一种高固有频率的三向隔振系统动力学特性研究

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摘要结合机载环境下振源激励的多向性以及安装空间的局限性，提出一种高固有频率的紧凑型三向隔振系统。该系统包含4个旋转布置的隔振器组件，每个组件由2个相互正交、刚度解耦的隔振器组成。隔振器采用了高刚度设计提高承载能力,以避免隔振对象超出规定安装空间。为降低固有频率增大对指定高频段隔振效果的不利影响，设计了三参数流体阻尼隔振器，通过增大阶数的方式提升高频衰减速率，同时流体阻尼的高损耗因子可有效抑制高频隔振下的共振放大倍数。通过子结构频响综合法建立该系统的动力学模型，并进行了FEM验证。在理论建模与仿真的基础上进行隔振性能测试，实测三向共振频率近似相等，约115 Hz，共振放大系数<9 dB，400Hz处振动衰减量>10 dB，满足指定频带的传递率设计要求。
关键词：振动与波；被动隔振；子结构频响综合；三参数隔振器

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	黄子祥1
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	谢溪凌2
	张志谊2

关键词 ：振动与波, 被动隔振, 子结构频响综合, 三参数隔振器

Abstract：Considering the multi-direction of excitation source and limitation of mounting space in the airborne environment, a three-dimensional vibration isolation system with high natural frequency is proposed. The system consists of 4 isolation components that distribute Rotationally, and each isolation component is composed of 2 orthogonal vibration isolators. The isolator has a high stiffness to improve load capacity so that the out-of-space phenomenon could be avoided. To reduce the adverse impact of increasing natural frequency, a three-parameter fluid damping isolator was designed, which has a higher-order to provide a faster attenuation rate. Meanwhile, the fluid damping can provide a high loss factor to effectively suppress the resonance peak under high-frequency isolation. The dynamic model of the system was established by the Substructure Synthesis Method, and the FEM verification was carried out. Based on the modeling and simulation, the vibration isolation performance was measured. The resonance frequency was about 115 Hz and the resonance amplification <9 dB in each direction, vibration attenuation >10 dB at 400Hz, which meets the design requirements in the specified frequency band.
Key words: vibration and wave; passive vibration isolation; frequency response synthesis; three-parameter isolator

Key words： vibration and wave passive vibration isolation frequency response synthesis three-parameter isolator

收稿日期: 2021-06-22 出版日期: 2022-11-15

引用本文:

黄子祥1，2，谢溪凌2，张志谊2. 一种高固有频率的三向隔振系统动力学特性研究[J]. 振动与冲击, 2022, 41(21): 265-271.
HUANG Zixiang1,2, XIE Xiling2, ZHANG Zhiyi2. Dynamic characteristics of a 3-directional vibration isolation system with high natural frequency. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(21): 265-271.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2022/V41/I21/265

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