Nonlinear vertical vibration control of rolling mill roll system based on negative stiffness vibration absorber

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Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (7) : 96-106.

VIBRATION THEORY AND INTERDISCIPLINARY RESEARCH

Nonlinear vertical vibration control of rolling mill roll system based on negative stiffness vibration absorber

DUAN Ziheng1,2, HE Dongping*1,2, XU Huidong1,2, WANG Tao1,2

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Abstract

The research of rolling mill vibration theory has always been a key scientific problem in the field of rolling forming, which is very important to improve the quality of plate and the stability of equipment. In order to reasonably control the nonlinear vertical vibration phenomenon of the rolling mill roll system, a negative stiffness vibration absorber installed at the upper balance beam is designed, and a nonlinear vertical vibration model of the rolling mill roll system with vibration absorber is established. The amplitude-frequency characteristic equation of the main resonance of the rolling mill roll system is obtained by using the multi-scale method. The influence of the dynamic changes of rolling force, negative stiffness and damping on the amplitude-frequency characteristics of the system is analyzed. The time domain characteristics, frequency spectrum characteristics, amplitude-frequency characteristics and power flow characteristics of the interaction between the roll and the negative stiffness absorber are analyzed by simulation. Based on the power flow theory and finite element simulation, the correctness of the model establishment and the feasibility of the negative stiffness absorber are proved. By comparison, it is found that the negative stiffness absorber has a good control effect on the nonlinear vertical vibration of the rolling mill, which provides theoretical guidance and technical support for the nonlinear dynamic analysis and stability control of the rolling mill.

Key words

rolling mill / negative stiffness vibration absorber / non-linear / multi-scale method / power flow

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DUAN Ziheng1, 2, HE Dongping1, 2, XU Huidong1, 2, WANG Tao1, 2. Nonlinear vertical vibration control of rolling mill roll system based on negative stiffness vibration absorber[J]. Journal of Vibration and Shock, 2025, 44(7): 96-106

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