考虑跳弹现象的飞机单击中易损性计算方法  

A New Method for Calculating Aircraft Single-Hit Vulnerability Considering Threat Ricochet

作　　者：裴扬[1] 宋笔锋[1] 韩庆[1] 

机构地区：[1]西北工业大学航空学院,陕西西安710072

出　　处：《西北工业大学学报》2007年第3期347-352,共6页Journal of Northwestern Polytechnical University

基　　金：国家自然科学基金(10372082);中国博士后基金(20060400301);西北工业大学青年科技创新基金资助

摘　　要：飞机在威胁单次打击下的易损性计算方法通常假定威胁的弹道为直线,并且忽略跳弹影响。在实际的飞机遭遇中,当威胁的入射速度满足一定条件时,跳弹现象就会发生,直线弹道假设不再成立。基于该事实,提出了一种新的飞机易损性计算方法,以考虑威胁跳弹对易损性的影响。该方法利用JTCG/M E方程来计算威胁的实际弹道及运动状态的变化,以‘射击线扫描法’来计算每一条射击线对应的易损面积,进而获得飞机在威胁单次打击下总的易损面积及杀伤概率。算例采用传统方法和所提出的方法对某飞机在26个标准攻击方向上的易损性进行了计算与对比,验证了所提出方法的有效性与可行性。分析表明:①由于考虑了跳弹现象,所提出的方法能够更加真实地对飞机易损性进行评估;②当考虑跳弹影响时,所计算的飞机易损性通常要比不考虑跳弹时有所增加,打击方向不同,增加幅度有所不同;③飞机作战生存力/易损性评估中,跳弹影响不容忽视。When computing the vulnerability of an aircraft to a single threat hit, the assumptions are usually made that the threat travels along a straight trajectory and the ricochet is ignored. In the actual encounter environment, when the threat velocity satisfies a certain condition, the ricochet will happen and the straight trajectory assumption will not be true. We propose a new method for aircraft single-hit vulnerability assessment considering the effects of threat ricochet. In this method, the JTCG/ME （Joint Technical Coordinating Group/Munitions Effectiveness） penetration equations are used to calculate the actual path and the change of state-of-motion of threat. Using ＇shotline scanning method＇, the vulnerable area corresponding to each shotline is calculated and thus the vulnerable area and kill probability of the aircraft are obtained. A calculation example is given in Table 2. In the example, comparisons are made for the vulnerability of 26 standard threat aspects using the proposed method and the commonly used method. Results show that： （1） since the ricochet is considered, the proposed method provides a more realistic and effective aircraft vulnerability assessment; （2） when the ricochet is considered, the computed aircraft vulnerability will usually increase compared with the case where the ricochet is not considered, and the increment is relative and sensitive to the threat aspect; （3） in the aircraft combat survivability or vulnerability assessment, the threat ricochet should not be ignored.

关 键 词：易损性 跳弹 杀伤概率 易损面积 作战生存力 

分 类 号：V221[航空宇航科学与技术—飞行器设计]