The influences of span are studied in the local or global design and calculation for submarine press shell (the structures in normal or abnormal state),and the role and physical property of span are explained.

• 本文着重地讨论了潜艇耐压船体结构(包括一般状态下的结构和处于异常状态下的结构)；在局部或总体设计计算中；跨距对其应力强度及稳定性的影响.；论述了跨距在耐压船体结构设计计算中所起的作用及物理意义