“露露”易拉罐是一种薄壁圆筒,但由于存在纵向连接缝,破坏了结构的轴对称性。利用有限元法对有纵向连接缝的圆筒进行了特征值屈曲分析,计算结果与实验值能较好地吻合。对有、无纵向连接缝圆筒临界压力的有限元计算结果进行了比较,发现当主要考虑筒体的侧向失稳时,该连接缝对其失稳性能影响很小,可用做外压圆筒稳定性实验的试件。 “Lulu ” cans is a thin-walled cylinder, but due to the existence of longitudinal joints, undermining the structure of the axial symmetry. The eigenvalue buckling analysis of the cylinder with longitudinal joints is carried out by using the finite element method. The calculated results agree well with the experimental values. The results of finite element analysis of the critical pressures with and without longitudinal joints were compared and it was found that the joints had little effect on the instability when considering the lateral buckling of the cylinder. Tube stability test specimens.