首页|弹性环结构参数对ERSFD动力系统特性的影响

弹性环结构参数对ERSFD动力系统特性的影响

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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.
Influence of elastic ring structural parameters on ERSFD dynamic system characteristics
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.

elastic ring squeeze film damperpowertrain characteristic parametersoil film force characteristicsfinite difference methodnonlinearityinternal and external connecting oil holes

秦源杰、刘宾宾、尹必峰、郝龙、赵庆军、赵巍

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江苏大学流体机械工程技术研究中心,江苏镇江 212000

中国科学院工程热物理研究所,北京 100190

江苏大学汽车与交通工程学院,江苏镇江 212000

中国科学院大学航空宇航学院,北京 100049

中国科学院工程热物理研究所分布式冷热电联供系统北京市重点实验室,北京 100190

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弹性环式挤压油膜阻尼器 动力系统特性参数 油膜力特性 有限差分法 非线性 连接孔

国家科技重大专项国家自然科学基金

J2019-Ⅱ-0011-003111902319

2024

10.13224/j.cnki.jasp.20220616

航空动力学报
中国航空学会

航空动力学报

CSTPCD北大核心
影响因子：0.59
ISSN：1000-8055
年,卷(期)：2024.39(8)