摘要
在同时考虑轴承油膜力和碰摩发生时转静件间的相对速度对非线性摩擦力的影响基础上,构造了双跨碰摩弹性转子-轴承系统动力学模型。对系统单盘和双盘碰摩的非线性动力学响应进行了数值仿真研究,发现该类系统在单盘碰摩时进入混沌的道路是倍周期分岔,离开混沌的道路为倍周期倒分岔,混沌运动区域为一体;双盘同时碰摩时,混沌运动区域中出现了2个明显的独立混沌岛。偏心量的增大,会使得系统响应更加不稳定。研究结果为转子-轴承系统故障诊断、动态设计和安全运行提供了理论参考。
A dynamic model of the rotor-bearing system was established considering the oil film force and the nonlinear friction force. The nonlinear dynamics behaviors induced by rub-impact of one disk or two discs were numerically studied. The route to chaotic motion of the system with rub-impact fault of one disc is by periodicdoubling bifurcation, and the route of leaving is by periodic-doubling reverse bifurcation. There are two self-existent islands in the regions of chaotic motion when rub-impact of two discs happens. The response becomes more instable with the increase of eccentricity. The results can be used in fault diagnoses, dynamic design, and security running of a rotor-bearing system.
出处
《机械科学与技术》
CSCD
北大核心
2008年第11期1271-1274,共4页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金重点项目(50535010)
国家自然科学基金项目(50775025)资助
关键词
转子-轴承系统
碰摩
非线性响应
分岔
混沌
rotor-bearing system
rub-impact
nonlinear response
bifurcation
chaos
