摘要
基于水下爆炸理论,采用耦合欧拉-拉格朗日(CEL)方法,建立了CL-20基含铝炸药水下爆炸模型,分析了冲击波载荷和气泡动力学特性;在此基础上探究了双发CL-20基含铝装药水下爆炸冲击波时空分布规律及气泡融合特性,讨论了不完整刚性边界附近双发CL-20基含铝装药水下爆炸气泡动力学特性,得到了装药种类、破口尺寸和爆距3种关键因素对双发装药水下爆炸气泡载荷特性的影响。结果表明,与TNT装药相比,CL-20基含铝装药水下爆炸气泡半径和脉动周期更大,气泡最大半径增大了27%,脉动周期提高了65%,但气泡脉动压力小于TNT。双发CL-20基含铝装药在水平和垂直位置具有特征尖锐波峰-波谷载荷曲线和特征双峰曲线,冲击波峰值压力大于单发装药,最大增长率可达48.26%。不完整刚性边界破口尺寸、爆距增大会增加双发装药气泡射流宽度和持续时间,CL-20会加剧不完整边界对气泡动力学的影响。
The coupled Eulerian-Lagrangian(CEL)method was used based on theory of underwater explosion(UNDEX)to investigate the UNDEX shock wave load and bubble dynamics of CL-20-based aluminized containing explosives.On this basis,UNDEX shock wave spatial and temporal distribution law and bubble fusion characteristics of the double shot CL-20-based aluminized charge were explored.The dynamics of UNDEX bubbles for double-shot CL-20-based aluminized containing charges near incomplete rigid boundaries were discussed.The effects of three key factors,namely,charge type,breach size and detonation distance,on loading characteristics of underwater explosive bubbles with a double charge were obtained.The results show that,compared with TNT charge,UNDEX bubble radius and pulsation period of CL-20-based aluminized charge are larger.The maximum radius of the bubble increases by 27%.The pulsation period increases by 65%.However,the bubble pulsation pressure is less than that of TNT.Double shot CL-20-based aluminized containing charges have characteristic sharp peak-valley loading curves and characteristic double peak curves in horizontal and vertical positions.The maximum growth rate is up to 48.26%.The peak shockwave pressure is greater than that of a single shot charge.The increase in breach size and detonation distance can increase the width and duration of the double shot bubble jet.The CL-20 can intensify the effect of incomplete boundaries on bubble dynamics.
作者
张竞元
李海龙
冯海云
王龙侃
张之凡
ZHANG Jing-yuan;LI Hai-long;FENG Hai-yun;WANG Long-kan;ZHANG Zhi-fan(State Key Laboratory of Structural Analysis,Optimization and CAE Software for Industrial Equipment,School of Naval Architecture Engineering,Dalian University of Technology,Dalian Liaoning 116024,China;Xi′an Modern Chemistry Research Institute,Xi′an 710065,China;China Ship Research and Development Academy,Beijing 100192,China)
出处
《火炸药学报》
EI
CAS
CSCD
北大核心
2024年第8期747-757,I0005,共12页
Chinese Journal of Explosives & Propellants
基金
国家自然科学基金(No.52271307,No.52061135107,No.52192692)
辽宁省优秀青年基金计划(No.2023JH3/10200012)
中央高校基本科研业务费专项资金(No.DUT20TD108,No.DUT20LAB308)
辽宁省兴辽英才计划高水平创新创业团队项目(No.XLYC1908027)
大连市重点领域创新研究团队项目(No.2020RT03)。
