关于有限元模型中“化圆为方”的探讨  

Research of “Circularity Transformed to Square” in Establishing Finite Element Modeling

作　　者：徐尚龙[1] 薛河[1] 

机构地区：[1]西安科技学院机械工程学院,西安710054

出　　处：《机床与液压》2003年第2期212-213,共2页Machine Tool & Hydraulics

摘　　要：在建立有限元计算模型时常会遇到结构复杂、外形为圆弧且含裂纹的结构,如果按照节点一单元的建模方式,节点坐标很难精确给定,况且要创建裂纹尖端应力奇异单元无疑有较大的困难,本文提出一种改变对结果无影响的外形特征,同时保证重点考察的局部几何特征和物理特性的建模方法以减小建模难度,并以实际算例验证了该方法,为有限元模型简化提供了一种新途径。The finite element computation module of complex construction with arc outline and crack is often demanded. If the approach of establishing modeling is node - element means, locating node coordinates precisely and establishing singular elements around crack tip are full of difficulties. In this paper a method of establishing modeling that outline feature is modified and local geometric and physical features are maintained is brought forward to make modeling - established easy and verified by illustration, which provides a new means for simplifying finite element modeling.

关 键 词：有限元模型 化圆为方 应力 裂纹 建模 应力强度因子 数值模拟 

分 类 号：TB115[理学—数学]