Prediction of the vibration characteristics for wheeled tractor with suspended driver seat including air spring and MR damper

Zheng, Enlai; Fan, Yindong; Zhu, Rui; Zhu, Yue; Xian, Jieyu

doi:10.1007/s12206-016-0826-x

Cited by 31 publications

(15 citation statements)

References 17 publications

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“…In order to study the influence of implement's mass on the vibration characteristics of the tractor/implement system, Zhu et al [29] established a two-degree-of-freedom vibration model of the tractor with a rear implement. On this basis, Zheng et al [30] developed a complete nonlinear dynamic model of the wheeled tractor with a suspended driver seat including air spring and MR damper, and the effects of nonlinear stiffness for scissors linkage seat, the air spring with auxiliary chamber as well as MR damper, and dynamic characteristics of real tire are also considered in this model. e presented half-vehicle model can also be used to describe the lateral dynamics, with the roll and heave motion of the tractor body and the vertical motion of the left and right wheels.…”

Section: Introductionmentioning

confidence: 99%

Simulation of the Vibration Characteristics for Agricultural Wheeled Tractor with Implement and Front Axle Hydropneumatic Suspension

Zheng

Cui

Yang

et al. 2019

Shock and Vibration

Self Cite

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The dynamic model is significant for the analysis of the vibrational characteristics of the wheeled tractor system with implement and front axle hydropneumatic suspension. In this work, the nonlinear stiffness and damping equations are derived first. The dynamic coupling relationship among cabin, three-point hitch structure, and implement are figured out, and the dynamic model of the half agricultural wheeled tractor/implement system is presented considering the effects of three-point hitch structure, passive silent blocks of cabin, and front axle hydropneumatic suspension together. To validate the model, the power spectral densities (PSDs) of the driver seat, cabin, chassis, and implement acquired from numerical simulations are compared with those from experiments, respectively. Under different forward speeds, two groups of results match well. Based on the model, the influences of passive cabin suspension, implement, and front axle hydropneumatic suspension on the dynamical characteristics of the tractor system are investigated. Results indicate that the front axle hydropneumatic suspension will deteriorate the ride comfort of the driver but improve the handing stability. The passive cabin suspension reduces the operational stability while improving much more ride comfort than the front axle hydropneumatic suspension does. The driver’s comfortableness will be increased due to implement; meanwhile, handling stability will be compromised. Besides, the impacts of initial nitrogen volume, pressure of accumulators, and orifice diameter of throttle valves on the vibration characteristics of the tractor system are also inspected.

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Section: Introductionmentioning

confidence: 99%

Simulation of the Vibration Characteristics for Agricultural Wheeled Tractor with Implement and Front Axle Hydropneumatic Suspension

Zheng

Cui

Yang

et al. 2019

Shock and Vibration

Self Cite

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“…Voigtla¨nder et al 16 discussed and optimized the vibrational performance of passive pneumatic isolators with air springs for microscopy. Zheng et al 17 analyzed a wheeled tractor with suspended driver seat including air spring and magnetorheological (MR) damper. Zhang et al 18 proposed an experience method to isolate the structural vibration by combined electromagnetic actuator and air springs, which can isolate the structural vibration effectively in high-frequency range and constrain the peak response value near the natural frequency.…”

Section: Introductionmentioning

confidence: 99%

Analysis of vibration isolation performance of parallel air spring system for precision equipment transportation

Liu

et al. 2019

Measurement and Control

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Precision equipment is usually accompanied with vibrations during road or railway transportation. Sometimes the vibration exceeds the given limit, leading to the damage of the equipment. It is necessary to control the vibration during the transportation. However, it is still difficult to adjust the parameters of a designed vibration isolation system for the transportation of different precision equipment under various road conditions. Aiming at satisfying the vibration isolation requirements of different precision equipment, this paper proposes a parallel air spring vibration isolation system based on the principle of limiting lateral deflection. According to the measured parameters, a rigid-body dynamics simulation model of parallel air spring vibration isolation system is established. Then its feasibility is verified, and the optimal parameters of the vibration isolation system are obtained by a simulation. Finally, the vibration isolation system is built and installed in the equipment to carry out the real vehicle transportation test. The test results show that the transportation vibration isolation system based on the parallel air spring structure has not only excellent vibration isolation efficiency but also acceptable lateral stability. The research results in this paper can provide a reference for the design of the vibration isolation system for the large precision equipment transportation.

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“…Master body, which is related with seat frame, is assigned with resin epoxy, and slave body, which is detached to the master body, is assigned with poly amide of PA6.6, polypropylene (PP), poly lactic acid(PLA), acrylonitrile butadiene styrene(ABS) to see the tendency of damage depending on materials. Table 2 shows the weight of slave body with different materials [9][10][11][12][13][14][15]. Figure 3 is the condition for analyzing this study.…”

Section: Introductionmentioning

confidence: 99%

A study on damage to mechanical seat cushion made from different materials of extension frame

Kim¹,

Cho²,

Cho³

et al. 2018

IJET

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Background/Objectives: : Automotive seat is a very important component to prevent accidents by reducing passenger’s tiredness, thus, this study worked on analyzing damage with different materials of extension frames of mechanical seat cushions.Methods/Statistical analysis: In this study, we performed an experiment on cushion extension frames by splitting it into two parts. We studied about the damage prediction of slave body for each material property of ABS, PP, PLA, and PA6.6. For analyzing the condition, we assigned the side part of the master body for fixed support, and we progressed on analysis by applying with 690N on the entire part of the slave body.Findings: This research worked on the study of damage to different materials of extension frames of seat cushions. After confirming the stress equivalence of the entire model for each material, PP showed the highest equivalent stress of 180.88MPa, and ABS showed the lowest equivalent stress of 151.73MPa. Overall, we could see that in the order of ABS, PA6.6, PLA, PP have a higher tendency to be broken. In addition, when confirming equivalent stress of master body depending on materials of slave body, PA6.6 showed the highest equivalent stress of 166.3MPa, and ABS showed the lowest equivalent stress of 124.06MPa. Overall, we could see that in the order of ABS, PP, PLA and PP6.6 have a higher tendency to be broken. In comparing shear stress on the gear part, which has the highest tendency to be broken in among the entire model, depending on the material of the slave body, PLA showed the greatest shear stress of 88.945MPa, and ABS showed the lowest shear stress of 69.766MPa.Improvements/Applications: This study worked for the improvements and applications of cushion extension frames as the securement of material by investigating these factors.

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Prediction of the vibration characteristics for wheeled tractor with suspended driver seat including air spring and MR damper

Cited by 31 publications

References 17 publications

Simulation of the Vibration Characteristics for Agricultural Wheeled Tractor with Implement and Front Axle Hydropneumatic Suspension

Simulation of the Vibration Characteristics for Agricultural Wheeled Tractor with Implement and Front Axle Hydropneumatic Suspension

Analysis of vibration isolation performance of parallel air spring system for precision equipment transportation

A study on damage to mechanical seat cushion made from different materials of extension frame

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