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

作　　者：孔令飞 李言 吕延军 李德信 李淑娟 汤奥斐 

机构地区：[1]School of Mechanical and Instrumental Engineering,Xi'an University of Technology [2]School of Mechanical and Instrumental Engineering,Xi’an University of Technology

出　　处：《Journal of Central South University》2009年第3期451-457,共7页中南大学学报（英文版）

基　　金：Project(2007CB707706) supported by the Major State Basic Research Development Program of China;Projects(2007E213,2007E203) supported by the Natural Science Foundation of Shaanxi Province,China

摘　　要：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.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.

关 键 词：copper stave deep hole drilling drilling shaft NONLINEARITY BIFURCATION 

分 类 号：P634[天文地球—地质矿产勘探]