数据与计算发展前沿 ›› 2025, Vol. 7 ›› Issue (3): 174-184.

CSTR: 32002.14.jfdc.CN10-1649/TP.2025.03.014

doi: 10.11871/jfdc.issn.2096-742X.2025.03.014

• 技术与应用 • 上一篇    下一篇

面向非规则体离散的高效物质点生成技术研究

崔潇骁1,*(),赵玉立1,修涵文2,薛晓光1,黄咏政1,何晓辉3,朱江3   

  1. 1.中国人民解放军63921部队，北京 100094
    2.中国科学院计算机网络信息中心，北京 100083
    3.北京中科浩晖科技股份有限公司，北京 100190
  • 收稿日期:2023-12-29 出版日期:2025-06-20 发布日期:2025-06-25
  • 通讯作者: *崔潇骁（E-mail: cuixiaoxiao1986@163.com）
  • 作者简介:崔潇骁，中国人民解放军63921部队，助理研究员，长期从事计算动力学研究和相关软件系统开发，主要研究方向为物质点法及其耦合算法。
    负责论文初稿撰写与物质点生成算法开发。
    CUI Xiaoxiao is an assistant researcher at 63921 unit of the Chinese People's Liberation Army. He has been engaged in computational dynamics research and the development of relevant software systems for a long time. His main research interests include the material point method and its coupling algorithms.
    In this paper, he is responsible for drafting the manuscript and developing the material point generation algorithm.
    E-mail: cuixiaoxiao1986@163.com

Research on the High-Efficiency Generation Technology of Material Points for the Discretization of Irregular Bodies

CUI Xiaoxiao1,*(),ZHAO Yuli1,XIU Hanwen2,XUE Xiaoguang1,HUANG Yongzheng1,HE Xiaohui3,ZHU Jiang3   

  1. 1.63921 unit of the Chinese People’s Liberation Army, Beijing 100094, China
    2. Computer Network Information Center, Chinese Academy of Science, Beijing 100083, China
    3. Beijing Sinohowe Technology Co.Ltd., Beijing 100190, China
  • Received:2023-12-29 Online:2025-06-20 Published:2025-06-25

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摘要：

【目的】针对物质点无网格数值模拟方法中非规则体模型的离散难题。【方法】本文通过复杂三维几何模型的四面体单元划分和单元自动转化物质点算法，设计和实现了一个功能可行且易于使用的物质点生成方法。【结果】该方法可支持4种格式的外部模型解析和网格划分，并形成了物质点自动生成系统，该系统在用户层提供了命令行小工具和通用浏览器2种交互方式。采用该系统进行了多个非规则体离散实验，实验结果显示生成的物质点可以准确反应模型的质量分布，空间分布等特性。【局限】但是相比于规则体，对于非规则体的离散产生的物质点的均匀性还有待提高。【结论】该方法可为复杂三维实体模型的物质点生成提供高效工具手段。

关键词: 物质点法, 非规则体, 网格划分, 图形可视化, 质点离散

Abstract:

[Objective] This paper focuses on the discretization challenges of irregular body models within the context of the meshless numerical simulation method for material points. [Methods] A functional and user-friendly material point generation approach is designed and implemented through tetrahedral element partitioning of complex three-dimensional geometric models and an algorithm of automatic conversion of element to material point. [Results] The proposed method supports the parsing and meshing of external models in four formats and gives rise to an automatic material point generation system, which offers two interaction modalities, namely a command-line utility and a general browser, at the user level. Multiple discretization experiments on irregular bodies are conducted using this system, and the experimental results demonstrate that the generated material points can accurately reflect characteristics such as the mass distribution and spatial distribution of the model. [Limitations] Nevertheless, compared to regular bodies, the uniformity of the material points resulting from the discretization of irregular bodies still requires improvement. [Conclusions] Overall, this method serves as an efficient tool for generating material points of complex three-dimensional solid models.

Key words: material point method, irregular body, mesh generation, graphics visualization, particle discretization