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Coupled Systems Mechanics
  Volume 9, Number 5, October 2020, pages 455-471

Natural frequency analysis of tractor tire with different ground contacts and inflation pressures
Do Minh Cuong and Zhu Sihong

    This paper presents the results of the study of vertically natural frequency of tractor tires are effected by changing different ground contacts and inflation pressures using the Free Decay Method. The results show that the natural frequencies of the tire are not affected while the vertical acceleration increased strongly due to the increase of inflation pressure when the tire performs free decay vibration on rigid ground. In addition, the number of natural frequency peaks of the tire also increases with increasing tire inflation pressure. On the other hand, the natural frequencies of the tractor tire increases strongly while the vertical acceleration decreases slightly with the increase of tire inflation pressure as the tire performs free decay vibration on soft soil. Further, the natural frequencies of tire–soil system are always higher than that of tire only, and it changed with changing the soil depth. Results also show the natural frequency of tire and tire–soil system is in the range of 3.0 to 10.0 Hz that lie within the most critical natural frequency range of the human body. These findings have to be mentioned and used as design parameters of the tractor suspension system.
Key Words
    tractor tire; inflation pressure; natural frequency; decay method; FFT
Do Minh Cuong: Department of Mechanical Engineering, University of Agriculture and Forestry, Hue University,
102 Phung Hung, Hue city, Vietnam
Zhu Sihong: College of Engineering, Nanjing Agricultural University, Nanjing 210031, PR China

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