作 者: ;
机构地区: 广东水利电力职业技术学院水利工程系
出 处: 《计算机工程与设计》 2004年第5期844-845,848,共3页
摘 要: 应力云图是形象地理解有限元分析中应力分布的有效手段,提出了四结点单元应为云图的一种生成方法,推导出了四结点四边形单元内任一点的局部坐标的解析表达式,可直接求解单元内任一点的局部坐标。用扫描线法生成单元应力云图时,用一次Bezier曲线描述四边形单元的边,可减少交点的个数。实例表明,该方法是有效的。 Stress nephogram is an effective tool to understand stress distribution in FEA visually.A method for forming stress nephogram of four-node elements was presented.Analytic expressions of local coordinates of any point in a four-node quadrilateral element were derived,and local coordinates of any point in an element could be obtained directly.When stress nephogram was formed using scan line algorithm,simple Bezier curves would be used to describe laterals of elements to reduce points of inter- section.The solution to an example shows the validity and efficiency of the method.
关 键 词: 四结点单元 应力云图 有限元 坐标 解析表达式 扫描线法
领 域: [自动化与计算机技术] [自动化与计算机技术]