Dynamic Characteristics Analysis of the Sealed Ends Squeeze Film Damper with O-ring

doi:10.3901/JME.2025.08.352

Abstract

Abstract: In order to study the dynamic characteristics of sealed ends squeeze film damper(SFD) with O-ring under the influence of inertial force, the dynamic characteristic coefficients of sealed ends SFD are derived from energy approximation method under long bearing approximation(LBA) and semi-oil film assumptions. A three-dimensional computational fluid dynamics model of sealed ends SFD is established, and numerical simulation is carried out based on the transient time step solution method and dynamic grid technology. Both theoretical calculation and numerical simulation are conducted to analyze the effects of whirling frequency on the stiffness and damping. The theoretical and simulation results correspond with each other precisely. Besides，the numerical simulation considering two-phase flow effect which shows that the fluid inertia and damping increase with frequency is verified by the experiment based on the two-way excitation test of the sealed ends SFD with O-ring. This study will provide a reference for the design and application of sealed ends SFD with O-ring.

Key words: squeeze film damper, O-ring, fluid inertia, dynamic characteristics, two phase flow

CLC Number:

TG156

ZHOU Hailun, CANG Yangguang, ZHANG Yuqi, CAO Gangyi. Dynamic Characteristics Analysis of the Sealed Ends Squeeze Film Damper with O-ring[J]. Journal of Mechanical Engineering, 2025, 61(8): 352-361.

References

[1] SAN ANDRES L，RODRIGUEZ B. On the experimental dynamic force performance of a squeeze film damper supplied through a check valve and sealed with O-rings[J]. Journal of Engineering for Gas Turbines and Power，2021，143(11)：1-24.
[2] SAN ANDRES L，KOO B，JEUNG S H. Experimental force coefficients for two sealed ends squeeze film dampers (piston rings and O-rings)：An assessment of their similarities and differences[J]. Journal of Engineering for Gas Turbines and Power，2019，141(2)：1-13.
[3] El-SHAFEI A. Unbalance response of a jeffcott rotor incorporating long squeeze film dampers[J]. Journal of Engineering for Gas Turbines and Power，1991，113(1)：85-94.
[4] SAN ANDRES L，SESHAGIRI S. Damping and Inertia coefficients for two end sealed squeeze film dampers With a central groove：Measurements and predictions[J]. Journal of Engineering for Gas Turbines and Power，2013，135(11)：1-9.
[5] DOUSTI S，KAPLAN J A，HE F，et al. Elastomer O-rings as centering spring in squeeze film dampers：Application to turbochargers[C]//Turbo Expo：Power for Land，Sea，and Air. American Society of Mechanical Engineers，2013，55270：V07BT30A018.
[6] SZERI A Z. Fluid film lubrication[M]. Cambridge：Cambridge University Press，2010.
[7] 闻邦椿，顾家柳，夏松波，等. 高等转子动力学[M]. 北京：机械工业出版社，2000. WEN Bangchun，GU Jialiu，XIA Songbo，et al. Advanced rotor dynamics[M]. Beijing：China Machine Press，2000.
[8] SZERI A Z，GIRON-DUARTE A，RAIMONDI A A. Linear force coefficients for squeeze film dampers[J]. Am. Soc. Mech. Eng.，1982，105(3)：326-334.
[9] El-SHAFEI A. Modeling fluid inertia forces of short journal bearings for rotordynamic applications[J]. Transactions of the ASME，1995，117：462-469.
[10] El-SHAFEI A. Unbalance response of a jeffcott rotor incorporating short squeeze film dampers[J]. Journal of Engineering for Gas Turbines and Power，1990，112(4)： 445-453.
[11] 王晓娟，韩知非，丁千，等. 流体惯性对弹性环式挤压油膜阻尼器-转子系统动力特性的影响[J]. 航空动力学报，2018，33(12)：2981-2990. WANG Xiaojuan，HAN Zhifei，DING Qian，et al. Influence of fluid inertia on dynamic characteristics of elastic ring squeeze film damper-rotor system[J]. Journal of Aerospace Power，2018，33(12)：2981-2990.
[12] GUO Z，HIRANO T，KIRK R G. Application of CFD analysis for rotating machinery–Part I：Hydrodynamic，hydrostatic bearings and squeeze film damper[J]. Journal of Engineering for Gas Turbines and Power，2005，127(2)：445-451.
[13] 周海仑，张晨帅，艾延廷，等. 弹性环式挤压油膜阻尼器的流固耦合建模及动力特性分析[J]. 机械工程学报，2020，56(20)：195-205. ZHOU Hailun，ZHANG Chenshuai，AI Yanting，et al. Study on dynamic characteristics and modeling of elastic ring squeeze film damper based on fluid-structure interaction[J]. Journal of Mechanical Engineering，2020，56(20)：195-205.
[14] LEE G J，KIM J，STEEN T. Application of computational fluid dynamics simulation to squeeze film damper analysis[J]. Journal of Engineering for Gas Turbines and Power，2017，139(10)：1-11.
[15] DOUSTI S，GERAMI A，DOUSTI M. A numerical CFD analysis on supply groove effects in high pressure，open end squeeze film dampers[J]. International Journal of Engineering Innovation and Research，2016，5(1)： 80-89.
[16] ZHOU Hailun，CHEN Xi，ZHANG Chenshuai. Numerical simulation and influence factors analysis for dynamic characteristics of squeeze film damper[J]. Journal of Vibro-Engineering，2020，22(7)：1593-1605.
[17] ZHOU Hailun，CHEN Xi，ZHANG Yuqi，et al. An analysis on the influence of air ingestion on vibration damping properties of squeeze film dampers[J]. Tribology International，2020，145(2020)：1-10.
[18] FAN T S，HAMZEHLOUIA S，BEHDINAN K. The effect of lubricant inertia on fluid cavitation for high- speed squeeze film dampers[J]. Journal of Vibro- Engineering，2017，19(8)：6122-6134.
[19] GHELLER E. Squeeze film damper modeling and application[D]. Milan：Polytechnic University of Milan，2021.
[20] CRANDALL S H，El-SHAFEI A. Momentum and energy approximations for elementary squeeze-film damper flows[J]. Journal of Applied Mechanics，1993，60(3)：728-736.
[21] BOOKER J F. A table of the journal-bearing integral[J]. Journal of Basic Engineering，1965，87(2)：533-535.
[22] ADILETTA G. An insight into the dynamics of a rigid rotor on two-lobe wave squeeze film damper[J]. Tribology International，2017，116(2017)：69-83.
[23] 周海仑，冯国全，张明，等. 挤压油膜阻尼器油膜阻尼系数识别及分析[J]. 中国机械工程，2016，27(15)：2015-2020. ZHOU Hailun，FENG Guoquan，ZHANG Ming，et al. Dampering coefficent identification and analysis for squeeze film dampers [J]. China Mechanical Engineering，2016，27(15)：2015-2020.
[24] 周海仑，张明，成晓鸣，等. 供油条件对挤压油膜阻尼器等效阻及周向位置阻尼的影响[J]. 机械工程学报，2018，54(6)：215-223. ZHOU Hailun，ZHANG Ming，CHENG Xiaoming，et al. Effects of oil supply conditions on equivalent damping and circumferential position damping of squeeze film damper[J]. Journal of Mechanical Engineering，2018，54(6)：215-223.
[25] DIAZ S E，SAN ANDRES L. Reduction of the dynamic load capacity in a squeeze film damper operating with a bubbly lubricant[J]. Journal of Engineering for Gas Turbines & Power，1999，121(4)：703-709.
[26] TAO L Y，DIAZ S E，SAN ANDRES L，et al. Analysis of squeeze film dampers operating with bubbly lubricants[J]. Journal of Tribology，2000，122(1)：205-210.