During the industrial design process, a product is usually modified and analyzed repeatedly until reaching the final design. Modifying the model and regenerating a mesh for every update during this process is very time consuming. To improve efficiency, it is necessary to circumvent the computer-aided design modeling stage when possible and directly modify the meshes to save valuable time. The purpose of this paper is to develop a method for mesh modifications.,In contrast to existing studies, which focus on one or a class of modifications, this paper comprehensively studies mesh union, mesh gluing, mesh cutting and mesh partitioning. To improve the efficiency of the method, the paper presents a fast and effective surface mesh remeshing algorithm based on a ball-packing method and controls the remeshing regions with a size field.,Examples and results show that the proposed mesh modification method is efficient and effective. The proposed method can be also applied to meshes with different material properties, which is very different with previous work that is only suitable for the meshes with same material property.,This paper proposes an efficient and comprehensive tetrahedral mesh modification method, through which engineers can directly modify meshes instead of models and save time.

中文翻译：

---

四面体网格的直接修改

在工业设计过程中，产品通常会反复修改和分析，直到达到最终设计。在此过程中修改模型并为每次更新重新生成网格非常耗时。为了提高效率，有必要尽可能绕过计算机辅助设计建模阶段，直接修改网格以节省宝贵的时间。本文的目的是开发一种网格修改方法。与现有的研究侧重于一个或一类修改不同，本文综合研究了网格并集、网格粘合、网格切割和网格划分。为提高该方法的效率，本文提出了一种基于球填充法的快速有效的表面网格重新划分算法，并以尺寸场控制重新划分区域。实例和结果表明，所提出的网格修改方法是有效的。所提出的方法也可以应用于不同材料属性的网格，这与之前的工作只适用于具有相同材料属性的网格有很大不同。本文提出了一种高效、全面的四面体网格修改方法，工程师可以通过它直接修改网格而不是模型并节省时间。