In order to investigate the forced transverse vibration of rolls under distributed draught pressure and moment of bending roll force,the forced transverse vibration model of rolls for four-high rolling mill was establ...In order to investigate the forced transverse vibration of rolls under distributed draught pressure and moment of bending roll force,the forced transverse vibration model of rolls for four-high rolling mill was established. The work roll and backup roll were considered as elastic continuous bodies that were joined by a Winkler elastic layer. According to Euler-Bernoulli beam theory,the forced transverse vibration of rolls was analyzed based on modal superposition method. The forced vibration equations were established when the draught pressure and moment of bending roll force were imposed on the rolls respectively. Numerical modeling was made on 2 030 mm cold tandem rolling mill of Baoshan Iron and Steel Company. Simulation results show that when the work roll is only subjected to different forms of draught pressures,the vibration curves of work roll and backup roll are quadratic curves with amplitudes of 0.3 mm and 45 μm,respectively. When only the moments of bending roll force are imposed on the work roll and backup roll,the vibration curves of work roll and backup roll are quadratic curves,and the amplitudes are 5.0 and 1.6 μm,respectively. The influence of moment of bending roll force on the vibration of work roll is related with the bending roll force.展开更多
基金Project(50875231) supported by the National Natural Science Foundation of ChinaProject(E2006001038) supported by Great Natural Science Foundation of Hebei Province, China
文摘In order to investigate the forced transverse vibration of rolls under distributed draught pressure and moment of bending roll force,the forced transverse vibration model of rolls for four-high rolling mill was established. The work roll and backup roll were considered as elastic continuous bodies that were joined by a Winkler elastic layer. According to Euler-Bernoulli beam theory,the forced transverse vibration of rolls was analyzed based on modal superposition method. The forced vibration equations were established when the draught pressure and moment of bending roll force were imposed on the rolls respectively. Numerical modeling was made on 2 030 mm cold tandem rolling mill of Baoshan Iron and Steel Company. Simulation results show that when the work roll is only subjected to different forms of draught pressures,the vibration curves of work roll and backup roll are quadratic curves with amplitudes of 0.3 mm and 45 μm,respectively. When only the moments of bending roll force are imposed on the work roll and backup roll,the vibration curves of work roll and backup roll are quadratic curves,and the amplitudes are 5.0 and 1.6 μm,respectively. The influence of moment of bending roll force on the vibration of work roll is related with the bending roll force.
