复合材料加筋壁板压缩稳定性工程算法验证研究

Research on Engineering Calculation Verification of Compression Buckling of Composite Stiffened Panel

复合材料加筋壁板的主要失效模式是丧失稳定性,为确保其结构安全同时有效降低结构重量,有必要对其稳定性校核时的边界条件和蒙皮受载边宽度选取进行系统的研究。通过对两种边界条件、三种蒙皮受载边宽度选取进行研究,提出考虑长桁影响的蒙皮受载边宽度选取方法,进行加筋壁板稳定性计算,将计算结果与试验结果进行验证。结果表明:边界条件选取四边简支,蒙皮受载边宽度选取考虑长桁影响的工程稳定性计算方法准确度最高,计算结果与试验结果最小偏差0.29%,最大偏差7.16%,且全部低于试验值;该方法用于结构强度稳定性校核是安全可靠的。

The main failure mode of composite stiffened panel is buckling.In order to ensure the safety of the structure and effectively reduce the weight of the structure,it is necessary to systematically study the boundary conditions and the width of the load-bearing edge of the skin when checking the buckling.Through the study of two kinds of boundary conditions and three kinds of skin load edge width selection,a method of skin load edge width selection considering the influence of stringer is put forward to calculate the buckling of stiffened panel and verify with the test results.The research results show that the engineering buckling calculation method with the boundary conditions of four sides simply supported and the width of the loading edge of the skin considering the influence of the stringer has the highest accuracy,the minimum deviation between the calculation results and the test results is 0.29%,the maximum deviation is 7.16%,and all of them are lower than the test values.It is safe and reliable to use this method to check the strength and stability of structures.