基于非阻塞性颗粒阻尼技术的填充颗粒对约束阻尼结构减振性能的影响
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

O328

基金项目:

国家自然科学基金项目(面上项目,重点项目,重大项目)


Influence of filled particles on vibration reduction performance of constrained damping structure based on non-obstructive particle damping technology
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    为使传统的约束阻尼结构的减振性能进一步提高,引入了非阻塞性颗粒阻尼技术,通过颗粒运动状态分析和悬臂梁试验研究了填充颗粒对基于非阻塞性颗粒阻尼技术的约束阻尼结构减振性能,探讨了颗粒填充率、粒径和密度对结构的振动响应、复合损耗因子等阻尼特性的影响规律。结果表明:随着填充率的增加,复合损耗因子呈先增大后减小的趋势,当填充率在50%时损耗因子最高为0.1447,提高了60.78%,振幅趋于平稳耗时0.2578s,此时颗粒成块状剧烈运动,阻尼效果最为理想;填充等直径钢球颗粒的粒径由0.8mm增至2.0mm,复合损耗因子仅增加0.0015,振幅趋于平稳耗时仅差0.0039s,对结构的减振性能无明显影响;填充不等直径的钢球颗粒的质量比为1:1时,复合损耗因子最大为0.1591,进一步提高了10%;填充颗粒质量相同时,密度小的材料减振效果最好,体积不变时,密度大的更佳。可见基于非阻塞性颗粒阻尼技术的填充颗粒能够提高约束阻尼结构的减振性能。

    Abstract:

    In order to further improve the vibration reduction performance of the traditional constrained damping structure, the non- obstructive particle damping technology is introduced. The vibration reduction performance of constrained damping structure based on non- obstructive particle damping technology was used to investigate by particle motion analysis and cantilever beam test, and the influence of particle filling rate, particle size and density on vibration response and composite loss factor of structure was discussed. The results show that with the increase of filling rate, the composite loss factor increases at first and then decreases. When the filling rate is 50%, the maximum loss factor is 0.1447, which increases by 60.78%. It takes 0.2578s for the amplitude to stabilize. At this time, the particles move violently in blocks, and the damping effect is the best. The particle size of filled steel ball with equal diameter increased from 0.8mm to 2.0mm, the composite loss factor increased by only 0.0015, and the time spent on stabilizing the amplitude was only 0.0039s, which had no obvious effect on the vibration reduction performance of the structure When the mass ratio of filled steel ball particles with different diameters is 1:1, the maximum composite loss factor is 0.1591, which is further improved by 10%. When the mass of filled particles is the same, the material with small density has the best vibration reduction effect, while the material with large density is better when the volume is unchanged. It is concluded that filled particles based on non- obstructive particle damping technology can improve the vibration reduction performance of constrained damping structure.

    参考文献
    相似文献
    引证文献
引用本文

孟凡迪,黄微波,桑英杰,等. 基于非阻塞性颗粒阻尼技术的填充颗粒对约束阻尼结构减振性能的影响[J]. 科学技术与工程, 2021, 21(13): 5210-5215.
Meng Fandi, Huang Weibo, Sang Yingjie, et al. Influence of filled particles on vibration reduction performance of constrained damping structure based on non-obstructive particle damping technology[J]. Science Technology and Engineering,2021,21(13):5210-5215.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2020-09-28
  • 最后修改日期:2020-12-29
  • 录用日期:2021-01-10
  • 在线发布日期: 2021-05-28
  • 出版日期:
×
律回春渐,新元肇启|《科学技术与工程》编辑部恭祝新岁!
亟待确认版面费归属稿件,敬请作者关注