The free flexural vibration of thin-walled honeycomb sandwich cylindrical shell was investigated by experiments and Flügge's shell theory simulations. The natural frequencies were measured and compared with simulations three-dimensional model. In the simulation analysis, the porous honeycomb core is simplified as a homogeneous orthotropic material, and its equivalent material properties are determined by the corrected Gibson's formula. Flügge's shell theory is compared with experimental results and finite element method calculation results, and the maximum relative error is only 4.749%.The comparison results show that Flügge's shell theory can accurately calculate the natural frequency of the thin honeycomb sandwich cylindrical shell.

通过实验和Flügge的壳理论模拟研究了薄壁蜂窝夹心圆柱壳的自由挠曲振动。测量了固有频率，并将其与模拟三维模型进行比较。在模拟分析中，多孔蜂窝芯简化为均质的正交各向异性材料，其等效材料特性由修正的吉布森公式确定。将弗吕格的壳理论与实验结果和有限元方法的计算结果进行比较，最大相对误差仅为4.749％。比较结果表明，弗吕格的壳理论可以准确地计算出蜂窝薄夹层圆柱壳的固有频率。