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Large vibration test assembly

A technology of vibration test and tooling, which is applied in the direction of vibration test, measuring device, machine/structural component test, etc. It can solve the problems of long manufacturing cycle, difficult molding, and difficult cost, so as to reduce consumption, save test cost, and reduce cost Effect

Active Publication Date: 2017-01-11
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For large-scale aerospace product vibration test tooling, in order to meet its rigidity and weight requirements, most of the domestic casting flowerpot structures are currently used. For complex tooling structures, it is difficult to form, the manufacturing cycle is long, and the cost is difficult to control.
At present, domestic large-scale vibration test benches are scarce and the test costs are expensive. The most effective way to increase the stiffness of vibration test fixtures is to increase the size of the installation interface with the vibration table. Therefore, it is necessary to develop a three-way vibration test that can be carried out on a horizontal vibration slide. The tooling can not only improve the use efficiency of the vibration table, but also reduce the types of vibration test tooling and save the test cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] see figure 1 , Figure 5 and Figure 7 , a large-scale vibration test fixture includes a fixture main body 1, a drilling mold 2 and a spreader 3.

[0037] see Figure 5 and Figure 6 , the tooling main body 1 is a box-shaped structure, the bottom surface is wide and the top surface is narrow, the length direction is an antisymmetric structure, the weight is 670Kg, and the maximum external dimension is length * width * height = 2623mm * 1175mm * 1376mm.

[0038] The top of the tooling body 1 is a U-shaped groove structure, one end of the U-shaped groove structure is an end face flange interface 11, the middle part is provided with a radial flange interface 10, and the two sides of the opening are side flange interfaces 9; the tooling body 1 The bottom of the bottom is provided with a horizontal installation flange interface 7; the middle part of one side of the tooling main body 1 in the adjacent orthogonal direction is provided with a vertical installation flange in...

Embodiment 2

[0046] For horizontal axial vibration test, see figure 2 , the installation relationship between the tooling main body 1 and the tested product is the same as in Example 1. After completing a horizontal vibration test, the tooling main body 1 is rotated 90 degrees in the horizontal plane by means of the sling 3, the sling 14, and the lifting lug 15, and the tooling main body 1 The horizontal mounting flange 7 at the bottom is installed on the horizontal workbench of the vibration test bench 16, and the inspection and test contents before and after the vibration test of Embodiment 1 are repeated.

Embodiment 3

[0048] For vertical vibration tests, see image 3 , with the help of the spreader 3, the sling 14, and the lifting lug 15, the main body of the tooling 1 is turned 90 degrees laterally, and the main body of the tooling 1 is installed on the horizontal workbench of the vibration test bench 16 through the vertical mounting flange 8 on the side, and Example 1 is repeated. Inspection and test content before and after the vibration test.

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Abstract

The present invention relates to a large vibration test assembly. The test assembly comprises an assembly body, a drilling mold and a spreader. The assembly body is box-shaped with a wide bottom surface and a narrow top surface. The top part of the assembly body is provided with a U-shaped groove, and the length direction of the assembly body is an anti-symmetrical structure. The drilling mold is coordinated and disposed in the U-shaped groove. The inherent frequency of the first order of the assembly body is 3 to 5 times larger than that of a to-be-tested product. The vibration response of the assembly body in the orthogonal direction is not larger than one third of the vibration order in the vibration excitation direction. In a vibration test, the assembly body is disposed on a horizontal vibration test table. The drilling mold is detached, the support structure of the to-be-tested product is mounted inside the U-shaped groove, and the shaping mechanism of the to-be-tested product is mounted to one side end surface of the assembly body in the length direction. The test assembly enables two vibration tests in the horizontal direction and one vibration test in the vertical direction, reduces consumption of the vibration test table, reduces vibration test cost, and saves test cost by about 500 thousand yuan.

Description

technical field [0001] The invention belongs to the technical field of vibration test, and in particular relates to a tool for vibration test of aerospace products. Background technique [0002] Aerospace products undergo complex dynamic loads during the launch phase. In order to verify the mechanical environment adaptability of aerospace products, it is necessary to carry out a complete mechanical environment adaptability test in the laboratory environment. Reasonable vibration test tooling design plays an important role in the effectiveness of the mechanical environment test. . According to statistics, the failure of aerospace products during the launch phase accounts for 23% of all failures; among the failure or failure factors in ground environmental tests, vibration factors account for 35%. [0003] Usually, the frequency range of sinusoidal vibration of aerospace products is 5~100Hz, and the frequency range of random vibration is 20~2000Hz. In order to minimize the in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02
CPCG01M7/02G01M7/027
Inventor 程林吴文志王志海彭超
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST