【摘要】 本文使用了两种类型等参元 ,通过变分法 ,计算了三维机翼亚临界定常位势流中的压力分布 ,计算结果与试验结果符合较好。文中还使用了有限元法中的局部线性化理论 ,插值出元素中心点密度去处理迭代过程中元素系数阵的计算 ,其结果与通常的有限元计算相吻合 ,但计算时间却明显减少了。文中还对有限元法局部线性化理论和局部线性化有限元法做了阐述更多还原

【Abstract】 In this paper, two types of isoparametric finite element are used to predict surface pressure distribution on the three dimensional wing which are placed in the subcritical steady flow by the variational FEM. The numerical results are compared well with the interpolated density at the central point of an element is taken to calculated the local element coefficient matrix in each iterative process. The numerical results are the same as those of ordinary FEM, but the time required for the calculation isreduced in compare with those required by the former method. In the paper, local linearization theory of FEM and local linearizatin FEM are discussed.更多还原