纵骨对环肋圆柱壳肋间壳板稳定性的影响

摘要

肋间壳板失稳是潜艇耐压壳体失稳的重要形式之一,加设纵骨是提高环肋圆柱壳肋间壳板稳定性的有效方法.通过理论计算,得出以下结论:加设纵骨可以提高环肋圆柱壳肋间壳板稳定性,且α值越大,效果越明显;加设纵骨后的环肋圆柱壳在肋间壳板失稳时,纵向失稳半波数等于l,周向失稳波数大于10,且纵骨尺寸越大,周向失稳波数越大;失稳临界压力随肋距的减小而增大,随纵骨尺寸的增加而增大.%Losing stability of shell between ribs is one of important form for submarine pressure hull.To improve the stability of shell between ribs for cylindrical shell,adding longitudials is a effective way.The following conclusion is gotten by theoretical calculation.Adding longitudinals improves the stability of shell between ribs for the ring-stiffened cylindrical shell whose longitudinal losing stability semi-wave number is equal 1,and circular losing stability wave number is more than 10.,the more value of α,the more obvious effect.Circular losing stability wave number increases with increasing longitudinals size,and losing stability critical pressure increases with decreasing of rib distance and increasing longitudinals size.