A kind of test device and test method for multidirectional impedance matrix and stiffness test of vibration isolator

A technology of impedance matrix and test device, which is applied in the direction of measuring device, vibration test, machine/structural component test, etc., can solve the problem that static load cannot be applied, and achieve the effect of simple and clear test principle, realization of loading, and simple test device

Active Publication Date: 2017-10-31
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Indirect test methods include admittance identification method【[13]Kim, S., Singh, R.Multi-dimensionalcharacterization of vibration isolators over a wide range of frequencies.Journal of Sound and Vibration,245(5):877-913,2001. ], but this method cannot apply static load

Method used

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  • A kind of test device and test method for multidirectional impedance matrix and stiffness test of vibration isolator
  • A kind of test device and test method for multidirectional impedance matrix and stiffness test of vibration isolator
  • A kind of test device and test method for multidirectional impedance matrix and stiffness test of vibration isolator

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Embodiment 1

[0074] Such as figure 1 As shown, a vibration isolator test device is disclosed, which is used to detect the vertical and horizontal and bending impedance and stiffness of the vibration isolator 1 under loading, including the left end mass 2, the right end mass 3, the left end elastic thin Rope 4, left end air spring 5, left end support frame 6, floating platform 7, right end elastic thin rope 8, right end air spring 9, right end support frame 10, vibrator 11, impedance head 12, acceleration sensor 13, data acquisition instrument 14 And computer 15, wherein, the two ends of described vibration isolator 1 to be tested are respectively connected left end mass block 2 and right end mass block 3; The left end of the left-end quality block 2 is connected to the 4-12 left-end air springs 5; the left-end air spring 5 is fixed to the side of the left-end support frame 6 by bolts; the bottom of the left-end support frame 6 is fixed by bolts On the floating platform 7; the upper part o...

Embodiment 2

[0084] A vibration isolator test method, which is used to detect the longitudinal and transverse and bending impedance and stiffness of the vibration isolator 1 under loading, and the above-mentioned test device is used for detection, wherein the impedance of the vibration isolator 1 is three-dimensional in the xoy plane The specific test process steps for the degrees of freedom are as follows:

[0085] The first step is to obtain the admittance matrix of the left-end mass 2 and the right-end mass 3 through theoretical calculation or actual test;

[0086]The second step is to use the vibration isolator 1 test device to inflate the left air spring 5 and the right air spring 9. When the rated static load is reached, the vibration exciter 11 is used to excite some excitation points on the right mass block 3. The acceleration sensor 13 arranged at a specific position and the impedance head 12 at the ejector rod of the vibrator 11 test the vibration and excitation force, and obtain...

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Abstract

The invention provides a test device and test method for testing the multidirectional impedance matrix and the rigidity of a vibration isolator. The device and the method are used for detecting the transverse and longitudinal impedance, bending impedance, the transverse and longitudinal rigidity, and the bending rigidity of the vibration isolator to be detected in a loaded state. The device comprises a left counterweight block, a right counterweight block, a left elastic fine rope, left air springs, a left support frame, a floating platform, a right elastic fine rope, right air springs, a right support frame, a vibration exciter, an impedance head, an acceleration sensor, a data acquisition instrument and a computer. The test device and test method for testing the transverse and longitudinal impedance, the bending impedance, the transverse and longitudinal rigidity, and the bending rigidity of the vibration isolator consider a static load effect on the vibration isolator, easily apply the static load by adjusting the air pressure of the air springs in order to obtain vibration isolator rigidity approximate that in a real operating state.

Description

technical field [0001] The invention relates to the technical field of vibration isolator testing, in particular to a multidirectional impedance matrix and stiffness testing device and testing method for a vibration isolator. Background technique [0002] Vibration isolators are widely used in vibration isolation of mechanical equipment. The dynamic stiffness and impedance that determine the vibration isolation performance of the vibration isolator are its key parameters. The dynamic stiffness and impedance are not only related to the material and structure, but also related to the load and frequency it bears. From the perspective of theoretical modeling, only the magnitude of stiffness and impedance of the vibration isolator can be predicted, and accurate values ​​need to be obtained through testing. From the perspective of dynamic response, the vibration isolator works in the state of three-way transverse deformation and complex bending deformation, and its transverse imp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M7/06
Inventor 黄修长徐时吟华宏星
Owner SHANGHAI JIAO TONG UNIV
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