基于参数化有限元方法的机翼重量预测

摘要

为飞机总体设计阶段提供一种快速而较精确的机翼重量预测方法。该方法是将参数化几何建模和参数化有限元建模方法相结合，快速地建立机翼结构有限元模型。通过应用CATIA二次开发技术，实现机翼结构布置模型的自动生成；通过运用PATRAN的PCL语言，实现结构有限元模型的自动生成；通过应用优化方法，确定出结构尺寸，进而计算出机翼重量。算例表明，本方法可快速地分析不同结构布置方案和不同材料方案的机翼重量，适用于飞机总体方案设计阶段机翼重量计算。%The purpose of this paper is to propose a rapid and more accurate method of wing mass estimation for aircraft preliminary design. The wing structure finite element models can be rapidly generated with the method that combined both geometry parametric method and parametric finite element method for the wing structures. The wing structure layout model can be automatically generated by the script of CATIA. Its finite element model can be auto-matically generated by PCL of PATRAN. The structure size and the mass of wing box structure are computed by op-timized method. The examples show that the method can rapidly analyzed the wing mass for different structural lay-outs and different materials, which is suitable for aircraft preliminary design.