民用飞机后压力框破裂对液压系统的危害分析

Hazard Analysis of Civil Aircraft Rear Pressure Bulkhead Burst to Hydraulic System

为了防止民用飞机后压力框破裂时,增压客舱内的高压气体对后机身液压系统造成损坏,建立了后压力框破裂所产生的冲击波模型,分析了冲击波对液压系统管路的危害,提出两种方法减缓后压力框破裂对液压系统的损害,一是通过选择合适材料、调节管路孔径、合理布局管路、设计结构防护等方法以提高单套液压系统管路抵抗冲击波超压的能力,二是设计冗余系统隔离以避免全部液压系统失效,为民用飞机液压系统的设计和安装提供理论依据。

In case of rear pressure bulkhead burst, hydraulic system located in the rear fuselage may be damaged due to the high pressure gas in the pressurized cabin. To avoid this hazard, set up the shock wave model resulting from rear pressure bulkhead burst, analyzed the shock wave hazard to hydraulic system tubes, and proposed two methods to reduce the damage to hydraulic system, on one hand, attempts were made to improve single hydraulic system＇s ability against the hazard by selecting appropriate tube material, optimizing suitable section size, reasonable layout and designing protective structure, on the other hand, isolation design of redundant system was used to avoid the failure of all the hydraulic systems, provides the theoretic foundation for the design and installation of civil aircraft hydraulic system.