摘要
为研究弹性环式挤压油膜阻尼器(ERSFD)的油膜力特性,分析ERSFD动力系统特性参数,基于弹性环径向变形,建立ERSFD内、外层油膜压力的微分计算模型,利用有限差分法对微分计算模型进行求解,通过数值模拟研究弹性环凸台高度、数量、宽度、弹性环内外连接孔对该型ERSFD油膜力特性的影响。结果表明:相对于传统挤压油膜阻尼器,弹性环径向变形改变内、外油膜间隙,有利于抑制油膜刚度随偏心率高度非线性变化。ERSFD中弹性环凸台调节了阻尼器内、外油膜压力分布形态,凸台的存在减小了挤压油膜区域,使ERSFD内、外油膜刚度和阻尼均减小。弹性环内外连接孔使内油膜刚度减小,外油膜刚度增大。
In order to study oil film force characteristics of the elastic ring squeeze film damper(ERSFD) and analyze the characteristic parameters of the dynamic system of ERSFD,based on the radial deformation of the elastic ring,the differential calculation model of the inner and outer oil film pressure of the ERSFD was established.The differential calculation model was solved by using the finite difference method.The influence of the height,number,width of the elastic ring boss,and the inner and outer connecting holes of the elastic ring on the oil film force characteristics of ERSFD was studied through numerical simulation.The results showed that compared with the traditional squeeze film damper,the radial deformation of the elastic ring changed the internal and external oil film clearances,helping to restrain the nonlinear change of the oil film stiffness with the height of eccentricity.The elastic ring boss in ERSFD regulated the distribution pattern of the internal and external oil film pressure of the damper.The existence of the boss reduced the squeeze oil film area,reducing the stiffness and damping of the internal and external oil films of ERSFD.The oil holes connected inside and outside the elastic ring reduced the stiffness of the inner oil film and increased the stiffness of the outer oil film.
作者
秦源杰
刘宾宾
尹必峰
郝龙
赵庆军
赵巍
QIN Yuanjie;LIU Binbin;YIN Bifeng;HAO Long;ZHAO Qingjun;ZHAO Wei(Research Center of Fluid Machinery Engineering and Technology,Jiangsu University,Zhenjiang Jiangsu 212000,China;Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China;School of Automotive and Traffic Engineering,Jiangsu University,Zhenjiang Jiangsu 212000,China;School of Aeronautics and Astronautics,University of Chinese Academy of Sciences,Beijing 100049,China;Beijing Key Laboratory of Distributed Combined Cooling Heating and Power System,Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China)
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2024年第8期283-292,共10页
Journal of Aerospace Power
基金
国家科技重大专项(J2019-Ⅱ-0011-0031)
国家自然科学基金(11902319)。
