Modern rotor systems with gas-lubricated bearings typically operate above the first critical speed, requiring low damping for efficiency above resonance and high damping for vibration suppression at critical speed. Traditional hermetic squeeze film dampers (HSFDs) for gas bearings suffer from exhibit frequency-dependent damping degradation at high frequencies. To address this limitation, a squeeze-mode magnetorheological (MR) fluid damper is proposed, enabling real-time dynamic damping adjustment via magnetic field control. Three-dimensional finite element analysis (FEA) characterized magnetic field distributions under varying currents, while a theoretical model incorporating viscous-inertial-MR effects was developed. Multi-parameter excitation experiments validated that coil energization achieves 2.46-fold damping regulation at 120 Hz excitations, increasing damping from 2.95 kN·s/m (de-energized) to 7.26 kN·s/m (energized). Analytically derived expressions established a linear current-frequency relationship for maintaining constant damping across the 20–200 Hz frequency range. The proposed MR damper resolves the conflicting damping demands in high-speed rotor systems, demonstrating superior broadband adaptability compared to conventional HSFDs.
ErtasBGaryK.Frequency dependency of dynamic force coefficients for hermetic squeeze film dampers utilizing fluid-bounding flexible structures. J Sound Vib2023; 551: 117612.
2.
ErtasBDelgadoA.Hermetically sealed squeeze film damper for operation in oil-free environments. J Eng Gas Turbine Power2019; 141(2): 022503.
3.
KimKJLeeCWKooJH.Design and modeling of semi-active squeeze film dampers using magneto-rheological fluids. Smart Mater Struct2008; 17(3): 035006.
4.
Domínguez-GonzálezAStiharuISedaghatiR.Practical hysteresis model for magneto-rheological dampers. J Intell Mater Syst Struct2014; 25: 967–979.
5.
AgrawalGL.Foil air/gas bearing technology—an overview. Turbo Expo: Power for Land, Sea, and Air1997; 78682: V001T04A006.
6.
FengKZhaoXHuoC, et al. Analysis of novel hybrid bump-metal mesh foil bearings. Tribol Int2016; 103: 529–539.
7.
De SantiagoOSolórzanoV. Experiments with scaled foil bearings in a test compressor rotor. In: Turbo Expo: Power for Land, Sea, and Air, 2013, 55263: V07AT29A002. American Society of Mechanical Engineers.
8.
San AndresLAbraham ChirathadamT. A metal mesh foil bearing and a bump-type foil bearing: comparison of performance for two similar size gas bearings. J Eng Gas Turbine Power2012; 134(10): 102501.
9.
MorosiSSantosIF. Experimental investigations of active air bearings. In: Turbo Expo: Power for Land, Sea, and Air, 2012, 44731, pp.901–910. American Society of Mechanical Engineers.
10.
SimKKimD.Design of flexure pivot tilting pads gas bearings for high-speed oil-free microturbomachinery. J Tribol2007; 129(1): 112–119.
11.
RyuKAshtonZ.Bump-type foil bearings and flexure pivot tilting pad bearings for oil-free automotive turbochargers: highlights in rotordynamic performance. J Eng Gas Turbine Power2016; 138(4): 042501.
12.
LihuaYShemiaoQLieY.Analysis on dynamic performance of hydrodynamic tilting-pad gas bearings using partial derivative method. J Tribol2009; 131: 011703–011711.
13.
BolenR.Measurements of the static and dynamic load performance of a carbon-graphite porous surface tilting-pad gas lubricated journal bearing. Texas A&M University, 2020.
14.
San AndrésLYangJMcGowanR. Measurements of static and dynamic load performance of a 102 MM carbon-graphite porous surface tilting-pad gas journal bearing. J Eng Gas Turbine Power2021; 143(11): 111017.
15.
WuYAnLFengK, et al. Experimental and theoretical investigation on rotodynamic characterization of hybrid porous tilting pad bearings. Mech Syst Signal Process2022; 164: 108245.
16.
ErtasBH.Compliant hybrid journal bearings using integral wire mesh dampers. J Eng Gas Turbine Power2009; 131(2): 022503.
17.
FengKWuYLiuW, et al. Theoretical investigation on porous tilting pad bearings considering tilting pad motion and porous material restriction. Precis Eng2018; 53: 26–37.
18.
WaumansTPeirsJAl-BenderF, et al. Aerodynamic journal bearing with a flexible, damped support operating at 7.2 million DN. J Micromech Microeng2011; 21(10): 104014.
19.
DiazSSan Andre’sL.A model for squeeze film dampers operating with air entrainment and validation with experiments. J Tribol2001; 123(1): 125–133.
20.
ErtasBDelgadoA.Compliant hybrid gas bearing using modular hermetically sealed squeeze film dampers. J Eng Gas Turbine Power2019; 141(2): 022504.
21.
ErtasBGaryKAdcockT.Identification of dynamic force coefficients for an additively manufactured hermetic squeeze film bearing support damper utilizing a pass-through channel. J Eng Gas Turbine Power2024; 146(6): 061008.
22.
MazlanSAEkreemNBOlabiAG.The performance of magnetorheological fluid in squeeze mode. Smart Mater Struct2007; 16(5): 1678–1682.
23.
ChoiSBLiWYuM, et al. State of the art of control schemes for smart systems featuring magneto-rheological materials. Smart Mater Struct2016; 25(4): 043001.
24.
LiPYanMPanZ, et al. Performance evaluation of a novel squeeze mode magnetorheological fluid damper with pre-compression mechanism under small amplitude and medium-high frequency. J Intell Mater Syst Struct2023; 34(15): 1792–1808.
25.
YuJDongXSuX, et al. Development and characterization of a novel rotary magnetorheological fluid damper with variable damping and stiffness. Mech Syst Signal Process2022; 165: 108320.
26.
SohnJWOhJSChoiSB.Design and novel type of a magnetorheological damper featuring piston bypass hole. Smart Mater Struct2015; 24(3): 035013.
27.
SunSYangJLiW, et al. Development of a novel variable stiffness and damping magnetorheological fluid damper. Smart Mater Struct2015; 24(8): 085021.
28.
RuanXXuanSZhaoJ, et al. Mechanical performance of a novel magnetorheological fluid damper based on squeeze-valve bi-mode of MRF. Smart Mater Struct2020; 29(5): 055018.
29.
HanYMChoiSB.Control of a haptic gear shifting assistance device utilizing a magnetorheological clutch. Smart Mater Struct2014; 23(10): 105029.
30.
SongWLLiDHTaoY, et al. Simulation and experimentation of a magnetorheological brake with adjustable gap. J Intell Mater Syst Struct2017; 28(12): 1614–1626.
31.
PatelSRPatelDMUpadhyayRV.Performance enhancement of MR brake using flake-shaped iron-particle–based magnetorheological fluid. J Test Eval2020; 48(3): 2393–2411.
32.
HuGYangXWuL, et al. Braking performance and temperature characteristics analysis of parallel multi-channel magnetorheological brake. Int J Appl Electromagn Mech2023; 72(4): 433–459.
33.
PrabakarRSSujathaCNarayananS.Response of a quarter car model with optimal magnetorheological damper parameters. J Sound Vib2013; 332(9): 2191–2206.
34.
RajaPWangXGordaninejadF.A high-force controllable MR fluid damper–liquid spring suspension system. Smart Mater Struct2014; 23(1): 015021.
35.
NguyenSDChoiSBNguyenQH.A new fuzzy-disturbance observer-enhanced sliding controller for vibration control of a train-car suspension with magneto-rheological dampers. Mech Syst Signal Process2018; 105: 447–466.
36.
MengFZhouJJinC, et al. Modeling and experimental verification of a squeeze mode magnetorheological damper using a novel hysteresis model. Proc Inst Mech Eng C J Mech Eng Sci2019; 233(15): 5253–5263.
37.
YazidIIMMazlanSAKikuchiT, et al. Design of magnetorheological damper with a combination of shear and squeeze modes. Mater Des2014; 54: 87–95.
LiZZhangXGuoK, et al. A novel squeeze mode based magnetorheological valve: design, test and evaluation. Smart Mater Struct2016; 25(12): 127003.
40.
WangDHLiaoWH.Magnetorheological fluid dampers: a review of parametric modelling. Smart Mater Struct2011; 20(2): 023001.
41.
WereleyNMPangLKamathGM.Idealized hysteresis modeling of electrorheological and magnetorheological dampers. J Intell Mater Syst Struct1998; 9(8): 642–649.
42.
SpencerBFDykeSJSainMK, et al. Phenomenological model for magnetorheological dampers. J Eng Mech1997; 123(3): 230–238.
43.
WangXGordaninejadF.Flow analysis of field-controllable, electro- and Magneto-rheological fluids using Herschel-Bulkley model. J Intell Mater Syst Struct1999; 10(8): 601–608.
44.
ChoiYTChoJUChoiSB, et al. Constitutive models of electrorheological and magnetorheological fluids using viscometers. Smart Mater Struct2005; 14(5): 1025–1036.
45.
KwokNMHaQPNguyenTH, et al. A novel hysteretic model for magnetorheological fluid dampers and parameter identification using particle swarm optimization. Sens Actuators A Phys2006; 132(2): 441–451.
46.
ChenPBaiXXQianLJ, et al. A new hysteresis model based on force–displacement characteristics of magnetorheological fluid actuators subjected to squeeze mode operation. Smart Mater Struct2017; 26(6): 06LT01.
47.
WangFYingZXWangLX.Simulation on hysteresis characteristic of squeeze mode magneto-rheological damper based on non-convex constitutive relation. Korea-Australia Rheol J2021; 33(3): 261–271.
48.
ZongLHGongXLGuoCY, et al. Inverse neuro-fuzzy MR damper model and its application in vibration control of vehicle suspension system. Veh Syst Dyn2012; 50(7): 1025–1041.
49.
LiSWattersonPALiY, et al. Improved magnetic circuit analysis of a laminated magnetorheological elastomer device featuring both permanent magnets and electromagnets. Smart Mater Struct2020; 29(8): 085054.
50.
ChenPBaiXXQianLJ.Magnetorheological fluid behavior in high-frequency oscillatory squeeze mode: experimental tests and modelling. J Appl Phys2016; 119(10): 105101.
51.
FarjoudACaveyRAhmadianM, et al. Magneto-rheological fluid behavior in squeeze mode. Smart Mater Struct2009; 18(9): 095001.
