摘要
基于有限单元法中计算结点应力的绕点平均法的思想,提出了差分网格角点位移平均的方法,将包含网格角点的周围铸件网格中心处的位移值进行平均,得到网格角点上的位移值,然后就可以方便地使用OpenGL图形显示函数库将铸件的整体变形情况显示出来。实际算例证明,这种方法显示出来的铸件整体变形趋势与试验结果相符,对铸件变形等相关研究与应用具有实用价值和指导意义。
Based on the notion of nodal average stress method in FEM, a method of calculating nodal average displacement in FDM is proposed. This method calculates each average displacement on grid comer point from those on the centers of the casting grids around the comer, and then the deformation of casting can be displayed. Practical example shows that the casting deformation by the proposed method accords with the real observation in the experiment. The presented method can instruct practical experiments with some practical significance.
出处
《铸造》
CAS
CSCD
北大核心
2012年第10期1142-1145,共4页
Foundry
基金
教育部新世纪优秀人才支持计划(NCET-09-0396)
国家数控重大专项(2012ZX04010-031
2011ZX04014-052
2012ZX04012-011)
湖北省自然科学基金(2011CDB279)
湖北自然科学基金创新群体项目(2010CDA067)
关键词
有限差分法
铸造热应力模拟
铸件变形显示
finite difference method
casting thermal stress simulation
display of casting deformation
