一、引言在化工、石油及国防等工业部门常常遇到同时承受轴向压力和外压力作用的薄壁圆筒,例如某些真空塔。这种圆筒破坏的主要原因是由于稳定性不够。过去,因为资料不全,生产及设计部门在计算轴向压力和外压同时作用下的临界组合载荷时遇到了困难。薄壁圆筒在上述两种载荷同时作用的稳定性问题已有不少人进行过研究, I. INTRODUCTION In the chemical, oil and defense industries, it is common to encounter thin-walled cylinders that withstand both axial and external pressures, such as some vacuum towers. The main reason for this cylinder failure is due to insufficient stability. In the past, due to incomplete information, production and design departments encountered difficulties in calculating the critical combined loads under the simultaneous application of axial and external pressures. Thin-walled cylinder in the above two kinds of loads at the same time the stability of the problem has been studied by many people,