植树挖坑机钻头纵向振动数学建模与数值仿真研究

In the paper, taking advantage of the spatial kinematics, the theory of mechanization vibration and the principle of elastic dynamics the author established emphatically the longitudinal vibration model of auger-bit and found its solution by method of numerical value, at the same time, analyzed systematically the interaction force between bottom of auger-bit and soil, auger-bit gravity and inertia, gave the dynamical stochastic boundary condition and initial condition and put up simulation experiment with the software that the author exploited. Based on the spot testing ,the results showed that the model and the software was correct and effective, which can provide new theoretic basis for whole machine dynamic characteristic research, rationally forecasting and controlling movement rule of auger-bit, improving the dynamic characteristic of auger-bit, enhancing work efficiency of auger-bit and improving design method of auger-bit.