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Method and device for testing dynamic stiffness of vibration isolator

A test method and vibration isolator technology, which is applied in vibration testing, measuring devices, testing of machine/structural components, etc., can solve problems such as inapplicable dynamic stiffness testing of large rated load vibration isolators, and achieve light structure and convenient operation , high-precision effect

Inactive Publication Date: 2014-05-21
JIANGSU UNIV OF SCI & TECH
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Problems solved by technology

None of the above three is suitable for the dynamic stiffness test of large rated load vibration isolators

Method used

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  • Method and device for testing dynamic stiffness of vibration isolator
  • Method and device for testing dynamic stiffness of vibration isolator
  • Method and device for testing dynamic stiffness of vibration isolator

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] A kind of vibration isolator dynamic stiffness testing method of the present invention comprises the following steps:

[0035]Step 1: Use a static loading device (CMT5305 microcomputer-controlled electronic universal testing machine, hereinafter referred to as electronic universal testing machine) to apply an axial load to the vibration isolator 3 (generator vibration isolator) with a rated load of 16kN, and the load size is F Equal to the rated load of the vibration isolator 3 of 16kN, the electronic universal testing machine automatically records the load F=16kN when the axial deformation of the vibration isolator 3 is δ=3.792mm, and the static stiffness of the vibration isolator 3 under the rated load is calculated k = F δ = 4.219 kN / ...

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Abstract

The invention discloses a method and a device for testing dynamic stiffness of a vibration isolator. The method comprises the steps of establishing an equivalent test model of a single-degree-of-freedom vibration system in a vibration isolation direction by using a static loading device, a combined vibration mass block and an elastic simply supported beam, measuring a frequency response function of the equivalent test model by an exciting method, and then indirectly obtaining the dynamic stiffness of the vibration isolator by virtue of a vibration equation, the similarity of the vibration system and the characteristics of the single-degree-of-freedom system. The method avoids the problem that the existing methods all need to simulate a rated load or a working load with an equivalent mass block in an ingenious way, and solves the problem that the test system is clumsy, high in test cost and test difficulty and even unachievable if the mass block is used for simulating high rated load or working load; the testing device is light and simple in structure, convenient to operate, and economical and practical; the method and the device are applicable to the dynamic stiffness tests of all single-axis vibration isolators, high in applicability, and especially capable of realizing testing of the dynamic stiffness of a large-rated load vibration isolator and ensuring high precision.

Description

technical field [0001] The invention relates to the technical field of engineering testing, in particular to a method and a device for testing the dynamic stiffness of a vibration isolator. Background technique [0002] The dynamic stiffness of a vibration isolator is its ability to resist deformation under dynamic load. It is a function of frequency and usually has obvious nonlinear characteristics. It is a key index to describe the vibration reduction performance of a vibration isolator. The dynamic stiffness test is an important part of the performance evaluation of the vibration isolator, and it is a test item that must be carried out before the vibration isolator is put into use. At present, the specific testing methods include the vibration excitation method and the hammering method. But no matter what method is used, it is necessary to use a mass block to simulate the rated load or working load. The mass block and the vibration isolator together form a spring mass sys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/00G01M7/02
Inventor 宋向荣沈超明杨文兴
Owner JIANGSU UNIV OF SCI & TECH
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