高速旋转圆盘刀具薄刀片横向振动的有限元分析

针对高速旋转圆盘刀具薄刀片实际工作时存在的横向振动问题,应用有限元方法及实验测量进行了研究。利用单元正方化扇形网格划分方法,对薄刀片划分单元,并应用拉格朗日方程建立了高速旋转圆盘薄片刀具薄刀片的动力学方程。通过对该动力学方程的分析,确定了薄片圆盘刀具系统的静态和动态特性。利用专门设计、制造的试验装置,对圆盘薄片刀具系统的静态和动态特性进行了测量,并将测量数据与理论分析进行了对比。结果表明:建立的薄片圆盘刀具系统的动力学方程是正确的。

Finite element analysis of lateral vibration of high-speed rotating disk cutter slice blade

The lateral vibration of the high-speed rotating disk cutter slice blade was studied by the finite element analysis and the experimental measurement. The fan-shaped grid with the element squarization was used to mesh the slice blade, and a dynamic equation was established for the slice blade according to Lagrange equation. The static and dyanmic behaviors of the blade system were determined by the established dynamic equation. A special experiment set-up was developed and used to measure the behaviors of the blade system. The measured data were compared with the theoretical analysis, and the results show that the dynamic equation established for the high-speed rotating disk cutter slice blade system is correct.