在周期式热轧管机多参数在线测试的基础上分析了该轧管机主传动系统各轴段扭矩的变化,探讨了系统扭转刚度对系统动态响应的影响。对该轧管机进行了扭振固有模态分析;采用“状态空间一平均速度”的电算方法求解轧管机主传动系统的动态响应,结果与实测示波图取得了较好的一致,并得到了不同喂料速度,轧辊转速条件下扭矩最大值的变化曲线。用多维变量优化方法,对轧管机主传动系统各轴段刚度进行了优化计算,提出降低主传动系统扭矩动态响应峰值的可能方案。 Based on the multi-parameter on-line test of the periodic hot rolling mill, the change of torque of each section of the main driving system of the rolling mill was analyzed. The influence of the system torsional stiffness on the system dynamic response was also discussed. The torsional vibration mode analysis of the pipe mill was carried out. The dynamic response of the main drive system of the pipe mill was solved by the computer method of “state space-average speed”. The results were in good agreement with the measured oscillograms. The curves of torque maximum under different feeding speed and roll speed were obtained. The multi-dimensional variable optimization method is used to optimize the stiffness of each section of the main drive system of the pipe mill. The possible solutions to reduce the peak torque dynamic response of the main drive system are proposed.