Simultaneously all the main parameters are determined according to the environment of fuselage airproof main frame and the design requirements in analyzing the rigidity and strength.
根据承力密封框的使用环境和设计要求，确定了对其进行刚度和强度分析时所需的各种主要参数；
2
The wings are braced by dual steel wing struts, and are bolted to the fuselage at the cabin frame with four bolts for easy wing attachment and removal.
翅膀是支撑钢翼双支柱，并固定在去除附着在机身和机翼的客舱与四架螺栓容易。
3
The method of optimization theory based on dual method was transplanted to design fuselage main frame, and the optimizing model of fuselage main frame was established.