热带轧机的带钢表面与工作辊表面条纹痕迹缺陷与精轧机架的一种低频振动密切相关。通过对轧机牌坊系统的固有频率模态振型有限元的模态分析以及传动链的振源分析,证实了这种相关性。并进行了现场测试和相应的试验验证。现已采用经济可行的方法,即将主传动轴轮齿调整到使上下主轴轮齿齿槽不在一条直线上的安装方式。 The strip surface of the hot strip mill and the surface strip marks on the work roll are closely related to the low frequency vibration of the finishing stand. Through the modal analysis of natural frequency modal FE model of mill toroidal system and vibration source analysis of transmission chain, this correlation is confirmed. And conducted a field test and the corresponding test verification. It has been economically feasible to adjust the gear of the main drive shaft to such an arrangement that the tooth spaces of the upper and lower spindles do not lie on a straight line.