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Vibration system comprising plurality of vibration tables and vibration test method

A vibration system and vibration test technology, applied in vibration testing, machine/structural component testing, measuring devices, etc., can solve problems such as under-testing, over-testing of the tested piece, and influence on the reliability evaluation of the tested product, so as to achieve incentives Uniform energy distribution, avoiding local stress concentration, and avoiding the effect of eccentric moment

Active Publication Date: 2020-03-20
BEIJING RES INST OF MECHANICAL & ELECTRICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a vibration system and a vibration test method including multiple vibration tables, so as to solve the problem that the existing vibration system cannot realize multiple uniaxial vibration environments in the laboratory, so that the tested There are problems that have been tested or under-tested, which affect the reliability evaluation of the tested product

Method used

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  • Vibration system comprising plurality of vibration tables and vibration test method
  • Vibration system comprising plurality of vibration tables and vibration test method
  • Vibration system comprising plurality of vibration tables and vibration test method

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Embodiment 1

[0058] A specific embodiment of the present invention discloses a vertical vibrating system for the character "one" of three vibrating tables, such as Figure 1-4As shown, it includes test piece 1, shaking table system, mechanical decoupling system, test fixture 4, sensor 5, elastic suspension device 6, gantry frame 7, crane hook 8, industrial computer 9 and control system.

[0059] The vibrating table system is the main part of the whole vibrating device. The vibrating table system of this embodiment includes three vertical vibrating tables 2 distributed in a "one" shape, three vibrating table supports and supporting power amplifiers and cooling systems. Each vibrating table is mounted on a vibrating table support. The structure of the vibrating table supports is the same, and they are respectively used to support three vertical vibrating tables. Three vibrating tables simultaneously provide vibration excitation in the vertical direction. The vibrating table can be an ordin...

Embodiment 2

[0073] In the vibration test, it is hoped that the vibration table can transmit the vibration energy to the test product to the maximum extent, and the fixture plays the role of simulating the geometric boundary conditions and dynamic characteristic conditions of the test product. The three "one" vibration tests need to transmit the vibration in the same direction. It is required that the fixture can transmit the vibration in the vertical direction of the three vibration tables at the same time, and can be closely connected with the decoupling devices of the three vibration tables. On the basis of the requirements of high order frequency and uniform density distribution, the transferability of the fixture must be good, it must be able to truly reflect the actual transmission force, and it must also take into account the adjustability and operability of the installation. The method of dynamic simulation analysis should be used in fixture design, especially for complex tests and ...

Embodiment 3

[0083] Yet another specific embodiment of the present invention discloses a vibration test method, comprising the following steps:

[0084] Step 1: Set the excitation points at the front, middle and rear of the test piece respectively, each excitation point is equipped with a vibration table, and the three vibration tables are arranged in the word "one";

[0085] Step 2: Install decoupling joints on the top of the three vibrating tables;

[0086] Step 3: After connecting the three sets of snap ring fixtures with the test piece, install them on the decoupling joints of the three shaking tables respectively to realize the connection with the shaking table;

[0087] Step 4: Install the suspension device;

[0088] Step 5: Check whether the test piece is firm;

[0089] Step 6: Paste sensors on the parts with higher rigidity near the three fixtures and the outer wall of the test piece, and connect the sensors to the control system with cables;

[0090] Step 7: Connect other test ...

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Abstract

The invention relates to a vibration system comprising a plurality of vibration tables and a vibration test method, belongs to the technical field of vibration tests, and solves the problems that in the prior art, a vibration system cannot realize multiple uniaxial vibration environments in a laboratory, so that a tested part is subjected to an over-test or an under-test, and the reliability evaluation of a tested product is influenced. The vibration system comprises a test part, a vibration table system, a mechanical decoupling system, a test fixture, a sensor and a vibration control system.The vibration test method comprises the following steps: arranging excitation points, and installing a test part, a test fixture and a mechanical decoupling device; pasting a sensor on the test part;setting random vibration test conditions and a control mode; collection of test data. According to the invention, the vibration load distribution of the slender body structure test part is more uniform, reasonable and real, the stress concentration caused by single excitation is reduced, and the local under-test or over-test degree is reduced.

Description

technical field [0001] The invention relates to the technical field of vibration testing, in particular to a vibration system comprising a plurality of vibration tables and a vibration testing method. Background technique [0002] In aerospace, aviation, vehicle and other engineering fields, products work in a certain vibration environment, and structural resonance is one of the main reasons for failures during their operation. As an effective means to test product reliability and dynamic strength, vibration test has been widely used in product performance assessment and dynamic strength appraisal. [0003] For those slender and large complex structure test pieces, due to their large slenderness ratio and large differences in front, middle and back conditions, the multi-shaking table test method is more suitable for their vibration tests. However, due to the limitation of vibration test equipment and technology, it is impossible to realize multiple uniaxial vibration enviro...

Claims

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Application Information

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IPC IPC(8): G01M7/06G01M7/02
CPCG01M7/06G01M7/022G01M7/027Y02T90/00
Inventor 丁宁李军利任杰安
Owner BEIJING RES INST OF MECHANICAL & ELECTRICAL TECH
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