Modeling and Analysis of Static and Dynamic Characteristics of Nonlinear Seat Suspension for Off-Road Vehicles

Yan, Zhenhua; Zhu, Bing; Li, Xuefei; Wang, Guoqiang

doi:10.1155/2015/938205

Cited by 17 publications

(13 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Modelling the suspension seat is necessary to develop an improved suspension seat system [6,7]. One of the most commonly developed is the lumped-parameter model [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Mathematical Model of Suspension Seat-Person Exposed to Vertical Vibration for Off-Road Vehicles

Adam

Jalil

Razali

et al. 2019

IJAME

View full text Add to dashboard Cite

Off-road drivers are exposed to a high magnitude of vibration at low frequency (0.5-25Hz), that can cause harm and possibly attribute to musculoskeletal disorder, particularly low-back pain. The suspension seat is commonly used on an off-road condition to isolate the vibration transmitted to the human body. Nevertheless, the suspension seat modelling that incorporates the human body is still scarce. The objective of this study is to develop a mathematical modelling to represent the suspension seat-person for off-road vehicles. This paper presents a three degrees-of-freedom lumped parameter model. A curve-fitting method is used for parameter identification, which includes the constraint variable function (fmincon()) from the optimisation toolbox of MATLAB(R2017a). The model parameters are optimised using experimentally measured of suspension seat transmissibility. It was found that the model provides a reasonable fit to the measured suspension seat transmissibility at the first peak of resonance frequency, around 2-3 Hz. The results of the study suggested that the human body forms a coupled system with the suspension seat and thus affects the overall performance of the suspension system. As a conclusion, the influence of the human body should not be ignored in the modelling, and a three-degrees degree-of-freedom lumped parameter model provides a better prediction of suspension seat transmissibility. This proposed model is recommended to predict vibration transmissibility for off-road suspension seat.

show abstract

“…Modelling the suspension seat is necessary to develop an improved suspension seat system [6,7]. One of the most commonly developed is the lumped-parameter model [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Mathematical Model of Suspension Seat-Person Exposed to Vertical Vibration for Off-Road Vehicles

Adam

Jalil

Razali

et al. 2019

IJAME

View full text Add to dashboard Cite

show abstract

“…Both occurred by exciting the quarter car model with a random road profile of Classes A and B and then applying the response of its sprung mass to the seat’s base. The optimization is conducted in the conventional suspension system—one of Carrella et al, 22–24 Le et al, 25 Yan et al, 29 and Antoniadis et al 31,32 The vibration isolators are optimized with GAs applying appropriate objective functions. Specific constraints are applied to the optimization problem aiming not only at a compact structure able to fit in a passenger vehicle but also a comfortable one.…”

Section: Optimizationmentioning

confidence: 99%

“…More specifically, the peak transmissibility and the starting frequency of the isolation never overshoot those of the linear counterpart, no matter how large the excitation amplitude. Moreover, Yan et al 29 designed a novel nonlinear seat suspension structure using the conceptual design of CRSMs for off-road vehicles, whose static characteristics and seat-human system dynamic response were modeled and analyzed, and experiments were conducted to verify the theoretical solutions. In addition, Zhao et al 30 developed a new type of seat suspension with a hollow composite rubber spring analyzing by test and simulation the acceleration transmissibility.…”

Section: Introductionmentioning

confidence: 99%

Optimal design of passenger vehicle seat with the use of negative stiffness elements

Παπαϊωάννου

Voutsinas

Koulocheris

2019

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

A seat that provides good vibration isolation is of prime importance for passenger’s safety and health. The main conflict in seat suspensions implies that the increasing initial deformation of the system (increase in “static discomfort”) leads to better isolation of accelerations (increase in “dynamic comfort”). Many researchers have focused on overcoming or at least suppressing this conflict between load support capacity and vibration isolation by modeling new suspension systems, such as the so-called negative suspension systems. However, apart from the modeling of new suspension systems, optimization is an important part in designing a seat and finding the best compromise between these two objectives. Thus, in this work, four types of seat suspension systems with embedded negative stiffness elements are implemented and optimized in order to be benchmarked. Three of them have already been tested either in passenger or in an off-road vehicle seat. All the vibration isolators are optimized with genetic algorithms in respect to static and dynamic factors of ride comfort by applying constraints oriented to the objectives and the design of the structure. The optimization is implemented for two excitations, which correspond to a vehicle driving over road profiles of Classes A and B, and the common solutions are outlined.

show abstract

“…But the biodynamic response of a driver was not taken into consideration. Then, Yan et al 19 proposed an HSLDS seat suspension whose stiffness corrector is similar to the prototype reported in Zhou et al 8 A 4-degree-offreedom (4-DOF) human body model was coupled with the proposed seat suspension. However, the vehicle ride comfort under shock and random excitations induced by uneven road profiles was not investigated.…”

Section: Introductionmentioning

confidence: 95%

Enhanced ride comfort using nonlinear seat suspension with high-static-low-dynamic stiffness

Cheng

2020

Noise & Vibration Worldwide

View full text Add to dashboard Cite

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.

show abstract

Modeling and Analysis of Static and Dynamic Characteristics of Nonlinear Seat Suspension for Off-Road Vehicles

Cited by 17 publications

References 28 publications

Mathematical Model of Suspension Seat-Person Exposed to Vertical Vibration for Off-Road Vehicles

Mathematical Model of Suspension Seat-Person Exposed to Vertical Vibration for Off-Road Vehicles

Optimal design of passenger vehicle seat with the use of negative stiffness elements

Enhanced ride comfort using nonlinear seat suspension with high-static-low-dynamic stiffness

Contact Info

Product

Resources

About