基于数字样机的易燃液体排液设计和验证方法

Drainage design and verification method of flammable liquid based on digital model

随着新的材料、工艺在飞机上广泛地应用,导致飞机发生火灾的可能性极大地增加。因此,防火设计是飞机的一个重点研究方向。飞机易燃液体的防火措施主要包括:隔离、通风、排液、着火探测等等。其中,排液设计是飞机防火的一种主要手段。飞机的易燃液体主要分布在内部的油箱、液压燃油管路及相关的系统设备中,这造成防火设计特征元素(点火源、易燃物等)复杂众多。而在飞机设计迭代过程中,由于需要对这些特征元素的构型进行管理与控制,采用传统的方法进行易燃液体排液设计将带来极大的工作量,亟需新方法来解决。提出了一种基于数字样机的排液方法,并剖析了数字样机建立和分析的主要思路,同时结合系统工程的技术对基于数字样机的易燃液体排液设计与验证方法进行了研究。

With the wide application of new materials and processes in aircraft,the possibility of aircraft fire is greatly increased.Therefore,fire prevention design is a key research direction of civil aircraft.Fire prevention measures for flammable liquids in aircraft include isolation,ventilation,liquid drainage,fire detection,etc.Among them,the drainage design of flammable liquid in aircraft is a main means of fire prevention design.Flammable liquid in aircraft is widely distributed in fuel tanks,hydraulic fuel pipelines and related system equipment which makes the fire protection design feature elements(ignition source,flammable object,etc)complex and numerous.During the iterations of aircraft design,due to the need to manage and control the configuration of these characteristic elements,the traditional method for the drainage design of flammable liquid will bring a lot of workload,and a new approach is urgently needed to solve it.This paper presents a liquid drainage method based on digital mock-up,and analyzes the key idea of the establishment and analysis of digital mock-up.At the same time,the drainage design and verification method of flammable liquid based on the digital mock-up was studied combined with system engineering technology.