中厚板轧机非线性参激的振动

建立了中厚板轧机两自由度非线性参激振动模型,分析了轧机振动系统在主参数共振情形下的振动特性,尤其是振动系统随激励参数变化的拟周期振动和混沌运动现象。分析结果表明:轧制过程中轧制力的周期性变化可以导致轧机振动系统混沌运动的产生;避免激振力频率与系统固有频率相近,以防止混沌的出现。

Parametrically excited nonlinear vibrations of medium and heavy plate milling

A nonlinear parametrical excited vibration model with two degrees of freedom for medium and heavy plate milling system was established.The milling system vibration features when the rolling vibration system was in resonance vibration with the main parameters were analyzed,especially the quasi-periodic and chaotic vibrations of the vibration system with excitation parameters.The results indicate that in the periodical rolling process,variable rolling forces would result in chaotic vibrations and that the frequency of exciting force near the natural frequency of the vibration system should be avoided to eliminate chaos.