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http://dx.doi.org/10.7843/kgs.2018.34.9.33

Fundamental Study on the Effect of Grousers on the Soil Thrust of Off-road Tracked Vehicles  

Baek, Sung-Ha (Dept. of Civil & Environmental Engrg., Gachon Univ.)
Chung, Choong-Ki (Dept. of Civil & Environmental Engrg., Seoul National Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.34, no.9, 2018 , pp. 33-42 More about this Journal
Abstract
When an off-road tracked vehicle travels, an engine thrust that is transmitted to the continuous track induces a shearing action on the soil-track interface. Consequently, the relative displacement known as slip displacement takes place on the soil-track interface, which develops an associated soil thrust acting as a traction force. For the loose or soft ground conditions, an excessively large slip displacement can be required for the development of the desired soil thrust which will make the tracked vehicle mobile and therefore the outer surface of the continuous track is generally designed to protrude with grousers. This paper fundamentally studied the effect of grousers on the soil thrust of off-road tracked vehicles. Based on the soil-track interaction theory, a new soil thrust assessment method that properly takes into account the effect of grousers was developed. Also, the soil thrust of off-road tracked vehicles equipped with a number of grousers was evaluated using the developed assessment method. The results showed that grousers increased the soil thrust of the continuous track, enhancing the overall tractive performance of off-road tracked vehicles. These effects were more obvious as the height of grouser increased and the spacing of grouser decreased; thus, it is concluded that the grouser which has smaller shape ratio (span of the grouser to a grouser height) significantly enhances off-road tracked vehicle's performance.
Keywords
Grouser; Soil thrust; Off-road tracked vehicle; Continuous track; Tractive performance;
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