In this paper, an analytical model is developed to investigate the buckling analysis of the composite sandwich conical shell with variable skin thickness under lateral pressure loading. This problem involves composite shells, which are produced during the filament-winding process, where the skin thickness varies through the length of the shell. An effective smeared method is employed to reduce the reinforced lattice core into a layer. This is done by analyzing forces and moments on a unit cell. Therefore, equivalent stiffness parameters of reinforced lattice core are determined. By superimposing stiffness parameters due to the lattice core with those of the inner and outer skins, the equivalent stiffness of the sandwich panel will be obtained. Governing equations are established based on the first shear deformation theory. The power series method is used to extract the buckling load of the stiffened shell. To verify achieved results, a 3D finite element model is provided. Comparisons showed that the analytical solution is qualified enough to study the buckling behavior of the composite sandwich conical shell. Through this study, the effects of a set of important parameters like stiffener orientation angle, number of stiffeners, semi-vertex angle, and skin lamination are investigated.

在本文中，建立了一个分析模型来研究具有可变蒙皮厚度的复合夹层锥壳在侧向压力载荷下的屈曲分析。这个问题涉及复合材料外壳，它是在长丝缠绕过程中产生的，其中表皮厚度随着外壳的长度而变化。采用有效的涂抹法将增强的晶格芯减少为一层。这是通过分析单元格上的力和力矩来完成的。因此，确定了加筋格芯的等效刚度参数。通过将格芯的刚度参数与内外蒙皮的刚度参数叠加，将获得夹芯板的等效刚度。基于第一剪切变形理论建立控制方程。采用幂级数法提取加筋壳的屈曲载荷。为了验证所取得的结果，提供了一个 3D 有限元模型。比较表明，该解析解足以研究复合夹层锥壳的屈曲行为。通过这项研究，研究了一组重要参数的影响，如加强筋取向角、加强筋数量、半顶角和蒙皮层压。