不同油膜力模型下转子椭圆轴承系统的动力学分析  

A Dynamic Analysis of a Rotor-Elliptic bearing System Using Different Oil-film Force Models

作　　者：焦映厚[1] 陈照波[1] 李明章[1] 

机构地区：[1]哈尔滨工业大学机电学院,黑龙江哈尔滨150001

出　　处：《热能动力工程》2006年第4期418-422,共5页Journal of Engineering for Thermal Energy and Power

基　　金：黑龙江省自然科学重点基金资助项目(ZJG03-1);黑龙江省博士后启动基金资助项目(LRB00012);哈尔滨市后备带头人基金资助项目(2004AFXXJ011)

摘　　要：对现有几种椭圆轴承非线性油膜力模型与直接采用有限差分数值法求解雷诺方程得出的非线性油膜力进行了分析和比较,同时对在不同椭圆轴承非线性油膜力模型下,实际转子-椭圆轴承系统响应的相对误差、计算速度和动力学特性进行了分析和比较。在综合考虑其计算精度、计算速度和动力学特性的情况下,研究结果表明:数据库方法应为优先推荐采用油膜力模型,其次为数据库拟合表达式方法和变分法模型。研究结果为在实际旋转机械转子-椭圆轴承系统进行非线性动力学分析和设计时,选择油膜力模型提供了依据。The nonlinear oil-film force obtained by using several kinds of elliptic-bearing nonlinear oil-film models currently available is analyzed and compared with that derived by directly using a finite-difference numerical method for solving a Reynold equation.Meanwhile,the relative errors,calculation speed and dynamic characteristics of the response of an actual rotor-elliptic bearing system obtained under different elliptic-bearing non-linear oil-film force models have also been analyzed and compared.With the calculation accuracy,computation speed and dynamic characteristics of the above system being taken into account in a comprehensive way,research results show that a database method should be an oil-film force model to be recommended as a first priority,followed by a database fitting-expression and variation method model as a second choice.The foregoing provides a basis for the selection of oil-film force model during the nonlinear dynamic analysis and design of an actual rotating mechanical rotor-elliptic bearing system.

关 键 词：非线性油膜力 椭圆轴承 转子系统 

分 类 号：O322[理学—一般力学与力学基础] TH133[理学—力学]