某型民用运输机机翼应力与变形分析

Stress and Deformation Analysis of a Certain Type of Civil Aircraft Wing

为了探究大型运输机在使用限制范围内,典型载荷作用下机翼的应力分布和变形量,针对某型飞机,建立了机翼翼盒段有限元模型。对巡航状态、最大正过载和最大负过载(1 g,2.5 g,-1 g)三种典型工况进行应力和变形分析。结果显示,巡航状态机翼向上弯曲的最大变形量为1.33 m,32~33号肋区域应力较大;最大正过载时,机翼向上弯曲的最大变形量为3.69 m,应力较大区域与巡航状态类似;最大负过载情况下,机翼向下弯曲的最大变形量是1.81 m,18~19号肋区域应力较大。通过与同级别飞机试验数据的比较,验证了计算结果的准确性。分析结果可为大型飞机机翼结构设计和气动弹性分析提供参考。

In order to explore the wing＇s stress distribution and deformation in typical load within the scope of use restrictions of the large transport aircraft, the finite element model of a certain type aircraft wing box is established, on the three kinds of typical working condition, cruise state N maximum positive overload state and maximum negative overload state （1 g,2. 5 g, - 1 g） ,stress and deformation of the wing box are analyzed. Results show that the maximum wing bending deformation of the cruise state is 1. 33 m, the large stress area is 32nd to 33rd rib region ; the maximum wing bending deformation of the maximum positive overload state is 3.69 m, the large stress area is similar as the cruise state ; the maximum wing bending deformation of the maximum negative overload state is 1.81m, the large stress area is 18th to 19th rib region. Through the comparison of test data with the same level plane, the calculation is verified accurately. The results of the analysis can be provided for the large aircraft wing structure design and aerodynamic elasticity analysis.