一种离散杆战斗部威胁下的飞机损伤计算模型

A Calculation Model of Aircraft Damage Caused by Discrete Rod Warhead

该文建立了一种基于修理的飞机战斗损伤计算仿真模型:根据飞机战伤修理特点及飞机战斗生存力设计分析方法将飞机零部件进行分类,针对不同属性,综合采用等效结构舱段或真实结构单一零件的方法进行几何造型;忽略杆条飞行过程中的姿态变化,采用蒙特卡洛法模拟离散杆与飞机交汇瞬间的姿态;将杆条离散成小单元,利用射击迹线仿真技术建立离散杆战斗部破片场仿真模型;利用包围盒技术在大地坐标系中进行杆条与飞机的交点求解;利用修正的THOR公式进行极限速度、剩余速度、剩余质量的求解;利用修正的公式进行切口长度的求解。

An emulation model for aircraft battle damage calculation based on repair is set up. According to the requirement of aircraft battle damage repair and combat survivability design, the components of aircraft are classified, and then equivalent cabin model or actual structure model are established differently to suit the property of components. On the basis of Monte Carlo method, ignoring the stance change of the rod during its flying ,the stances when the rods meet aircraft are simulated. The rods are dispersed into small units. By means of the shot - line technology, a discrete rod warhead fragment field model is established. The points of intersection between rods and aircraft are calculated with envelope box technology. The limit velocity, residual velocity and residual mass can be obtained from modined THOR equation. The length of cut can be forecasted by modified formula.