嵌于CAD系统的有限元建模方法及其应用  

A CAD System Embed Finite Element Modeling Method and Its Application

作　　者：吴巧云[1] 刘梓良 陈旭勇[1] 许峙峰 WU Qiaoyun;LIU Ziliang;CHEN Xuyong;XU Zhifeng(Wuhan Institute of Technology,Wuhan,Hubei 430073,China)

机构地区：[1]武汉工程大学,武汉430073

出　　处：《铁道工程学报》2024年第5期79-86,共8页Journal of Railway Engineering Society

基　　金：湖北省杰出青年基金项目(2023AFA103);国家自然科学基金项目(52078395);国家自然科学基金面上项目(52178301);湖北省首届青年拔尖人才计划项目;武汉市科技局知识创新专项曙光计划项目(2022010801020357);武汉工程大学科学研究基金项目(K2021030)。

摘　　要：研究目的:当下,多数有限元分析应用的建模功能较为薄弱,导致复杂结构体系的有限元分析既琐碎又麻烦。另一方面,虽然计算机辅助设计(CAD)应用在建模方面十分强大,由CAD应用建立的模型通常无法用作有限元分析。为此,本文提出一种嵌于CAD系统的有限元建模方法,为说明其有效性及实用性,进一步研发了一款名为DirectMesh的Rhinoceros插件并将其应用于武汉站有限元分析中。研究结论:(1)利用CAD系统所提供的交互性环境及各种建模工具可大幅提高有限元建模的效率;(2)本文所提独立网格生成单元可生成代表单个对象的网格;(3)本文所提综合网格生成单元可生成含多个对象的综合网格系统;(4)本文所提有限元模型生成器可通过网格有效生成复杂结构系统的有限元模型;(5)本文所提方法可大幅提高有限元建模的易用性及效率,有助于提高机械工程、土木工程及岩土工程中仿真模拟工作的智能化程度。Research purposes:Currently,most finite element analysis applications are relatively weak at modeling,resulting in finite element analyses of complex structural systems being trivial and troublesome.On the other hand,though computer-aided design(CAD)applications are powerful at modeling,models built in CAD applications are usually not applicable for finite element analysis.To this end,this paper proposes a CAD system embed finite element modeling method.To demonstrate its validity and practicality,a Rhinoceros plugin named DirectMesh is further developed and applied to the finite element analysis of Wuhan Station.Research conclusions:(1)Using the interactive environment and various modeling tools provided by CAD system can significantly increase the efficiency of finite element modeling.(2)The single mesh generation unit proposed in this paper can generate the mesh of a single object.(3)The comprehensive mesh generation unit proposed in this paper can generate the comprehensive mesh system of multiple objects.(4)The finite element model generator proposed in this paper can generate the valid finite element model of a complex structural system.(5)The method proposed in this paper can dramatically increase the usability and efficiency of finite element modeling,which contributes the intelligent level of simulation works in mechanical engineering,civil engineering and geo-engineering.

关 键 词：计算机辅助设计 建模 有限元 网格 复杂结构体系 

分 类 号：TP319[自动化与计算机技术—计算机软件与理论]