Dynamic characteristics of plough head under contact-impact with clearances

Horizontal clearance and vertical one between plough head and sliding framework were considered. The criterion of contact-impact between plough head and sliding framework were established with the collision detection method using the distance between a point and a line. The plough head's dynamic equation with 3-DOF vibro-impact under clearance conditions was established by using a nonlinear spring-damper contact force model. The numerical simulation was performed by using Runge-Kutta method. The results showed that there are single-point impact, two-point impact and three-point impact between plough head and sliding framework under clearance conditions; the maximum collision force at each contact point between plough head and sliding framework firstly increases and then decreases with increase in vertical clearance, and increases with increase in horizontal clearance. The plough head's dynamic model was adopted for simulation with RecurDyn. The results agreed well with those of the theoretical analysis. ©, 2015, Chinese Vibration Engineering Society. All right reserved.