基于有限元方法的凸齿镇压器运动学和动力学分析

Kinematics and Dynamics Analysis of Toothed Wheel Based on Finite Element Method

为探索凸齿镇压器在作业过程中的运动学和动力学特性,基于验证有效性后的有限元模型,求解了凸齿镇压器外缘点运动轨迹和速度以及加速度随时间的变化规律曲线。结果表明:轮缘点所在凸齿冲击土壤的行为并未在轮缘点竖直方向速度最大时完成;凸齿镇压器轮缘外一点的绝对运动轨迹呈波动状态的余摆线形式;凸齿镇压器轮缘点在接地位置有与前进方向相反的相对滑动。

In order to investigate the kinematics and dynamics characteristics of operating toothed wheel, we adopted the validated finite ele- ment model, solved the toothed wheel rim point motion trajectory, and obtained the change rule curves of velocity and acceleration velocity with the time. It was found that when toothed wheel rim point hit the soil, the speed at vertical direction did not reach its maximum; motion trajectory of toothed wheel rim point presented to be a fluctuating trochoidal curve. At the bottom of micro-basin, toothed wheel rim point mo- tion had relative sliding in the opposite direction of movement.