In the discrete element method (DEM) simulation for wear prediction, structural boundary is now represented extensively by triangular meshes with high resolution, which brings a huge computational cost. A DEM‐based method for predicting the wear evolution of structural boundary has been developed for computational efficiency. The structural boundary subjected to wear is represented by the spherical boundary elements in the DEM simulation in combination with the inside triangles and fitting curved surface in wear prediction. Wear prediction is performed through a series of evolution steps. In each evolution step, the collision energies by particles at structural boundary are collected via the DEM simulation and assigned to the boundary elements. Then, the volume losses of structural boundary are predicted across each relevant boundary element. Finally, the new geometry of structural boundary in response to wear is described by moving the boundary elements along the depths of wear individually. Through converting the contact detection between structural boundary and particles into between spherical boundary elements and particles, our method greatly reduces the computational cost in the DEM simulation. Through two numerical tests, our method has been verified to be an efficient and accurate method for the wear prediction of structural boundaries with different resolutions.

中文翻译：

---

基于DEM的预测由球形边界元素构成的结构边界的磨损演变的方法

在用于磨损预测的离散元方法（DEM）模拟中，结构边界现在由具有高分辨率的三角形网格广泛地表示，这带来了巨大的计算成本。为了提高计算效率，已经开发了一种基于DEM的预测结构边界磨损演变的方法。经受磨损的结构边界由DEM模拟中的球形边界元素与内部三角形和磨损预测中的拟合曲面结合起来表示。磨损预测是通过一系列演变步骤执行的。在每个演化步骤中，通过DEM模拟收集结构边界处的粒子碰撞能，并将其分配给边界元素。然后，跨每个相关边界元素预测结构边界的体积损失。最后，通过沿磨损深度单独移动边界元素来描述响应于磨损的结构边界的新几何形状。通过将结构边界和粒子之间的接触检测转换为球形边界元素和粒子之间的接触，我们的方法大大降低了DEM仿真的计算成本。通过两次数值测试，我们的方法已被证明是一种有效且准确的方法，可用于预测不同分辨率的结构边界的磨损。我们的方法大大降低了DEM仿真的计算成本。通过两次数值测试，我们的方法已被证明是一种有效且准确的方法，可用于预测不同分辨率的结构边界的磨损。我们的方法大大降低了DEM仿真的计算成本。通过两次数值测试，我们的方法已被证明是一种有效且准确的方法，可用于预测不同分辨率的结构边界的磨损。