Nonlinear Dynamic Analysis of Rolling Bearing-Rotor System

本文以六自由度滚动轴承–转子系统为研究对象，基于国家发展需求及我国在数控机床领域的现状，深入探讨其相关特性。构建了系统的非线性动力学模型并作基本假设，通过数值仿真分析不同参数对系统振动特性的影响，包括转速、偏心距、轴承游隙等。全面研究了基准模型的分岔特性，以及不同轴承游隙和偏心距下系统的运动状态变化。研究结果为该系统的设计与运行提供了理论依据，有助于提升系统的安全性、高效性与稳定性，对改善数控机床品质具有重要意义。In this paper, the six-degree-of-freedom rolling bearing-rotor system is taken as the research object. In view of the national development requirements and the current situation of China in the field of CNC machine tools, its related characteristics are deeply explored. The nonlinear dynamic model of the system is constructed and basic assumptions are made. Through numerical simulation, the influence of different parameters on the vibration characteristics of the system is analyzed, including rotational speed, eccentricity, bearing clearance, etc. The bifurcation characteristics of the benchmark model and the change in the motion state of the system under different bearing clearances and eccentricities are comprehensively studied. The research results provide a theoretical basis for the design and operation of this system, which is helpful in improving the safety, high efficiency, and stability of the system and is of great significance for improving the quality of CNC machine tools.