Abstract
This report studies about generation mechanism of tractive force in driving, which has not been sufficiently studied yet. The distribution and time history of tension, dynamic ground pressure, dynamic shearing stress, slip and slip ratio of a crawler belt contacting with the road are provided in details through theoretical analysis. It is demonstrated that the tractive force does not generate continuously at real time, but repeats time history of complex positive and negative pulsation. This time history of tractive force relates with the speed change of the vehicle originated by the unevenness with which track links are wound by a driving tumble. The frequency of tractive force corresponds well with that of vehicle speed change.
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