Contact and Joint Forces Modeling and Simulation of Crawler-formation Interactions

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Cable shovels are used in surface mining operations to achieve economic bulk production capacities. The service life of the  rawlers and their shoes define shovel reliability, maintainability, availability and efficiency. The crawler track-terrain  interaction generates high time-fluctuating contact forces that result in stress buildup, crack and fatigue failure of    wler shoes. In addition, the link pins that connect two crawler shoes can exert large fluctuating pin loads on shoe lugding to shoe breakage.

Crawler-formation Interactions

This paper addresses fundamental research into contact forces acting on crawler shoes, joint forces generated in the link pin and total deformation of the formation during shovel propel. During propel, the crawler track is controlled by two drive constraints that cause the crawler to follow straight or turning motions. A virtual prototype simulator of the crawler-terrain interaction dynamics is developed and simulated within the MSC ADAMS environment. The simulation results show that the average penetration depth for different crawler shoes is within the range of 5.9 and 6.7 cm for both types of driving constraints.

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