破片侵彻下柴油机毁伤概率计算方法  

Calculation method of damage probability of diesel engine under fragment penetration

作　　者：丁铭 刘永寿[1] 翟红波[2] 张明媚 DING Ming;LIU Yongshou;ZHAI Hongbo;ZHANG Mingmei(School of Mechanics Civil Engineering and Architecture,Northwestern Polytechnical University,Xi’an 710129,China;Xi’an Modern Chemistry Research Institute,Xi’an 710065,China)

机构地区：[1]西北工业大学力学与土木建筑学院,西安710129 [2]西安近代化学研究所,西安710065

出　　处：《兵器装备工程学报》2023年第11期145-155,共11页Journal of Ordnance Equipment Engineering

基　　金：陕西省创新基金项目(SYJJ200320)。

摘　　要：柴油机作为作战车辆的动力核心,为作战车辆提供动力,在作战环境中是避免遭受破片打击的重要保护对象。破片对柴油机的主要结构毁伤为侵彻,将柴油机作为研究对象,总结了一整套破片侵彻下的毁伤概率计算方法。将柴油机部件简化为等效靶,采用数值仿真、理论推导、实验对比相结合的方式建立等效靶的极限穿透速度公式。基于射线与平面交点计算完成破片与柴油机交汇问题的求解,将穿透作为柴油机结构破片侵彻失效模式,采用Monte Carlo法计算柴油机部件以及整体在破片侵彻下的毁伤概率,提出基于Kriging代理模型的毁伤概率计算方法,为了验证Kriging代理模型计算结果的精确性,将计算结果与Monte Carlo进行对比,结果表明,Kriging代理模型在计算柴油机破片侵彻毁伤概率时具有更高的计算效率和相同的计算精度。Diesel engines,as the power core of combat vehicles,provide power to combat vehicles and are an important protection against fragmentation in combat environments.The main structural damage to diesel engines from fragmentation is penetration,and a set of methods for calculating the probability of damage under fragmentation penetration are summarized by taking diesel engines as the research object.The diesel engine component is simplified into an equivalent target,and the ultimate penetration speed formula of the equivalent target is established by combining numerical simulation,theoretical derivation and experimental comparison.Based on the calculation of the intersection of rays and planes,the solution of the intersection problem between the fragment and the diesel engine is completed,and the penetration is taken as the fragment penetration failure mode of the diesel engine structure,and the Monte Carlo method is used to calculate the damage probability of the diesel engine components and the whole under the fragment penetration.In order to verify the accuracy of the Kriging proxy model,the results are compared with Monte Carlo,and the results show that the Kriging proxy model has higher computational efficiency and the same computational accuracy in calculating the probability of damage of diesel engine fragmentation penetration.

关 键 词：破片 侵彻 毁伤概率 极限穿透速度 Monte Carlo法 Kriging代理模型 

分 类 号：TJ811.92[兵器科学与技术—武器系统与运用工程]