Abstract：Based on single-degree-of-freedom（single-DOF）dynamic model of a coal plough and according to actual work conditions of a coal plough, multi-degree-of-freedom（multi -DOF） nonlinear dynamic model of a coal plough was presented. And the factors of stochastic forces of coal, pretension force of chain and sprocket polygon effect were considered for the dynamic model. MATLAB/Simulink soft ware was used to get numerical solution and simulation, and the changes of the plough body velocity and the chain tension were gained under the influence of each factor. The results showed that influences of forces of coal and pretension force of chain obvious on the plough body velocity and the chain tension, influence of sprocket polygon effect is less, and stochastic forces of coal reduce the influence of sprocket polygon effect. Comparing single-DOF dynamic model with multi-DOF dynamic model, the change under the influence of each factoris the same, and single-DOF dynamic model can be as reference for simple analysis of coal plough, but multi-DOF dynamic model accords with actual working conditions more. It provides theoretical basis for analyzing dynamic problem of coal plough and improving the reliability of plough chain.
2010, Vol. 29 
