The Simplified Dynamic Model,Measurement and Evaluation of Ride Vibration for the Combination Unit of Agricultural Hand Tractor and Trailer

SUMMARY

In this paper, a mathematical model of four degree-of-freedom of the combination unit has been developed, which was formulated by means of the modal synthesis technique. The spectral matrix of acceleration response of the combination unit was derived on the basis of the model. The relationship between the spectral matrix and the road roughness spectrum was given also.

Measurements of ride vibration of the combination unit on several types of roads were made and recorded, the signals recorded on the tapes were data-processed with the real time signal analyzer. Then, an evaluation of ride comfortability of the combination unit was made according to the relevant international standards.