一种机翼弯剪载荷包线近似计算方法

在机翼静强度初步设计中，为了快速准确地得到其载荷包线并用于确定翼盒结构基本参数，提出一种近似计算方法。通过比较多种重量估算方法，发现三角形分布能较好地拟合机翼重量。考虑到大型民用运输机飞行临界过载和集中载荷等特性，综合利用Schrenk升力分布和三角形重量分布，得到在飞行载荷下的一种近似计算机翼剪力和弯矩载荷包线方法。通过分析两机翼风洞试验数据得到的机翼剪力和弯矩包线，证明该近似方法是可行的。

Approximation Method for Calculating the Wing Load Envelope of Bending Moment and Shear Force

In this paper, an approximation method is presented for calculating the wing load envelope and using to size the wing box in wing strength primary design phase. It is found that the triangle weight load distribution is better than other distributions in simulating the wing weight. Furthermore, this paper investigates the characters of critical over loading and centralized loads for large civil aircrafts. An approximation method for calculating the wing load envelope of bending moment and shear force in flight is proposed by combining the Schrenk lift distribution and triangle weight distribution. Then, the proposed method is validated by wind tunnel data of wing shear forces and bending moments.