轴压加筋壁板承载能力计算方法探讨

目前飞机设计中主要采用工程方法计算加筋壁板的承载能力。本文介绍并评述了分段处理法、John-son法和极限载荷法三种常用的工程方法，为了探讨哪种方法能更加满足工程需要，采用这三种方法对某型飞机中央翼加筋壁板及其试验件分别进行计算，表明其中极限载荷法的计算结果偏于安全，与试验结果吻合较好，并采用此法确定了中央翼加筋壁板的承载能力。最后采用极限载荷法进一步计算该型飞机机身11种构型加筋壁板轴压试验件，破坏载荷计算值与试验结果相当吻合，从而证实了极限载荷法是一种计算轴压加筋壁板承载能力更准确、实用的工程方法。

Investigation of the Computing Methods to Calculate Load-carrying Capacity of Stiffened Panels under Compression

Currently, engineering method is usually used to compute the load-carrying capacity of the panels in a design process. In this paper, three major engineering methods are briefly described and investigated. These methods are evaluated through the comparison of calculated results and test data, for the stiffed panels of the central wing and fuselage of an aircraft. It is shown that the results from ultimate load method are safer and more consistent with the experimental data. The reasonable allowable stress for central wing of the aircraft is specified according to the previous comparisons and analysis. Finally, eleven types of stiffened panels under axial compression of the aircraft fuselage are calculated by using ultimate load method. The results agree well with the experimental data. It is approved that this method can meet the requirement more accurately and utility in engineering design.