基于ABAQUS/FE-SAFE的机翼结构多轴疲劳分析

以CAE技术为基础对机翼结构进行多轴疲劳分析。为了能够准确预测机翼结构的疲劳寿命,采用流体力学分析与有限元分析相结合的方法,使用流体力学分析软件FLUENT对机翼飞行外载荷特性进行了分析,在有限元分析软件ABAQUS中进行了机翼结构静力学分析,并基于Brown-Miller多轴疲劳理论,利用FE-SAFE软件进行机翼结构多轴疲劳分析,得到了机翼结构的疲劳寿命情况以及疲劳薄弱位置。分析结果与实际情况对比表明,该方法可有效预测机翼结构疲劳寿命,为机翼结构疲劳分析提供新途径,为机翼设计时估算机翼使用寿命提供参考。

Multiaxial Fatigue Analysis of Wing Structure Based on ABAQUS/FE-SAFE

The multiaxial fatigue analysis of the wing structure is investigated based on CAE technology in this paper. In order to forecast the fatigue life of the wing structure accurately, the analysis of flying wing external load characteristic is carried out by FLUENT with the method of the combination of fluid mechanics and finite element analysis. The static of the wing structure is analyzed with the finite element software ABAQUS, the multiaxial fatigue of the wing structure based on the theory of Brown-Miller multiaxial fatigue is also analyzed by FE-SAFE. The fatigue life and weak position of the wing is obtained. In contrast with actual situation, the results indicate that this method can predict the fatigue life of the wing structure effectively, which provides a new way for the analysis of the wing structure, and reference for estimating the fatigue life of the wing when designing the airfoil.