飞机结构型材压损应力的工程分析方法探讨

介绍了角元法、切割法和板元法三种飞机结构型材压损的计算方法。采用切割法和板元法对某型飞机机身长桁压损试验件进行了计算,结果表明切割法和板元法均为偏保守的计算方法,切割法偏保守4%以上,板元法偏保守11%以上。切割法的计算结果更接近试验结果,为提高机体结构效率,减轻结构重量,建议采用切割法进行工程计算。

Study of the Computing Methods to Calculate Crippling Stress for Aircraft Structure Shapes

In this paper, three major engineering methods to calculate the crippling stress of column are descried and investigated: the angle method, the Gerard method, and the plate segment method. The Gerard method and the plate segment method are employed to calculate the crippling stress of fuselage stringers, the result shows that the two methods are all conservative, the conservation of Gerard method are above 4%, the conservation of plate segment method are above 11%.The result of Gerard method are more accuracy. To improve the structural effective and reduce the structural gravity, the Gerard method are suggested.