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应用有限元软件ANSYS,建立了非线性接触有限元分析模型,分析了活塞与钻头碰撞的整个过程,得出了各个时刻的应力应变情况,以及关键节点的密塞斯应力和径向位移随时间的变化曲线。活塞应力最大的位置与活塞经常断裂处相吻合。
The finite element analysis software ANSYS is used to establish the nonlinear contact finite element analysis model. The whole process of the collision between the piston and the drill bit is analyzed. The stress and strain situation at each moment is obtained, and the Mouth’s stress and radial displacement of the key node are plotted with time The curve of change. The position of the piston with the maximum stress coincides with the frequent breakage of the piston.