Stability and nonlinear dynamic behavior of drilling shaft system incopper stave deep hole drilling

来源期刊：中南大学学报(英文版)2009年第3期

论文作者：孔令飞 李言 吕延军 李德信 李淑娟 汤奥斐

文章页码：451 - 457

Key words：copper stave; deep hole drilling; drilling shaft; nonlinearity; bifurcation

Abstract: The stability and nonlinear dynamic behavior of drilling shaft system in copper stave deep hole drilling were analyzed. The effects of the fluctuation of the cutting force, the mass eccentricity and the hydrodynamic forces of cutting fluid could be taken into consideration in the model of drilling shaft system. Based on the isoparametric finite element method, the variational form of Reynolds equation in hydrodynamic fluid was used to calculate nonlinear hydrodynamic forces and their Jacobian matrices simultaneously. In the stability analysis, a new shooting method for rapidly determining the periodic orbit of the nonlinear drilling shaft system and its period was presented by rebuilding the traditional shooting method and changing the time scale. Through the combination of theories with experiment, the correctness and effectiveness of the above methods are verified by using the Floquet theory. The results show that the mass eccentricity can inhibit the whirling motion of drilling shaft to some extent.

基金信息：the Major State Basic Research Development Program of China
the Natural Science Foundation of Shaanxi Province, China