THE ANALYSIS ON PARAMETRICALLY EXITEMENT NONLINEAR VERTICAL VIBRATION OF ROLLER SYSTEM IN ROLLING MILLS
Hou Dongxiao;Chen Hao;Liu Bin;Shi Peiming
Journal of Vibration and Shock ›› 2009, Vol. 28 ›› Issue (11) : 1-5.
THE ANALYSIS ON PARAMETRICALLY EXITEMENT NONLINEAR VERTICAL VIBRATION OF ROLLER SYSTEM IN ROLLING MILLS
Abstract: A vertical nonlinear parametrically exited vibration model of 4-h rolling system is established, which considered the nonlinear damping and nonlinear stiffness between working rolls, The parse approximation solution under main frequency, ultra harmonics and inferior harmonics parametric resonance are carried out by using multiple-scales method, and the curve equations of amplitude-frequency are obtained. The stability characteristic is discussed and the effect relationship between stability and each parameter are obtained. The vibrational characteristic of system under nonlinear stiffness and nonlinear damping are analyzed. With the change of nonlinear stiffness, the amplitude appears the jumping phenomenon. It leads instability of the system. The numerical simulation indicated that the solution is validated. It could offer some theory guidance on controlling vibration in rolling mills.
rolling mill / parametrically exited vibration {{custom_keyword}} /
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