Vertical-torsional coupled vibration characteristics of strip mill under additional dynamic bending moment of universal joint shaft

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (19) : 48-54.

HOU Dongxiao1, CHEN Shanping1, FANG Cheng1, SHI Peiming2, WANG Xingang1

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Abstract

Considering the effect of the Angle of universal joint on the additional dynamic bending moment, the vertical torsional coupling vibration model of the lower strip mill affected by the Angle of universal joint was established. The main common amplitude-frequency equation of the rolling mill coupling system is obtained by multi-scale method. The bifurcation characteristics of the coupled vibration system are analyzed by singularity theory, and the transition set of the system and the conditions of different bifurcation forms are obtained. Finally, the actual parameters of 1780 rolling mill were used to analyze the influences of joint Angle, rolling force parameters, joint torsional stiffness and external disturbance force on the main common amplitude and frequency characteristics of the vertical and torsional directions of the rolling mill, so as to provide theoretical reference for further suppressing the vibration of the rolling mill.
Key words: joint angle;Strip rolling mill; additional dynamic moment; vertical-torsional coupled; primary resonance

Key words

joint angle;Strip rolling mill / additional dynamic moment / vertical-torsional coupled / primary resonance

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HOU Dongxiao1, CHEN Shanping1, FANG Cheng1, SHI Peiming2, WANG Xingang1. Vertical-torsional coupled vibration characteristics of strip mill under additional dynamic bending moment of universal joint shaft[J]. Journal of Vibration and Shock, 2022, 41(19): 48-54

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