摘要
采用偏导数法求解动压气体润滑Reynolds方程,给出动压气体轴承动态刚度和动态阻尼系数普遍适应的计算方法。进行有限元数值仿真,计算动压气体轴承的动态刚度和动态阻尼系数,并重点研究轴颈扰动频率和不同轴颈扰动频率下的轴承静态载荷及轴承数对这些系数的影响。从理论上解释动压气体轴承的动态刚度和动态阻尼系数与轴颈扰动频率的密切相关性。
A novel and universal computational method for obtaining the dynamic stiffness and dynamic damping coefficients of aerodynamic bearings is presented by means of the partial derivative method applied to the gas-lubricated Reynolds equation. The dynamic stiffness and dynamic damping coefficients of a typical aerodynamic bearing are numerically computed by using the finite element method and special emphasis is placed on investigating the effects of the perturbation frequency of the journal, the static load applied on the bearing and the compressibility number on these coefficients. The numerical results are given in tabular and graphic forms and the direct dependency of the dynamic stiffness and dynamic damping coefficients of aerodynamic bearings on the perturbation frequency of the journal is explained theoretically.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2007年第5期91-98,共8页
Journal of Mechanical Engineering
基金
国家自然科学基金(50275116
50475088)
国家高技术研究发展计划(863计划
2002AA503020)资助项目
关键词
动压气体轴承
动态刚度系数
动态阻尼系数
偏导数法
轴颈扰动频率
Aerodynamic bearings
Dynamic stiffness coefficients
Dynamic damping coefficients
Partial derivative method
Perturbation frequency of the journal
