To attenuate the low-frequency vibration transmitted to the driver, a nonlinear seat suspension with high-static-low-dynamic stiffness is designed. First, the force and stiffness characteristics are derived. The nonlinear suspension can achieve the quasi-zero stiffness at the static equilibrium position when the structural parameters are properly designed. Then, a car-seat-human coupled model which consists of a quarter car model, a seat suspension, and a 4 degree-of-freedom human model is established to predict the biodynamic response of the driver. Finally, the isolation performance of the high-static-low-dynamic stiffness seat suspension under two typical road excitations is evaluated separately based on the numerical method. The effects of stiffness ratio, damping ratio, and vehicle speed on the ride comfort are investigated. The results showed that the nonlinear seat suspension outperforms the equivalent linear counterpart and can achieve the best ride comfort when the quasi-zero stiffness condition is satisfied.
LeeCMGoverdovskiyVNTemnikovAI.Design of springs with “negative” stiffness to improve vehicle driver vibration isolation. J Sound Vib2007; 302: 865–874.
2.
NingDSunSZhangJ, et al. An active seat suspension design for vibration control of heavy-duty vehicles. J Low Freq Noise Vibr Act Control2016; 35: 264–278.
3.
AlfadhliADarlingJHillisAJ.The control of an active seat with vehicle suspension preview information. J Vib Control2018; 24: 1412–1426.
4.
DuXYuMFuJ, et al. H∞ control for a semi-active scissors linkage seat suspension with magnetorheological damper. J Intell Mater Syst Struct2019; 30: 708–721.
CarrellaABrennanMJWatersTP, et al. Force and displacement transmissibility of a nonlinear isolator with high-static-low-dynamic-stiffness. Int J Mech Sci2012; 55: 22–29.
7.
HuangXLiuXSunJ, et al. Vibration isolation characteristics of a nonlinear isolator using Euler buckled beam as negative stiffness corrector: a theoretical and experimental study. J Sound Vib2014; 333: 1132–1148.
8.
ZhouJWangXXuD, et al. Nonlinear dynamic characteristics of a quasi-zero stiffness vibration isolator with cam-roller-spring mechanisms. J Sound Vib2015; 346: 53–69.
9.
ChengCLiSWangY, et al. On the analysis of a high-static-low-dynamic stiffness vibration isolator with time-delayed cubic displacement feedback. J Sound Vib2016; 378: 76–91.
10.
ShanYWuWChenX.Design of a miniaturized pneumatic vibration isolator with high-static-low-dynamic stiffness. J Vib Acoust2015; 137 (4): 045001.
11.
YangXZhengJXuJ, et al. Structural design and isolation characteristic analysis of new quasi-zero-stiffness. J Vib Eng Technol2020; 8: 47–58.
12.
SuPWuJLiuS, et al. Theoretical design and analysis of a nonlinear electromagnetic vibration isolator with tunable negative stiffness characteristic. J Vib Eng Technol2020; 8: 85–93.
13.
ZhengYZhangXLuoY, et al. Analytical study of a quasi-zero stiffness coupling using a torsion magnetic spring with negative stiffness. Mech Syst Sig Process2018; 100: 135–151.
14.
SunMSongGLiY, et al. Effect of negative stiffness mechanism in a vibration isolator with asymmetric and high-static-low-dynamic stiffness. Mech Syst Sig Process2019; 124: 388–407.
15.
LiuXZhaoQZhangZ, et al. An experiment investigation on the effect of Coulomb friction on the displacement transmissibility of a quasi-zero stiffness isolator. J Mech Sci Technol2019; 33: 121–127.
16.
TangBBrennanMJ.On the shock performance of a nonlinear vibration isolator with high-static-low-dynamic-stiffness. Int J Mech Sci2014; 81: 207–214.
17.
WangYLiSChengC.Investigation on a quasi-zero-stiffness vibration isolator under random excitation. J Theor Appl Mech2016; 54: 621–632.
18.
LeTDAhnKK.A vibration isolation system in low frequency excitation region using negative stiffness structure for vehicle seat. J Sound Vib2011; 330: 6311–6335.
19.
YanZZhuBLiX, et al. Modeling and analysis of static and dynamic characteristics of nonlinear seat suspension for off-road vehicles. Shock Vib2015; 2015: 938205.
20.
ZhouJWangKXuD, et al. Vibration isolation in neonatal transport by using a quasi-zero-stiffness isolator. J Vib Control2018; 24: 3278–3291.
21.
LiangCCChiangCF.A study on biodynamic models of seated human subjects exposed to vertical vibration. Int J Ind Ergon2006; 36: 869–890.
22.
ChengCLiSWangY, et al. Force and displacement transmissibility of a quasi-zero stiffness vibration isolator with geometric nonlinear damping. Nonlinear Dyn2017; 87: 2267–2279.
23.
ChengCLiSWangY.Modeling and analysis of a high-static-low-dynamic stiffness vibration isolator with experimental investigation. J Vibroeng2018; 20: 1566–1578.
24.
LiuXXShiJLiGH.Biodynamic response and injury estimation of ship personnel to ship shock motion induced by underwater explosion. Proc 69th Shock Vib Symp1998; 18: 1–18.
25.
VerrosGNatsiavasSPapadimitriouC.Design optimization of quarter-car models with passive and semi-active suspensions under random road excitation. J Vib Control2005; 11: 581–606.
26.
VerrosGNatsiavasSStepanG.Control and dynamics of quarter-car models with dual-rate damping. J Vib Control2000; 6: 1045–1063.
27.
PapalukopoulosCNatsiavasS.Nonlinear biodynamics of passengers coupled with quarter car models. J Sound Vib2007; 304: 50–71.
28.
GriffinMJ.Handbook of human vibration. San Diego, CA: Academic press, 2012.
29.
ZhaoYZhaoLGaoH.Vibration control of seat suspension using H∞ reliable control. J Vib Control2010; 16: 1859–1879.
30.
ZongZLamKY.Biodynamic response of shipboard sitting subject to ship shock motion. J Biomech2002; 35: 35–43.
