Karafiath, L L (1988) Rolling resistance of off-road vehicles. Journal of Construction Engineering and Management, 114(3), pp. 458-471. ISSN 0733-9364
Abstract
The rolling resistance (RR) of vehicles operating off-road is, despite its significance, an uncertain factor in haul-time and productivity estimates. The rule-of-thumb formula used for estimating the RR consistently underestimates the RR of free-rolling (nondriven) tires. The RR of driven tires is shown to vary considerably with the applied torque; at high torque (in low gears) it may be several times greater than the RR of free-rolling tires. This increase of the RR may result in a decrease in productivity, or at worst, in the immobilization of off-road vehicles. The use of an analytical tire-soil interaction model is a rational method of estimating the RR of both free-rolling and driven tires and, by summation, the total RR of wheeled off-road vehicles. Performance data sets consisting of rimpull and RR values for various values of slip, obtained from this model, present a realistic simulation of the interaction between vehicle and soil. Their use in conjunction with rimpull-speed relations supplied by manufacturers improves haul-time calculations and allows the performance of unbiased comparative analyses of various candidate vehicles for a variety of routing and soil conditions.
| Item Type: | Article |
|---|---|
| Index terms: | estimate, interaction, productivity, estimating, comparative analysis, manufacturer |
| Subjects: | management, behavioral psychology, practitioner, data analysis and analytics, financial and cost management |
| Topics: | Research Practice, Cost Management, Business Strategy, Roles and Professions |
| Descriptive scope: | 3 PCA |
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