带弹性涂层的颗粒阻尼器阻尼特性实验研究

发布时间：2018-05-14 08:48

本文选题：弹性涂层 + 颗粒阻尼　；参考：《东北大学》2014年硕士论文

【摘要】：颗粒阻尼(Particle Damping)技术利用在振动体中有限封闭空间内填充的微小颗粒间摩擦与冲击作用消耗系统振动能量,具有耐久性好、可靠度高、对温度变化不敏感,适用于恶劣环境等优点。颗粒阻尼器为附加质量式被动阻尼器,可增加结构阻尼。该技术在机械和航空航天领域应用较多,但其减振机理未被很好解释。本文将对非阻塞性颗粒阻尼这一被动振动控制技术作进一步的研究,主要包括以下几个方面：(1)对弹性涂层阻尼颗粒间以及弹性涂层阻尼颗粒与阻尼容器问的碰撞与摩擦耗能进行分析。(2)对悬臂梁模型进行实验,观察并分析弹性涂层颗粒阻尼方法对系统振动的抑制作用。(3)针对现今在颗粒阻尼方法的实际应用中仍没有确定的设计应用准则这一问题,对影响颗粒阻尼方法抑制系统振动效果的各个影响因素,利用悬臂梁模型进行振动实验。测试、观察并总结出各个因素对颗粒阻尼方法减振效果的影响趋势,从而得出与相应影响因素相关的在实际应用中的设计应用准则。(4)为基于悬臂梁的颗粒阻尼器设计了完善的实验方案,以验证所设计的弹性涂层颗粒阻尼器的减振效果及其影响因素。实验证明：弹性涂层颗粒阻尼具有更好的减振效果,可提高其各阶阻尼比,并减小振幅,耗散振动能量。但弹性涂层颗粒阻尼属于高度非线性的力学行为,因此,受到诸多外界条件因素的耦合影响。在进行具体工况的阻尼器设计时,应尽量考虑各影响因素而具体设计。
[Abstract]:Particle damping Particle Dampingtechnology consumes system vibration energy by friction and impact between tiny particles filled in a finite enclosed space in a vibrating body. It has good durability, high reliability, and is insensitive to temperature change. Suitable for harsh environment and other advantages. Particle dampers are additional mass passive dampers, which can increase structural damping. This technique is widely used in mechanical and aerospace fields, but the mechanism of vibration reduction is not well explained. In this paper, the passive vibration control technique of non-obstructive particle damping is further studied. It mainly includes the following aspects: (1) the analysis of the impact and friction energy dissipation between the damping particles of the elastic coating and the damped container. (2) the experiment of the cantilever beam model is carried out. The effect of particle damping method of elastic coating on system vibration is observed and analyzed. (3) aiming at the problem that there is still no definite design application criterion in the practical application of particle damping method at present, The effects of particle damping method on the vibration effect of the system were studied by means of cantilever beam model. Test, observe and summarize the influence trend of various factors on the damping effect of particle damping method. It is concluded that the design and application criterion of practical application, which is related to the corresponding influence factors, is a perfect experimental scheme for the particle damper based on cantilever beam. The effect of the designed elastic coating particle damper and its influencing factors are verified. The experimental results show that the elastic coating particle damping has a better damping effect, which can increase the damping ratio of each order, decrease the amplitude and dissipate the vibration energy. However, the particle damping of elastic coating is a highly nonlinear mechanical behavior, so it is influenced by many external factors. In the design of dampers under specific working conditions, the factors should be taken into account as far as possible.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB535

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