Source code used to establish the dynamic model from Effect of contact characteristics on the self-rotation performance of conical picks based on impact dynamics modelling

Conical picks have a harsh working environment and 70% of their failures are caused by wear. It has been found that conical picks can rotate while interacting with the working material. This self-rotation ability is an important factor affecting pick wear, but the self-rotation mechanism remains unclear. Researching the mechanism involves the impact and friction dynamics of the interaction between a pick and its holder. Thus, a dynamic finite-element numerical model for the pick–holder interaction is established. How the handle–holder gap width, pick body and handle lengths and pick handle diameter affect the settling time and the percentage of time with no contact is studied to compare the numerical results with the equivalent effects on the rotation angle in experiments. Doing so indicates that the main factor in the self-rotation ability of a conical pick is not the magnitude of the contact load but its duration. The present research provides a new method for revealing the mechanism for the self-rotation of conical picks.圆锥截齿（conical picks）的作业环境极为恶劣，其70%的故障均由磨损引发。研究发现，圆锥截齿在与作业物料相互作用时可发生自转。该自转特性是影响截齿磨损的关键因素之一，但其自转机制至今仍不明确。对该机制的研究涉及截齿与夹持器（pick holder）相互作用过程中的冲击与摩擦动力学问题。为此，本研究建立了截齿-夹持器相互作用的动态有限元数值模型（finite-element numerical model）。本研究分析了柄-夹持器间隙宽度、截齿体与柄部长度以及截齿柄直径对稳定时间与无接触时长占比的影响，并将数值模拟结果与实验中自转角度的等效影响进行对比。结果表明，圆锥截齿自转能力的核心影响因素并非接触载荷的大小，而是其作用时长。本研究为揭示圆锥截齿的自转机制提供了全新的研究方法。