A kind of automatic radiation fin molding machine with material detection device is studied.The simplified mechanical model of the 2-DOF impact vibration molding machine containing gap and friction is established,and the kinematic equation of the system is established according to the Lagrange equation.The detailed process of the system motion and the judgment conditions of each stage are obtained.The transition process of system motion,the phenomena of viscosity and flutter under improved LuGre dynamic friction are analyzed by numerical simulation.The results show that the system motion mainly shifts between single periodic motion and multi periodic motion and between periodic motion and chaos through period doubling bifurcation,period inverse doubling bifurcation,grazing bifurcation and Hopf bifurcation.In addition,when the system excitation frequency is between 1 and 1.081 9,the system motion has viscous and flutter phenomena;when the system excitation frequency is between 1.081 9 and 3,the system motion only has flutter phenomenon,and the viscous phenomenon disappears.
关键词
振动与波/成型机/动摩擦/分岔/黏滞/动力学特性
Key words
vibration and wave/forming machine/dynamic friction/bifurcation/viscous/dynamic properties
维普
万方数据