Nonlinear Dynamics Analysis of Vibratory Subsoiler

摘要

Acting force between deep-shovel and soil is complicated variable in farming. To establish nonlinear mechanics model of vibratory subsoiler, force analysis of deep-shovel is carried out, and the soil is equivalent to a viscoelastic material. It adopts qualitative method to analyze the effect of small disturbance on system bifurcation. Runge-Kutta numerical integration algorithm with variable time step was used to solve the system equation, and phase plane plots and bifurcation diagrams of system are obtained. On the basis of the above data, the influence of exciting force on nonlinear dynamics of system is analyzed. The results indicate that motion of deep-shovel is relatively complicated under the special working condition, and the system movement which is frequently changeful from period n to chaos present singularity phenomenon. A vibratory subsoiler is tested in site, and the analysis further shows that chaos can be used to reduce traction resistance of tractor by contrast with simulation data and experimental data.