帶彈性材料涂層的顆粒阻尼器的機(jī)理研究
[Abstract]:Particle damping is a new technique for passive control of vibration. it is mainly formed by placing metal or non-metal particles in a cavity or an additional cavity of the vibration structure according to a certain filling rate, and when the mechanical structure is excited to generate vibration, the particles and the particles and the cavity wall can be caused to generate friction and impact, Meanwhile, the momentum exchange, the friction heat generation and the noise radiation are continuously carried out, so that the vibration energy of the system is consumed, and the purpose of vibration reduction and noise reduction is achieved. As the particle damping has the characteristics of obvious damping effect, simple structure, low cost, convenient operation and the like, the novel vibration control technology has wide application and development space in the future. At present, the research on the particle damping is mainly based on the experiment, the theoretical research is not deep enough, and the research on the optimization of the design parameters of the particle damper is not perfect. According to the characteristics of this technology, the theory of particle damping is studied and verified by experiment. At the same time, a kind of particle damper with elastic material coating is put forward, and the theoretical and experimental analysis is carried out. The main work of this paper is as follows: (1) The theoretical model of particle damping collision and friction energy consumption is set up, and the effect of each parameter of the damper on the energy dissipation effect is analyzed by using Matlab to calculate the energy consumption model. (2) In combination with the characteristics of the viscoelastic material and the damping mechanism of the particle damping, a kind of particle damper with elastic material coating is put forward, and the energy consumption model of the new type damper is established and compared with the conventional particle damper. (3) The effect of various parameters on the damping effect is studied by the particle damping experiment, and the damping capacity of the particle damper with no elastic material coating is compared, and the accuracy of the theoretical research is verified. (4) The influence of each parameter of the particle damper on the vibration noise was studied by the noise test experiment. The noise level of the two particle dampers is compared, and the noise reduction capability of the particle damper with the elastic material coating is verified.
【學(xué)位授予單位】:東北大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2014
【分類號(hào)】:TB535
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