摘要
转子系统的运动稳定性是力学中的重要研究课题 ,它直接关系到汽轮机组运行的安全性与可靠性 .基于Muszynska转子动力学模型 ,采用短轴承理论 ,对转子非线性振动的稳定性进行了分析研究 .采用局部线性化方法 ,分析判断了转子涡动方程零解和自激振动极限环的稳定性 ,确定了转子运动的稳定性条件 .在极坐标系下首次给出了用 3个状态方程表示的转子系统运动的简捷方程 .主要分析了转速、流体润滑粘度和轴承的结构参数对转子运动稳定性的影响 .
This article presents the investigation into the stability of rotor system directly related to the safety and reliability of turbine sets. By using mathematical model of Muszynska's rotor with oil film and the theory of short bearings, the stability of rotor nonlinear vibration is studied. The zero solution of differential equation of the rotor whirl and the stability of limit cycle of self-excited vibration are analyzed with local linearized method, so the conditions for stable motion are obtained. Three state equations of rotor motion system proposed in terms of polar coordinates are deduced in order to study the effect of rotational speed, lubricant viscosity and bearing structure on the stability of motion of rotor system.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2001年第1期1-3,7,共4页
Journal of Harbin Institute of Technology
基金
国家自然科学基金重大项目! (19990 5 10 )
国家重点基础研究规划项目! (G19980 2 0 3 17)
哈尔滨工业大学跨学科交叉性研究基金资助
