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对均布温度荷载作用下,复合材料层合板的热屈曲荷载最优化设计采用的改进可行方向法进行研究。目标函数可使层合板临界温度最大化,将纤维方向设为设计变量,数学公式中采用了一阶剪切变形理论。为此,采用一个基于FORTRAN的计算机程序来进行层合板的优化。最后,分析了长宽比、反对称铺层、边界条件、材料各向异性、热膨胀比例系数和复合层合板对研究结果的影响,并将结果进行对比。
Under the condition of uniform temperature load, the improved feasible design of the thermal buckling load of composite laminates was investigated by using the improved feasible direction method. The objective function can maximize the critical temperature of the laminate, set the fiber direction as the design variable, and use the first-order shear deformation theory in the mathematical formula. For this purpose, a FORTRAN-based computer program was used to optimize the laminates. Finally, the effects of aspect ratio, antisymmetric layering, boundary conditions, material anisotropy, coefficient of thermal expansion ratio, and composite laminates on the results of the study are analyzed and the results are compared.