《机电工程》杂志社科技期刊核心期刊论文投稿机电一体化机械、仪表电工自动化、计算机浙江大学主办

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Research on interface vibration energy transfer loss of composite structures

Published:2022-12-20 author:WANG Peng, LIANG Guo-xing, LV Ming, et al. Browse: 1145 Check PDF documents

Research on interface vibration energy transfer loss of composite structures

WANG Peng1, LIANG Guo-xing1,2, LV Ming1,2,

HUANG Yonggui1,2, ZHAO Jian1,2, YUE Chun-yu1

(1.School of Mechanical and Transportation Engineering, Taiyuan University of Technology, Taiyuan 030000, China;

2.Shanxi Provincial Key Laboratory of Precision Machining, Taiyuan University of Technology, Taiyuan 030000, China)

Abstract: Aiming at the problem that the vibration generated during the working process of the machine tool affects the machining accuracy of the machine tool, a new type of high damping material was needed to replace the traditional machine tool bed material. Therefore,the interfacial vibration energy transfer loss of the resin and aggregate composite structures of different aggregate thicknesses was studied. Firstly, the mathematical model and stress wave energy calculation method of resin, aggregate and resin-aggregate composite material were constructed in combination with stress wave theory.Then, the vibration displacement curve of the mass point of the specimen section at the output end of the stress wave was measured by the impact test of the free pendulum at both ends, and the model parameters were obtained by fitting the vibration displacement curve. Finally, the attenuation coefficient of plane simple harmonic propagation was used to exponentially amplify the vibration displacement curve of the particle at the input end, the vibration displacement curve of the particle at the input end was obtained. The energy loss of stress wave propagation was calculated by the vibration displacement curve of the specimen section at the output end and the input end of the stress wave. The results show that with the increase of aggregate thickness, the interfacial vibration energy transfer loss of the composite material increases first and then decreases, and when the aggregate content is between 25% and 50%, the vibration energy transfer loss of the composite material interface is higher. Therefore, when actually preparing highly damped, vibrationdamping resin mineral composites, the aggregate system should account for the overall volume content between 25% and 50%.

Key words: material of machine bed; mechanical vibration; resin mineral composite; vibration mechanics model; stress wave energy calculation method; material interface vibration; pendulum impact test

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