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Method for predicting vibration fatigue performance of viscoelastic material

A technology of vibration fatigue and material properties, applied in the direction of testing material strength by applying repetitive force/pulsation force

Active Publication Date: 2013-03-06
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this patent mainly focuses on the stable control of the applied stress during the vibration fatigue test, and does not involve the prediction of the vibration fatigue performance of viscoelastic materials

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  • Method for predicting vibration fatigue performance of viscoelastic material
  • Method for predicting vibration fatigue performance of viscoelastic material
  • Method for predicting vibration fatigue performance of viscoelastic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Predict the vibration fatigue performance of a viscoelastic damping material applied to the equipment foundation as follows:

[0051] 1) According to the actual environment of the viscoelastic damping material, it is determined that the stress mode of the vibration fatigue test sample is tensile fatigue, the deformation is 20 μm, and the tensile fatigue test is controlled by vibration amplitude;

[0052] 2) According to the way of tensile force, determine the shape of the required viscoelastic damping material as a long strip, and the size is about 15mm×5mm×2mm;

[0053] 3) According to the environment of the viscoelastic material, the vibration test conditions are determined: temperature 20°C, vibration fatigue cycle 250,000 times, vibration amplitude 20 μm, vibration frequency 30 Hz, and the test data acquisition cycle is once every 10,000 vibration fatigue cycles. Sinusoidal excitation signal;

[0054] 4) Vibration fatigue test is carried out, if necessary, the test...

Embodiment 2

[0062] Predict the vibration fatigue performance of a constrained viscoelastic damping material applied to a certain equipment as follows:

[0063] 1) According to the actual environment of the viscoelastic damping material, it is analyzed that the stress mode of the vibration fatigue test sample is shear deformation, the deformation is 60 μm, and the deformation is 0.005%. It is determined that the shear fatigue test is controlled by the vibration amplitude, and the deformation is 0.005%;

[0064] 2) According to the shear force mode, determine the shape of the required viscoelastic damping material to be the original columnar shape, and the size is about φ10mm×2mm;

[0065] 3) According to the environment of the viscoelastic material, determine the vibration test conditions: temperature 25°C, vibration fatigue cycle 5 million times, vibration amplitude 0.005%, vibration frequency 10Hz, test data acquisition cycle is once every 10,000 vibration fatigue cycles, Using a sinuso...

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Abstract

The invention discloses a method for predicting the vibration fatigue performance of a viscoelastic material. The method comprises the following steps of: processing the viscoelastic material of which the vibration fatigue performance is to be predicted to a material with the size needed by a viscoelastometer; determining the stress mode, temperature, deformation vibration amplitude and the like of a vibration fatigue test sample according to the state of the material in the actual service environment; performing a vibration fatigue test; acquiring various performance parameters of the material after every fixed cycle fatigue period; analyzing the acquired performance parameters of the viscoelastic material; and predicting the long-term performance and life cycle of the material. By the method, the vibration fatigue performance of the viscoelastic material can be acquired and the long-term performance of the viscoelastic material under vibration fatigue and service life can be predicted.

Description

technical field [0001] The invention relates to a material performance evaluation and prediction technology, in particular to a method for predicting the vibration fatigue performance of a viscoelastic material. Background technique [0002] Viscoelastic materials are widely used in vibration and noise reduction engineering to attenuate vibration energy and convert it into heat or other forms. However, the performance of viscoelastic materials will change under the condition of vibration fatigue. It is very important to accurately obtain the changes of these properties and predict their long-term performance. This will give better play to the performance of the material and provide The full-cycle management of materials provides a solid guarantee. [0003] The parameters commonly used to characterize the dynamic mechanical properties of viscoelastic materials are dynamic complex modulus (referred to as complex modulus) and loss factor, which are commonly used to indicate th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/32
Inventor 王兵张晓玲李宏伟王雯霏
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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