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本文提出了一种飞机易损性计算中的射击线几何描述方法。首先,将给定打击方向上的飞机暴露面积划分为三个子区域:非易损区域、非重叠易损区域和重叠易损区域。然后,把飞机的独立存在状态划分为三类:杀伤状态、中间状态和非杀伤状态,利用射击线扫描法,对以上三个子区域中的飞机存在状态参数进行分析。最后,该方法提供两类射击线几何描述数据:(1)每个子区域内部件的易损面积和暴露面积,这些数据主要用于计算部件的单击中易损性;(2)飞机的独立存在状态及各个状态对应的面积,这些数据主要用于计算飞机的单/多击中易损性。算例分析表明,所提出的方法通过跟踪射击线运动路径,可以提供飞机及部件被威胁命中部分的面积参数,从而使易损性计算更具有真实性。同时,该方法解决了目前方法在考虑部件重叠时的通用性问题,所提供的几何描述数据形式简单,易于分析人员使用。
In this paper, we present a method for describing the shooting line geometry in aircraft vulnerability calculation. First, the plane exposure area in a given strike direction is divided into three sub-regions: non-vulnerable region, non-overlapping vulnerable region and overlapping vulnerable region. Then, the state of independent existence of the aircraft is divided into three categories: the killing state, the intermediate state and the non-killing state, and the shooting line scanning method is used to analyze the existing state parameters of the aircraft in the above three sub-regions. Finally, the method provides two types of firing line geometric description data: (1) the vulnerable area and the exposed area of the components in each sub-area, which are mainly used to calculate the click vulnerability of the component; (2) the independence of the aircraft The existence of the state and the corresponding state of the area, these data are mainly used to calculate the single / multi-hit aircraft vulnerability. The case study shows that the method proposed in this paper can provide the area parameters of the threatened parts of the aircraft and components by tracking the movement path of the firing line so as to make the calculation of the vulnerability more realistic. At the same time, this method solves the problem of commonality in the current method when considering component overlap, and the provided geometric description data is simple in form and easy for analysts to use.