摘要
为获取侵爆战斗部终点弹道参数对桥梁以及桥面目标损伤效应的影响规律,建立战斗部侵彻桥梁并起爆的整个过程非线性动力学仿真模型,分析不同侵彻速度与不同引爆延时下桥梁产生的裂纹、结构失效分布以及桥面冲击波的传播规律。研究结果表明:基于桥梁失效分布计算了桥梁损伤后的抗弯能力,侵彻速度为800 m/s时采取1.95~2.95 ms的延时引爆可以使箱梁抗弯能力达到最低;延时14.95 ms引爆可以使最大长度的桥墩混凝土崩落,承载能力最低。基于冲击波超压对目标的损伤判据,侵彻速度为800 m/s时采取0.95 ms左右的延时引爆可以在爆心半径3 m范围内重伤或致死桥面人员,装甲车辆受到轻度或中等破坏。研究成果可为侵爆战斗部侵彻速度及引爆时间合理设置,为增大桥梁损伤程度提供参考。
In order to obtain the law of influence of terminal ballistic parameters of penetrating explosive warhead on the damage effect of bridge and deck target,a nonlinear dynamic simulation model of the whole process of warhead penetration and detonation of bridge is established,and the crack,structural failure distribution and the propagation law of bridge deck shock wave are analyzed under different penetration velocity and different detonation delay.The results show that the flexural capacity of the damaged bridge is calculated based on the failure distribution of the bridge.When the penetration speed is 800 m/s,the delayed detonation of 1.95 ms to 2.95 ms can minimize the flexural capacity of the box girder.The detonation time delay of 14.95 ms can make the maximum length of concrete pier collapse with the lowest bearing capacity.Based on the damage criterion of shock wave overpressure to the target,when the penetration speed is 800 m/s,the delayed detonation of about 0.95 ms can seriously injure or kill the personnel on the bridge deck within 3 m radius of detonation,and the armored vehicle is slightly or moderately damaged.The research results can provide a reference for the reasonable setting of penetration speed and detonation time of the invading warhead and for increasing the damage degree of the bridge.
作者
徐可迪
曹红松
刘鹏飞
李超旺
XU Kedi;CAO Hongsong;LIU Pengfei;LI Chaowang(School of Mechanical and Electrical Engineering,North University of China,Taiyuan 030051,China;Shijiazhuang Campus of Army Engineering University,Shijiazhuang 050051,China)
出处
《兵器装备工程学报》
CAS
CSCD
北大核心
2023年第11期13-22,共10页
Journal of Ordnance Equipment Engineering
关键词
侵爆战斗部
桥梁目标
数值仿真
毁伤评估
penetrating explosive warhead
bridge target
numerical simulation
damage assessment
