changeover portion meaning in Chinese

过渡段

The numerical results show that the double arc transition form can make different cylinder shells eliminate stress concentration at two ends and amend stress distribution of changeover portion
计算结果表明：双圆弧式的过渡形式能使不同直径圆柱壳两端连接处消除应力集中和改善过渡段应力分布。
In order to approach the optimum design of changeover portion structural shapes for submarine ' s different diametral pressure cabins , a new structural type , named the double arc transition form , is introduced based on the analysis of stress concentration , by using the engineering calculation method and finite element mthod
摘要为了探讨潜艇不同直径的耐压舱室过渡段结构型式的最优设计，利用工程计算方法和有限元方法，分析过渡段结构的应力集中，提出了能够使不同直径圆柱壳光滑过渡的结构形式双圆弧式过渡形式。