多脉冲加载下结构装药非线性放大效应及其点火实验  

Nonlinear Amplification Effect and Ignition Experiments of Confined Charges under Multiple Impacts Loading

作　　者：仲苏洋 廖深飞 胡秋实[1] 李涛[1] 傅华[1] ZHONG Su-yang;LIAO Shen-fei;HU Qiu-shi;LI Tao;FU Hua(Institute of Fluid Physics,CAEP,Mianyang 621900,China)

机构地区：[1]中国工程物理研究院流体物理研究所,四川绵阳621900

出　　处：《含能材料》2024年第12期1343-1351,共9页Chinese Journal of Energetic Materials

摘　　要：为认识侵彻多层靶过程中装药意外点火的潜在机理,提出了基于多层嵌套子弹及双向限位设计思路,建立了一种连续多次冲击加载下结构装药非线性放大效应实验方法,验证了该方法的有效性,分析了非线性响应放大的内在机制,开展了多脉冲加载下结构非线性响应对装药点火行为的影响研究。结果表明:该实验方法能够针对装药进行灵活可控的多脉冲加载,加载应力峰值达百兆帕量级、脉宽达亚毫秒量级。一旦加载载荷的特征频率接近结构装药的固有频率,将产生结构非线性放大效应,装药应力幅值逐渐放大。在子弹速度、质量均相同的前提下,仅改变载荷频率,如果结构非线性响应发生放大,则PBX‐3装药可能发生点火;反之则不会发生点火。可见,结构非线性放大效应是导致装药点火的一个重要因素。In order to study the potential mechanism of unexpected ignition of confined charge in the process of penetrating multi-layer target,by integrating the designs of multi-layer nested strikers and bidirectional limited structure,a nonlinear amplification experimental method of confined charges under continuous multiple impacts loading was established.The effectiveness of the experimental method,and the intrinsic mechanism of nonlinear response amplification were analyzed.The influence of nonlinear response of charges under multiple impacts loading on ignition behaviors was studied.The results show that the experimental method can implement multiple impacts loading with sub-millisecond pulse width,and 100 MPa-scale peak stress value.When the characterized frequency of loading is close to the intrinsic frequency of confined charges,structural nonlinear response amplification emerges,and the stress amplitude increases gradually.For the same striker velocity and mass,while varying frequency of loading,the PBX-3 charges could be ignited if structural nonlinear response is amplified and could not be ignited if structural nonlinear response is not amplified.It is found that the structural nonlinear response amplification effect is an im-portant factor leading to charge ignition.

关 键 词：结构装药 多脉冲 非线性放大 点火 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术]