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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
In this paper, two types of isoparametric elements are used. By means of variational method, the pressure distribution in the subcritically-defined steady-state potential flow of a three-dimensional wing is calculated. The calculation results are in good agreement with the experimental results. The local linearization theory in finite element method is also used in this paper. The element center density is interpolated to calculate the element coefficient matrix during iteration. The result is consistent with the usual finite element calculation, but the calculation time is obviously reduced. The article also describes the theory of local linear finite element method and local linear finite element method