Variable mass vibration test device

Abstract

The invention provides a variable mass vibration test device. The variable mass vibration test device comprises a vibration excitation system, a variable mass system and a traction system, the vibration excitation system comprises a vibration table and a test tool, the test tool is horizontally arranged, and the top of the vibration table is fixedly connected with the bottom of the test tool; the variable mass system comprises a fixed mass block and a sliding mass block, and the fixed mass block and the sliding mass block are sequentially arranged in the main vibration direction; the fixed mass block is fixedly connected with the top of the test tool, the sliding mass block is in sliding fit with the top of the test tool, and the sliding mass block moves back and forth in the main vibration direction; an electromagnet is arranged on the side, close to the sliding mass block, of the fixed mass block and matched with the sliding mass block in a magnetic attraction mode. The traction system is fixedly connected with the side, away from the fixed mass block, of the sliding mass block. According to the invention, the vibration environment simulation of the variable mass structure can be realized, and the multi-time separated variable mass test can be carried out, so that the use expansibility can be improved.

Description

technical field [0001] The invention relates to the technical field of vibration environment simulation test, in particular to a variable-mass vibration test device. Background technique [0002] Vibration test is the most common and effective test method to assess the rationality of structural design and expose potential product failures. Especially for vehicles such as aerospace, rail transit, and automobiles, vibration tests that simulate their actual working conditions are essential. [0003] In the conventional vibration test process, the test piece is usually a structural part, and must be firmly installed on the moving coil of the shaking table or the horizontal slide table, and the test piece is not allowed to move uncontrollably during the vibration test. When the test piece is a mechanism, the composition of the test piece will move relatively, making it difficult to control the vibration test according to the given conditions or the control curve is obviously out...

AI Technical Summary

Problems solved by technology

[0006] The inventor believes that in the laboratory to simulate the composite environmental test of a given vibration environment and separation acceleration, the vibration test field of the prior art in this vibration environment is not enough to meet the requirements of the variable mass vibration test, and it is necessary to provide a more reasonable Test device

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