Resonance Identification and Mode Shape Analysis of Tractor Vibrations.

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  • GARCIANO Leroy
    The Japanese Society of Agricultural Machinery Faculty of Agriculture, Iwate University
  • TORISU Ryo
    The Japanese Society of Agricultural Machinery Faculty of Agriculture, Iwate University
  • TAKEDA Jun-ichi
    The Japanese Society of Agricultural Machinery Faculty of Agriculture, Iwate University
  • YOSHIDA Jun
    Faculty of Agriculture, Iwate University

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  • トラクタ車体部の固有振動数の決定

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Abstract

The dynamic behavior of a larger size tractor at higher working speeds was investigated using two types of frequency response tests by conducting a vertical and pitch mode experiment and roll mode experiment. The experiment was conducted by running the tractor with all wheels on the artificial test track and with the right side front and rear wheels of the tractor on the test track. The results of the investigation showed resonance in the frequency of 3.2Hz in the vertical mode of vibration and in the frequency of 4.3-4.8Hz in the pitch mode which were determined in the vertical and pitch mode experiment.<br>The existence of the roll mode of vibration was estimated to be in the lower frequency range of 0.9-1.7Hz and in the higher frequency range of 5.4-5.6Hz. The subharmonic frequencies that occurred within the speed range of 2.34-3.71m/s indicated the existence of nonlinear vibration characteristics of the tractor.

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