一种可调频动力吸振器的设计与研究

发布时间：2018-08-04 13:02

【摘要】：针对实际生产生活的吸能减振问题,本课题在前人研究优化的C型弹簧吸振器的基础上,进一步将阻尼元件添加在吸振器中,完成进一步吸振的目的。C型弹簧吸振器的对振动平台的吸振效果使用随机振动激励来分析,把吸振器安装在平台的对称边界处模拟发现,使得振动能量波向吸振器移动,吸振效果最好。在C型弹簧吸振器中添加上下阻尼元件会进一步增加吸振效果,但要求上下阻尼元件要同时存在。经过对上下阻尼的位置与阻尼大小进行优化,发现当固定下阻尼改变上阻尼大小时,上阻尼的值越大,平台吸振器系统的最大振动幅度越小;当固定上阻尼改变下阻尼大小时,下阻尼的值越小,平台吸振器系统的最大振动幅度越小,最后的最优配合比为上阻尼大小为3000N/(mm/s),下阻尼大小为800N/(mm/s)。随着C型宽度的增加,平台吸振器系统的最大振幅不断减小,而且最大振幅幅值与C型弹簧宽度的关系呈现线性关系。经过优化的阻尼大小配比能够为C型弹簧的设计提供理论与数据参考,对减振吸能领域的技术研究有着重要理论参考价值。
[Abstract]:In view of the problem of energy absorption and vibration absorption in practical production and life, based on the research and optimization of C type spring vibration absorber, the damping element is further added to the vibration absorber. The purpose of further vibration absorption is to use random vibration excitation to analyze the vibration absorption effect of the C type spring vibration absorber, and to install the vibration absorber at the symmetrical boundary of the platform to simulate and find that the vibration energy wave moves to the vibration absorber. The effect of vibration absorption is the best. Adding upper and lower damping elements to the C type spring absorber will further increase the effect of vibration absorption, but it is required that the upper and lower damping elements exist at the same time. By optimizing the position and damping size of the upper and lower damping, it is found that the larger the damping value is, the smaller the maximum vibration amplitude of the platform vibration absorber system is when the damping is changed under the fixed damping, and when the damping is changed under the fixed damping, the maximum vibration amplitude of the platform vibration absorber system is smaller. The smaller the value of lower damping is, the smaller the maximum vibration amplitude of platform absorber system is. The final optimal mix ratio is 3000N/ (mm/s) for upper damping and 800N/ (mm/s) for lower damping. With the increase of C-type width, the maximum amplitude of the platform vibration absorber system decreases continuously, and the relationship between the maximum amplitude and the C-type spring width is linear. The optimized damping ratio can provide theoretical and data reference for the design of C-type spring. It has important theoretical reference value for the study of vibration and energy absorption technology.
【学位授予单位】：北方工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TB535.1

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