Abstract
Power requirements for tracked vehicles moving in deep medium-to-high density snow are calculated. A volumetric constitutive law is used to determine the energy absorbed by the pressure bulb under the vehicle. Also shearing effects along the pressure bulb wall and in the pressure bulb are taken into account. A parametric study is made to determine the effect of initial density, track pressure, vehicle speed and track geometry on track efficiency. The results show that if the snow material properties are expressible in terms of a constitutive law, the method presented can be of considerable use for predicting certain aspects of vehicle performance in snow and for evaluating the structure of the pressure bulb below the vehicle track.
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