空气阻尼网孔式弹性垫减振单元理论模型研究

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振动与冲击 ›› 2022, Vol. 41 ›› Issue (23) : 94-101.

论文

和振兴，白彦博，包能能，贠剑峰，石广田

作者信息 +

Theoretical model of air damping mesh type elastic cushion vibration reduction element

HE Zhenxing, BAI Yanbo, BAO Nengneng, YUN Jianfeng, SHI Guangtian

Author information +

文章历史 +

摘要

弹性垫在减振和隔震领域应用广泛，为了提高弹性垫的阻尼，提出一种具有空气阻尼的网孔式弹性垫结构。利用材料的弹性差异，在网孔式弹性垫不同材质层内形成主气室和附气室，两个气室之间用节流孔联通。建立了空气阻尼网孔式弹性垫减振单元的理论模型，研究发现节流孔孔径、气室体积比是影响弹性垫刚度和阻尼的关键参数。有限元计算结果表明随着节流孔孔径的增大，弹性垫的动刚度随之增大，阻尼的变化趋势与刚度相反；减小气室体积比，弹性垫的动刚度会随之减小，而阻尼比会增大。节流孔孔径和气室体积比对弹性垫阻尼的影响比刚度明显，其中气室体积比对阻尼的影响最为显著。
关键词：空气阻尼；弹性垫；节流孔孔径；气室体积比；阻尼比

Abstract

Elastic cushions are widely used in the fields of vibration reduction and isolation. In order to improve the damping of the elastic cushions, a mesh type elastic cushion structure with air damping is proposed. Taking advantage of the difference in material elasticity, a main air chamber and an auxiliary air chamber are formed in different material layers of the mesh-type elastic cushion, and the two air chambers are connected by a throttle hole. The theoretical model of the air damping mesh elastic cushion vibration damping unit was established. The study found that the orifice aperture and the air chamber volume ratio are the key parameters affecting the stiffness and damping of the elastic cushion. The finite element calculation results show that as the aperture of the orifice increases, the dynamic stiffness of the elastic cushion increases, and the damping trend is opposite to the stiffness; reducing the air chamber volume ratio, the dynamic stiffness of the elastic cushion will decrease accordingly , And the damping ratio will increase. The orifice aperture and the air chamber volume ratio have a more obvious influence on the damping of the elastic cushion than the stiffness, and the air chamber volume ratio has the most significant influence on the damping.
Key words: Air damping; Elastic cushion; Orifice diameter; Air chamber volume ratio; Damping ratio

导出引用

和振兴，白彦博，包能能，贠剑峰，石广田. 空气阻尼网孔式弹性垫减振单元理论模型研究[J]. 振动与冲击, 2022, 41(23): 94-101

HE Zhenxing, BAI Yanbo, BAO Nengneng, YUN Jianfeng, SHI Guangtian. Theoretical model of air damping mesh type elastic cushion vibration reduction element[J]. Journal of Vibration and Shock, 2022, 41(23): 94-101

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