An analysis of the interaction between crawler and soil by the particle element method

摘要

This paper describes a new approach that analyzes the interaction between crawler and soil by using the Particle Element Method (PEM). The traction characteristics of the crawler shoe are discussed in detail using an analytical model constructed by the PEM. An analytical model is built by the PEM to analyze the behavior of soil particles. The model consists of a shoe, load weights and soil. In laboratory experiments, motion of the shoe is measured to verify the validity of the analytical model, and slip displacement and traction force are measured to examine dependency of traction characteristics. As a result, the analytical results are very similar to the experimental results. By analyzing soil particle flows and the traction force on each face of the shoe, the influence of ground pressure on the relationship between slip displacement and traction force is considered carefully. It is understood that the larger the ground pressure, the more hardened is the soil and the slower it flows, and in such conditions, contact forces from the contact particles to the underside of spacing and the inner side of the rear grouser are stronger so that the shoe does not move easily. As mentioned above, it is found that the PEM is quite effective in the analysis of the interaction between crawler and soil.