Effects of tyre inflation pressure and forward speed on vibration of an unsuspended tractor

Cường, Đỗ Minh; Zhu, Shengyang; Zhu, Yue

doi:10.1016/j.jterra.2013.05.001

Cited by 29 publications

(20 citation statements)

References 37 publications

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“…e site map and the test rig are demonstrated in Figure 6. e test rig system includes support frame (1), acceleration sensor (2), weight plate (3), rings (4), tire (5), rope (6), beam (7), linear bearing beam (8), displacement sensor (9), holder of sensor (10), suction plate (11), suspension bracket of magnetic lifter (12), magnetic lifter (13), ground (14), tire connection plate (15), linear bearing (16), and guide rods (17).…”

Section: Derivation Procedures Of Model Parametersmentioning

confidence: 99%

“…Adam and Jalil [16] performed measurements on a healthy male tractor driver to determine the vertical suspension seat transmissibility and SEAT values. In addition, some researchers measured the vertical vibration accelerations of the front axles, rear axles, and cabin for the two-wheel-drive tractor under different road conditions and forward speeds [17][18][19]. Also, Nguyen and Inaba [20] measured the vertical wheel load of the left and right rear wheels and the roll, bounce, and pitch accelerations of the rear axle center on an asphalt road and a sandy loam field.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

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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: Derivation Procedures Of Model Parametersmentioning

confidence: 99%

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

View full text Add to dashboard Cite

show abstract

“…It is noteworthy that, in addition to the type of activity performed, machinery speed, tire calibration, terrain type, among other variables considerably interfere with the vibration and noise indices transmitted to the operator [24,25].…”

Section: Occupational Vibration Assessmentmentioning

confidence: 99%

Occupational Noise and Vibration Assessments in Forest Harvesting Equipment in North-eastern Brazil

Lima

Souza

et al. 2019

JEAI

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Occupational hazards arising from physical agents present in wood harvesting equipment may cause irreversible damage to the health of exposed operators. Thus, the objective of this study was to quantify the noise and vibration levels emitted by three types of wood harvesting equipment (Feller-buncher, Harvester and Forwarder) in a forestry company in north-eastern Brazil during a workday. Noise measurements were performed with an equivalent noise level meter (audiodosimeter) at the workstation and compared with the limits set in NR-15. To evaluate the vibration was used a full cup gauge, which has a sensor called triaxial accelerometer (directions X, Y and Z), installed on the operator's seat. As a result, the average noise dose of all activities in the operation studied did not exceed the maximum allowable limit of 85 dB (A) for 8 hours of continuous Lima et al.; JEAI, 40(5): 1-9, 2019; Article no.JEAI.51345 2 work. The whole body vibration in all equipment was below the exposure level, however, some equipment obtained indexes slightly higher than the alert level, a fact that shows a higher accuracy in the equipment. Original Research Article

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“…Farming practices such as applying pesticides and harvesting are critical and cannot always be adjourned until appropriate soil wetness is reached in agricultural fields. Moreover, farm machine characteristics such as tire inflation pressure, type and size, wheeling distribution on soil and vibration intensity affect soil compaction intensity.…”

Section: Introductionmentioning

confidence: 99%

Load dissipation by corn residue on tilled soil in laboratory and field-wheeling conditions

Reichert

Brandt

Rodrigues

et al. 2015

J. Sci. Food Agric.

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Crop residues may partially dissipate applied loads and reduce soil compaction. We evaluated the effect of corn residue on energy-applied dissipation during wheeling. The experiment consisted of a preliminary laboratory test and a confirmatory field test on a Paleaudalf soil. In the laboratory, an adapted Proctor test was performed with three energy levels, with and without corn residue. Field treatments consisted of three 5.1 Mg tractor wheeling intensities (0, 2, and 6), with and without 12 Mg ha(-1) corn residue on the soil surface. Corn residue on the soil surface reduced soil bulk density in the adapted Proctor test. By applying energy of 52.6 kN m m(-3) , soil dissipated 2.98% of applied energy, whereas with 175.4 kN m m(-3) a dissipation of 8.60% was obtained. This result confirms the hypothesis that surface mulch absorbs part of the compaction effort. Residue effects on soil compaction observed in the adapted Proctor test was not replicated under subsoiled soil field conditions, because of differences in applied pressure and soil conditions (structure, moisture and volume confinement). Nevertheless, this negative result does not mean that straw has no effect in the field. Such effects should be measured via stress transmission and compared to soil load-bearing capacity, rather than on bulk deformations. Wheeling by heavy tractor on subsoiled soil increased compaction, independently of surface residue. Two wheelings produced a significantly increase, but six wheelings did not further increase compaction. Reduced traffic intensity on recently tilled soil is necessary to minimize soil compaction, since traffic intensity show a greater effect than surface mulch on soil protection from excessive compaction. © 2015 Society of Chemical Industry.

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Effects of tyre inflation pressure and forward speed on vibration of an unsuspended tractor

Cited by 29 publications

References 37 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

Occupational Noise and Vibration Assessments in Forest Harvesting Equipment in North-eastern Brazil

Load dissipation by corn residue on tilled soil in laboratory and field-wheeling conditions

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