肋距对环肋圆柱壳壳板稳定性的影响

为研究环肋圆柱壳壳板稳定性的有关性质，对其失稳临界压力进行曲线绘制。在潜艇耐压船体相关参数范围内，环肋圆柱壳壳板失稳时，纵向失稳半波数m=1，周向失稳整波数n〉10。壳板失稳临界压力随肋距的缩小而增大，当仅受轴向外压力时，壳板失稳临界压力不随肋距的变化而改变。根据潜艇耐压船体相关参数范围，计算环肋圆柱壳总体失稳临界压力和壳板失稳临界压力的取值范围。在设计中，应使总体失稳临界压力等于或略大于壳板失稳临界压力。

The Influence of Frame Interval on the Stability of Ring-Stiffened Cylindrical Shells

To study the characteristics of ring-stiffened cylindrical shells, the critical load diagrams of dy- namic instability have been drawn. For a typical pressure hull of submarines （within the relevant parameter range）, it is observed that when the cylindrical shell loses its stability, the value of longitudinal instability semi-wave m = 1, and the value of circular instability wave n = 10. Also, the critical load of instability in- creases when the distance between ribs is reduced. However, such phenomenon does not occur when the shell is subjected to external axial forces. Based on this observation, this paper calculates the critical load range of the overall cylinder instability and the shell instability. It is suggested that the overall instability critical load should be at least equal to or larger than that of the shell during the design process.