摘要
有限元法是电场数值计算中普遍采用的一种方法,当求解域内实体较多且结构复杂时,整体模型的区域离散往往难度较大。为此,基于模型的基本几何形态,提出一种针对复杂模型电场数值分析的快速建模剖分方法。以简单2维模型为例,介绍外包区域实体生成及相互位置关系判断算法,结合有限元电场计算时的网格剖分策略,参数化实现模型表面多层网格加密,剖分的效率及质量较高。将该方法应用于特高压直流(ultra high voltage direct current,UHVDC)阀厅设备表面电场计算中,计算结果表明:该方法较子模型法计算所得结果最大误差仅为3.80%,计算效率较子模型法大幅提高。该方法实现了大型复杂模型表面网格精细化控制,对大规模有限元电场计算的快速、准确建模具有一定指导意义。
Finite element method is a commonly used method in the numerical calculation of electric field.When the number of entities in the solving domain is large and the structure is complex,the regional discretization of the whole model is often difficult.Therefore,based on the basic geometric shape of the model,a fast method of modeling and mesh generation was proposed for the numerical analysis of the electric field of the complex model.Taking a simple two-dimensional model as an example,the paper introduced the algorithm for generation and mutual positional relationship judgment of external surround entities.Combined with the mesh generation strategy of finite element electric field calculation,the multi-layer mesh density was increased by parameterization on the surface of the model,and the efficiency and quality of the mesh generation were high.The method was applied to the calculation of electric field on the surface of ultra high voltage direct current (UHVDC)valve hall equipment.The calculation results show that the maximum error of this method is only 3.80% compared with the sub-model method,and the computational efficiency is greatly improved compared with the sub-model method.This method realizes the fine mesh control of large-scale complex models, and has a guiding significance for fast and accurate modeling of large scale finite element electric field.
作者
杜志叶
田雨
金硕
朱琳
谢一鸣
王建
马志伟
阮江军
DU Zhiye;TIAN Yu;JIN Shuo;ZHU Lin;XIE Yiming;WANG Jian;MA Zhiwei;RUAN Jiangjun(School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,Hubei Province,China;Technology Training Center,State Grid Hubei Electric Power Company,Wuhan 430079,Hubei Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2018年第24期7166-7173,共8页
Proceedings of the CSEE
基金
国家自然科学基金项目(51477120,51741708)~~
关键词
有限元法
网格剖分
外包区域实体
电场计算
特高压直流阀厅
finite element method
mesh generation
external surround entities
electric field calculation
ultra high voltage direct current (UHVDC)valve hall
作者简介
杜志叶(1974),男,博士,教授,研究方向为电磁场数值计算、特高压直流输电关键技术等,Duzhiye@126.com;田雨(1995),男,硕士研究生,研究方向为电磁场数值计算,yu_tian@whu.edu.cn。
