日本語フィールド
著者：V.N.Nguyen , S.Inaba題名：Effects of tire inflation pressure and tractor velosity on dynamic wheel load and rear axle vibrarions発表情報：Journal of Terramechanics 巻: 48 ページ: 3-16キーワード：Dynamic wheel load, Vibration, Tire non-uniformity, Tire lug,Wavelet analysis,Fourier analysis概要：抄録：The objective of this study was to evaluate the effect of agricultural tire characteristics on variations of wheel load and vibrations transmitted from the ground to the tractor rear axle. The experiments were conducted on an asphalt road and a sandy loam field using a two-wheel-drive self-propelled farm tractor at different combinations of tractor forward speeds of approximately 0.6, 1.6 and 2.6m/s, and tire inflation pressures of 330 and 80kPa. During experiments, the vertical wheel load of the left andright rear wheels, and the roll, bounce and pitch accelerations of the rear axle center were measured using strain-gage-based transducers and a triaxial accelerometer. The wacelet and Fourier analyses were applied to measured data in order to investigate the effects of self-excitations due to non-uniformaity and lugs of tires on the wheel-load fluctuation and rear axle vibrations. Values for the root-mean-squares eheel loads and accelerations were not strictly proportional and inversely proportional to the forward speed and tire pressure respectively. The time histories and frequency compositions of synthesized data have shown that tire non-uniformity and tire lugs significantly excited the wheel load and accelerations at their natural frequencies and harmonics. These effects were strongly affected by the forward speed, tire pressure and ground deformation.英語フィールド
Author：V.N.Nguyen , S.InabaTitle：Effects of tire inflation pressure and tractor velosity on dynamic wheel load and rear axle vibrarionsAnnouncement information:Journal of Terramechanics Vol: 48 Page: 3-16Keyword：Dynamic wheel load, Vibration, Tire non-uniformity, Tire lug,Wavelet analysis,Fourier analysisAn abstract：The objective of this study was to evaluate the effect of agricultural tire characteristics on variations of wheel load and vibrations transmitted from the ground to the tractor rear axle. The experiments were conducted on an asphalt road and a sandy loam field using a two-wheel-drive self-propelled farm tractor at different combinations of tractor forward speeds of approximately 0.6, 1.6 and 2.6m/s, and tire inflation pressures of 330 and 80kPa. During experiments, the vertical wheel load of the left andright rear wheels, and the roll, bounce and pitch accelerations of the rear axle center were measured using strain-gage-based transducers and a triaxial accelerometer. The wacelet and Fourier analyses were applied to measured data in order to investigate the effects of self-excitations due to non-uniformaity and lugs of tires on the wheel-load fluctuation and rear axle vibrations. Values for the root-mean-squares eheel loads and accelerations were not strictly proportional and inversely proportional to the forward speed and tire pressure respectively. The time histories and frequency compositions of synthesized data have shown that tire non-uniformity and tire lugs significantly excited the wheel load and accelerations at their natural frequencies and harmonics. These effects were strongly affected by the forward speed, tire pressure and ground deformation.