Accelerated test method for storage life of vibration isolators

Abstract

The invention discloses an accelerating test method for the shelf lives of vibration isolators. The method comprises the following steps: randomly selecting a plurality of vibration isolators, and carrying out simulation fixture vibration tests at different aging temperatures to obtain an original curve of the damping ratio and the aging time of each vibration isolator at different aging temperatures; determining a fitting function of the damping ratio and the aging time of each vibration isolator at different aging temperatures in a fitting way to obtain the mean pseudo-shelf life of the vibration isolators at different aging temperatures; determining the shelf lives of the vibration isolators according to the mean pseudo-shelf life of the vibration isolators at different aging temperatures and the temperatures in combination with a vibration isolator accelerating model. According to the accelerating test method for the shelf lives of vibration isolators disclosed by the invention, real, credible and high-reference-value shelve lives of the vibration isolators can be obtained.

Description

technical field [0001] The invention relates to the technical field of elastic device testing and life evaluation, in particular to an accelerated test method for the storage life of a vibration isolator. Background technique [0002] The vibration environment is inevitable when the precision instrument is working. The vibration isolator is used to isolate the vibration of its key device (precision measuring device) when the precision instrument is working. The precision instrument is usually in a storage state, and the vibration isolator affects the storage period of the precision instrument. One of the key weak links, if the vibration isolator does not meet the storage period requirements of precision instruments, strictly speaking, the precision instruments cannot be finalized. Generally, the storage life of the vibration isolator is determined by the accelerated test method. [0003] Precision instruments are stored in a box filled with nitrogen and kept slightly higher...

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Problems solved by technology

[0004] The determination of the failure criteria of general accelerated tests is given by experience or by referring to other similar products. If the failure criteria cannot be accurately determined, it will affect the final evaluation result

[0005] The accelerated aging test and test of the vibration isolator need to simulate the actual storage and use state. The vibration isolator is installed in the actual precision instrument to be the most realistic, but the cost is too high; the entire precision instrument is too large to be accelerated in the test box aging test

Moreover, the sample size is extremely limited, and a large number of samples cannot be put into the test, so that credible results cannot be obtained; and the process of carrying out the vibration test of large precision instruments is quite complicated

[0006] The general acceleration test is carried out with a single vibration isolator or a single vibration isolator compression test piece as the test object. There is no similar research on the difference between the two results and whether there is an equivalence relationship between them.

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