摘要
建立了柔性转子轴承系统的有限元模型,在考虑油膜支撑非线性因素的基础上,增加了材料阻尼、陀螺效应、惯量分布和剪切效应等更为具体化的影响因素。采用数值积分法分别对质点模型和有限元模型进行求解,分别用分叉图、三维谱图分析了两者的全局及局部响应。结果表明,两类模型的非线性特性有着显著差别,同时说明用有限元模型来研究转子系统的非线性特性可以得到更为精确的结果,为复杂转子系统的理论研究和深层次非线性动态设计提供依据和参考。
The nonlinear dynamic behavior element model based on the analysis of particle of a rotor-bearing system was analyzed with its finite model, with considering some other important influence factors such as, material damping, gyroscopic effect, inertia distribution, shear effect and so on, which made the description of the system more embodiment avoiding the casualness of selection with system parameters. With the comparison of the results on the bifurcation map and three- dimensional spectrum, significant difference is appeared with the addition of the considered factors. It is suggested that the substitution of continuum model for the discrete ones can get more accurate and abundant results. Furthermore, these results can provide more accurate verification and reference for the experiment and nonlinear dynamic design of the complex rotor system.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2009年第2期218-222,共5页
China Mechanical Engineering
基金
国家自然科学基金资助重点项目(5053010)
关键词
转子轴承系统
非线性特性
质点模型
有限元模型
分岔
rotor-bearing system
nonlinear characteristics
practicle model
finite element model
bifurcation
