the movable support guide plate 102, a limit block 105 is provided at the upper end of the movable support guide plate 102, and the limit block 105 is fixed by screws. A lifting adjustment assembly 400 is installed at one end of the movable support guide plate 102. The lifting adjustment assembly 400 includes: a movable bolt 401, one end of which is rotatably connected to one end of the movable block 107; a lifting guide column 402 is installed on the movable bolt 401; a lifting hydraulic cylinder 403 is installed at the lower end of the lifting guide column 402; the lower end of the lifting hydraulic cylinder 403 is connected to the upper end of the connecting block 404 by screws; a rotating bolt 405 is installed inside the connecting block 404, and the rotating bolt 405 is rotatably connected to the movable support guide plate 102. In practical use, the base plate 101 of the support assembly 100 is first installed on the ground or platform. When the vibrator assembly 200 needs to be installed and tested on other structures, the lifting hydraulic cylinder 403 drives the lifting guide column 402 to move up and down, which in turn drives the moving block 107 to move up and down. The moving block 107 then moves up and down inside the moving support guide plate 102 and slides up and down outside the guide support rod 106. The movable bolt 401 and the rotating bolt 405 can rotate, further driving the vibrator assembly 200 to adjust its height. When the vibrator assembly 200 is on the support assembly... When adjusting the height of component 100, the installation height of the exciter is adjusted so that the exciter assembly 200 can be raised and lowered as needed, ensuring that its height position matches that of the structure under test. The exciter is installed on or near the structure under test to ensure that the vibration of the exciter can be effectively transmitted to the test part of the structure. The exciter is connected to the control system via a cable. The control system is responsible for generating excitation signals and adjusting the output of the exciter. The excitation signal can be a sine wave, pulse, random signal, etc., and the specific selection depends on the test purpose. The response of the structure under test is collected in real time by sensors (such as accelerometers, displacement sensors, etc.) installed on the structure. These response signals are then sent to the data acquisition system.

[0021] By using the lifting hydraulic cylinder 403 to move the guide column, moving block 107, and guide rail plate up and down, the precise position adjustment of the vibrator assembly 200 can be achieved. The vibrator is precisely aligned with the height of the structure under test during installation, ensuring that the relative position between the vibrator and the structure under test meets the test requirements. The height adjustment of the vibrator can be completed in a short time, improving the overall test efficiency. This avoids the need to use a push rod for installation and connection when the height distance between the vibrator and the test structure is too far, and avoids using a push rod as a connection medium, preventing the introduction of additional rigidity or damping effects, changing the characteristics of the excitation force, and reducing the vibration transmission efficiency.

[0022] like Figure 1-2 , Figure 4 As shown, a clamping groove 103 is provided at one end of the movable support guide plate 102. A lead screw 301 slides through the clamping groove 103. One end of the lead screw 301 is welded to one end of the movable block 107. A clamping plate 303 passes through the outer side of the lead screw 301. A nut handle 302 is provided on one side of the clamping plate 303. The nut handle 302 is rotatably connected to the outer side of the lead screw 301. In actual use, when the movable block 107 and the vibrator assembly 200 are adjusted in height, the operator rotates the nut handle 302 and rotates and tightens the lead screw 301 on the outer side, further squeezing and clamping the clamping plate 303 to one side of the movable support guide plate 102, further ensuring that the movable block 107 and the vibrator assembly 200 maintain a stable function. The lead screw 301 can move together with the movable block 107 and move within the clamping groove 103.

[0023] When the moving block 107 and the vibrator assembly 200 are moved and adjusted in height, the operator can rotate the nut handle 302 and tighten it on the outside of the screw 301 to further squeeze and clamp the clamping plate 303 to one side of the moving support guide plate 102, thereby ensuring that the moving block 107 and the vibrator assembly 200 maintain a stable function.

[0024] This utility model provides a modal exciter testing device, the specific working principle of which is as follows: First, the base plate 101 of the support assembly 100 is installed on the ground or platform. When the exciter assembly 200 needs to be installed and tested on other structures, the lifting hydraulic cylinder 403 drives the lifting guide column 402 to move up and down, further driving the moving block 107 to move up and down. The moving block 107 then moves up and down inside the moving support guide plate 102, and slides up and down on the outside of the guide support rod 106. The movable bolt 401 and the rotating bolt 405 can rotate, further driving the exciter assembly 200 to adjust its height. When the exciter... When component 200 moves up and down on support component 100 to adjust its height, the installation height of the exciter is adjusted so that the exciter component 200 can be raised and lowered as needed, ensuring that its height position matches that of the structure under test. The exciter is installed on or near the structure under test to ensure that the vibration of the exciter can be effectively transmitted to the test part of the structure. The exciter is connected to the control system via a cable. The control system is responsible for generating excitation signals and adjusting the output of the exciter. The excitation signal can be a sine wave, pulse, random signal, etc., and the specific selection depends on the test purpose. The response of the structure under test is collected in real time by sensors (such as accelerometers, displacement sensors, etc.) installed on the structure. These response signals are then sent to the data acquisition system.

[0025] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A modal exciter testing device, comprising a support assembly (100), characterized in that: The support assembly (100) includes: a base plate (101), a movable support guide plate (102) fixedly installed on the upper end of the base plate (101), a sliding groove (104) opened inside the movable support guide plate (102), a movable block (107) slidably connected inside the sliding groove (104), a fixed guide post (109) fixedly installed at one end of the movable block (107), one end of the fixed guide post (109) installed at one end of a fixed plate (108), one end of the fixed plate (108) connected to the outside of the vibrator assembly (200) by screws, and a guide support rod (106) moving through the movable block (107), the guide support rod (106) fixedly installed inside the movable support guide plate (102).

2. The modal exciter testing device according to claim 1, characterized in that: The upper end of the movable support guide plate (102) is provided with a limiting block (105), and the limiting block (105) is fixed by screws.

3. The modal exciter testing device according to claim 2, characterized in that: A lifting adjustment assembly (400) is installed at one end of the movable support guide plate (102). The lifting adjustment assembly (400) includes a movable bolt (401), one end of which is rotatably connected to one end of the movable block (107).

4. The modal exciter testing device according to claim 2, characterized in that: The movable bolt (401) is equipped with a lifting guide column (402), and a lifting hydraulic cylinder (403) is installed at the lower end of the lifting guide column (402). The lower end of the lifting hydraulic cylinder (403) is connected to the upper end of the connecting block (404) by screws. A rotating bolt (405) is installed inside the connecting block (404), and the rotating bolt (405) is rotatably connected to one end of the movable support guide plate (102).

5. The modal exciter testing device according to claim 1, characterized in that: One end of the movable support guide plate (102) is provided with a clamping groove (103), and a lead screw (301) slides in the clamping groove (103).

6. The modal exciter testing device according to claim 5, characterized in that: One end of the lead screw (301) is welded to one end of the moving block (107). A clamping plate (303) passes through the outside of the lead screw (301). A nut handle (302) is provided on one side of the clamping plate (303). The nut handle (302) is rotatably connected to the outside of the lead screw (301).

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