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几何非线性摩擦阻尼隔振系统动力学行为研究

刘兴天 陈树海 王嘉登 申军烽

刘兴天, 陈树海, 王嘉登, 申军烽. 几何非线性摩擦阻尼隔振系统动力学行为研究[J]. 力学学报, 2019, 51(2): 371-379. doi: 10.6052/0459-1879-18-302
引用本文: 刘兴天, 陈树海, 王嘉登, 申军烽. 几何非线性摩擦阻尼隔振系统动力学行为研究[J]. 力学学报, 2019, 51(2): 371-379. doi: 10.6052/0459-1879-18-302
Xingtian Liu, Shuhai Chen, Jiadeng Wang, Junfeng Shen. ANLYSIS OF THE DYNAMIC BEHAVIOR AND PERFORMANCE OF A VIBRATION ISOLATION SYSTEM WITH GEOMETRIC NONLINEAR FRICTION DAMPING[J]. Chinese Journal of Theoretical and Applied Mechanics, 2019, 51(2): 371-379. doi: 10.6052/0459-1879-18-302
Citation: Xingtian Liu, Shuhai Chen, Jiadeng Wang, Junfeng Shen. ANLYSIS OF THE DYNAMIC BEHAVIOR AND PERFORMANCE OF A VIBRATION ISOLATION SYSTEM WITH GEOMETRIC NONLINEAR FRICTION DAMPING[J]. Chinese Journal of Theoretical and Applied Mechanics, 2019, 51(2): 371-379. doi: 10.6052/0459-1879-18-302

几何非线性摩擦阻尼隔振系统动力学行为研究

doi: 10.6052/0459-1879-18-302
基金项目: 国家自然科学基金资助项目(51505294);国家自然科学基金资助项目(51875363)
详细信息
    作者简介:

    2) 刘兴天,高级工程师,主要研究方向:卫星结构设计,结构动力学与振动控制. E-mail: xtliu509@126.com

  • 中图分类号: O322

ANLYSIS OF THE DYNAMIC BEHAVIOR AND PERFORMANCE OF A VIBRATION ISOLATION SYSTEM WITH GEOMETRIC NONLINEAR FRICTION DAMPING

  • 摘要: 非线性隔振系统由于具有较线性系统更优的隔振性能,因此在工程中应用广泛.本文通过配置与被隔振对象的运动方向相垂直的库伦摩擦阻尼器,构建了几何非线性摩擦阻尼模型.由于引入了几何非线性,因此其摩擦力与位移正相关,这与传统与位移无关摩擦力模型有显著不同.首先,建立了具有几何非线性摩擦阻尼的数学模型以及隔振系统的受迫振动方程;然后,使用谐波平衡法求解了动力学方程,并使用数值仿真方法验证了谐波平衡法求解的准确性;最后,研究了几何非线性摩擦阻尼隔振器的绝对位移传递率和相对位移传递率.研究结果表明,在库伦摩擦阻尼选择适当,非线性摩擦阻尼系统可以在保持高频振动衰减效果的前提下,显著降低系统共振峰,其性能优于传统的恒定摩擦阻尼隔振模型.同时,几何非线性摩擦阻尼系统能够避免传统摩擦阻尼系统中的“锁定”现象,从传递率角度来说,不利于共振峰控制;但从激励环境改变引发隔振系统失效的角度来看,几何非线性摩擦阻尼系统可以拓宽系统对激励幅值的适应范围,避免隔振系统失效.本文的研究结果对此类隔振系统的设计和摩擦阻尼参数的选择具有通用的指导意义.

     

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出版历程
  • 收稿日期:  2018-09-10
  • 刊出日期:  2019-03-18

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