Modelling and effect analysis of design parameters for orifice-type air damping systems

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (16) : 241-248.

CHEN Junjie1,2, YIN Zhihong2, GUO Konghui4, HE Jianghua3, ZENG Xiangkun5, YUAN Xianju6

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Abstract

Considering the bellow’s mechanical characteristics, the bellow model was achieved by adopting the fractional derivative Kelvin-Voigt model and smooth Coulomb friction model; and based on Newton’s mechanics, thermodynamics, fluid mechanics and viscoelastic mechanics, the nonlinear model of orifice type air damping system (OADS) was established.Near the working equilibrium point of OADS, the linear model of OADS was derived.Meanwhile, equivalent stiffness and equivalent damping coefficient equations were also derived by the equivalent complex stiffness method.Taking an air spring as the research object, we conducted this experiment to verify the OADS equivalent model’s effectiveness.Based on the above, the influence laws of excitation amplitude and excitation frequency, along with key design parameters for equivalent stiffness and equivalent damping coefficients of OADS were further analyzed and studied.The results provide valuable references for the design and match of stiffness and damping of air suspension.

Key words

Air spring / Throttling orifice / Equivalent stiffness / Equivalent damping coefficient / Design parameter

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CHEN Junjie1,2, YIN Zhihong2, GUO Konghui4, HE Jianghua3, ZENG Xiangkun5, YUAN Xianju6. Modelling and effect analysis of design parameters for orifice-type air damping systems[J]. Journal of Vibration and Shock, 2018, 37(16): 241-248

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