The article adopts theories such as stress - focus to calculate the structures stress ; the assembly stress and the product conditions are the keystones of production ; whether expediently replace glass in the field and damnify framework are considered in servicing ; the new lifesaving way the request which proposed to the cabin design mainly considers the access cabin overall rigidity 应力分析主要采用应力集中等理论对结构进行计算；生产过程主要考虑装配应力和生产条件；维护主要考虑是否利于外场更换玻璃和更换玻璃对框架的损伤；新救生方式对舱盖设计提出的要求主要考虑舱盖整体刚度。
