高聚物黏结炸药模拟材料冲剪实验下的动态变形破坏研究
作者：戴开达，CHEN Ang（State Key Laboratory of Explosion Science and Technology，Beijing Institute of Technology，Beijing 100081，China；北京理工大学爆炸科学与技术国家重点实验室；State Key Laboratory of Explosion Science and Technology，Beijing Institute of Technology，Beijing 100081，Ch）
出处：第十二届全国冲击动力学学术会议2015
关键词：高聚物粘结炸药；分离式霍普金森压杆；冲剪实验；动态变形；破坏机理
摘要：采用分离式霍普金森压杆(SHPB)装置,对一种高聚物粘结炸药(PBX)模拟材料的冲剪实验进行加载.利用高速摄影装置记录材料动态变形破坏过程,结合数字散斑相关技术,对典型加载条件下的位移场和应变场进行了分析,对PBX模拟材料动态变形破坏现象和机理进行了分析.实验结果验证了DIC方法用于PBX模拟材料动态测量的可行性.
利用电子雷管精确延时控制爆破效果研究
作者：杨军，邹宗山（State Key Laboratory of Explosion Science and Technology，Beijing Institute of Technology，Beijing；北京理工大学爆炸科学与技术国家重点实验室）
出处：中国工程爆破协会成立20周年学术会议2014
关键词：电子雷管；振动控制；爆破质量；岩石破碎
摘要：本文研究高精度雷管取代普通毫秒雷管实行毫秒级精确延时逐孔起爆,及其对控制爆破振动、改善爆破质量等方面所带来的影响.采用理论研究、模型试验和工程实践研究相结合的手段,对精确延时条件下控制爆破作用进行了分析,得出合理设定毫秒延时间隔时间不仅有利于爆破振动控制,同时可改善岩石破碎效果.进一步现场工程实践表明:合理的毫秒延时间隔时间设定可以使爆破产生的地震频率宽度增加,改善频带能量的分布范围,有利于降低爆破振动效应;同时精确延时起爆方式的改变,还有利于改善爆堆形态,提高生产效率.
含能单晶微纳米力学性能试验研究
作者：王昕捷，吴艳青，HUANG Feng-lei（School of Mechatronical Engineering，Beijing Institute of Technology，Beijing 100081，China；北京理工大学爆炸科学与技术国家重点实验室；Scho）
出处：第十届全国爆炸力学学术会议2014
关键词：含能单晶；材料载荷；力学性能参数；微观破坏机理；微纳米压痕实验
摘要：本文利用微纳米压痕实验β-HMX单晶(010)晶面和α-RDX单晶(210)晶面的力学性能参数和微观破坏特征.通过微纳米压痕实验连续刚度法(CSM)得到HMX单晶和RDX单晶的弹性模量和硬度,RDX单晶的硬度和模量都大于HMX单晶,其硬度值均表现出一定的尺寸效应.利用原子力显微镜(AFM)分析了HMX单晶和RDX单晶的微观破坏机理,裂纹随着载荷的增大生成并扩展,裂纹面产生方向为晶体的最易解理破坏方向.为研究含能材料点火和起爆性能的理论研究提供支撑。
起爆同步性偏差对组合式MEFP战斗部影响的数值模拟和试验研究
作者：李元，WEN Yu-quan（State Key Laboratory of Explosion Science and Technology，Beijing Institute of Technology，Beijing 100081，China；北京理工大学爆炸科学与技术国家重点实验室；State Key Laboratory of Explosion Science and Technology，Beijing Institute of Technology，Beijing 100081）
出处：第十届全国爆炸力学学术会议2014
关键词：组合式多爆炸成型弹丸；战斗部；起爆系统；同步性偏差
摘要：以多点输出同步起爆网络用于起爆组合式MEFP战斗部为背景,通过数值模拟的方法,研究了不同起爆同步性偏差对MEFP毁伤元成型的影响,得到了最大允许起爆偏差值,为同步起爆网络的设计提供了理论指导;据此设计了"一入四出"同步起爆网络,并对其同步性偏差进行了测试,测得的同步性偏差数据和MEFP靶场试验结果表明所设计同步起爆系统能够满足使用要求,本研究可为同类型问题的解决提供理论指导.
ROC曲线在冲击载荷作用下薄膜破坏阈值判定中的应用分析
作者：王川，LI Jian-Ping（State Key Laboratory of Explosion Science and Technology，Beijing Institute of Technology，Beijing 100081，China；爆炸科学与技术国家重点实验室北京理工大学；State Key Laboratory of Explosion Science and Technology，Beijing Institute of Technology，Beijing 100081）
出处：第十届全国爆炸力学学术会议2014
关键词：爆炸冲击载荷作用；薄膜破坏现象；阈值判定；受试者工作特征曲线
摘要：爆炸冲击波的峰值超压是衡量爆炸威力的重要参数,爆炸冲击载荷作用下薄膜材料破坏与否,直接反映了峰值超压的大小,为此,判断薄膜的破坏对应的临界超压尤为重要.本文基于ROC曲线诊断二元分类模型界限值的统计分析方法,结合冲击载荷作用下准脆性薄膜材料的破坏情况的实验结果,使用SPSS软件得到一定条件下薄膜破坏的ROC曲线.该曲线对比机会线表明其具有较好的诊断价值,亦即该方法可用来判定薄膜破坏阈值.说明了ROC曲线方法在冲击动力学领域和工程上有着广泛的应用.
基于逻辑回归的烟酸粉尘云爆炸极限的研究
作者：刘庆明，LIU Li-Bin（State Key Laboratory of Explosion Science and Technology，Beijing Institute of Technology，Beijing 100081，China；北京理工大学爆炸科学与技术国家重点实验室；State Key Laboratory of Explosion Science and Technology，Beijing Institute of Technology，Beijing 100081）
出处：第十届全国爆炸力学学术会议2014
关键词：烟酸粉尘云；爆炸极限；逻辑回归；点火成功概率
摘要：粉尘云爆炸极限是描述粉尘爆炸的关键参数,为了更精确的研究粉尘云的爆炸下限,运用多种爆炸下限测试方法,在20L球型爆炸装置中测试了一定粒径的烟酸粉尘云的爆炸下限.基于Logistic回归模型,利用Spss统计软件得到烟酸粉尘云在不同浓度条件下的点火成功概率—浓度分布曲线,并分析了实验次数的不同对爆炸下限概率分布的影响规律.结果表明:点火成功概率为50％的浓度值与点火次数无关,为一个定值.但点火实验次数越多,浓度置信区间范围越窄,数据越可靠.与其他计算方法的结果相比,以概率表示烟酸粉尘爆炸下限更符合实际情况,为不同生产环境下不同的安全标准提供精确的理论数据.
装药在侵彻过程中的受力
作者：朱强，ZHENG Bo（State Key Laboratory of Explosion Science and Technology，Beijing Institute of Technology，Beijing 100081，China；北京理工大学爆炸科学与技术国家重点实验室；State Key Laboratory of Explosion Science and Technology，Beijing Institute of Technology，Beijing 100081，Ch）
出处：第十届全国爆炸力学学术会议2014
关键词：侵彻弹；弹体装药；侵彻速度；受力简化模型
摘要：本文从侵彻弹的抗高过载进行讨论,对侵彻弹装药出现断裂和装药被拔出进行初步分析.采用两枚浇注PBX装药的模拟弹,以不同的侵彻速度对两种不同强度的混凝土靶板进行侵彻实验.观察到的实验结果为:#1侵彻弹贯穿靶板,弹体受损严重;#2号侵彻弹停滞于靶板中,弹体部分装药和弹体后盖被拔出,弹体保持完好.
水下爆炸环肋圆筒损伤机理数值模拟
作者：卢熹，WANG Shu-shan（State Key Laboratory of Explosion Science and Technology，Beijing Institute of Technology，Beijing 100081，China；北京理工大学 爆炸科学与技术国家重点实验室；State Key Laboratory of Explosion Science and Technology，Beijing Institute of Technology，Beijing 100081）
出处：第十届全国爆炸力学学术会议2014
关键词：武器装备；环肋圆筒；损伤机理；水下爆炸；数值模拟
摘要：采用量纲理论分析了水下爆炸作用下圆筒的损伤机理,并结合AUTODYN软件进行了环肋圆筒结构水下爆炸数值模拟计算.研究结果显示,在只改变药量和爆距条件下,圆筒结构在水下爆炸冲击波载荷作用下的相对变形量W/re主要与比例距离R/re和装药特征尺度re有关.在相同比例距离下,不同药量对圆筒输出的超压峰值相同,但由于输出的冲量以及波头形状不同,导致圆筒不同的损伤程度以及不同的损伤分布特征.W/re随着R/re的减小近似呈指数增加;同时W/re随re增加而增加,增加趋势随R/re减小而加快.
水下爆炸环肋圆筒损伤形态的数值模拟研究
作者：卢熹，WANG Shu-shan（State Key Laboratory of Explosion Science and Technology，Beijing Institute of Technology，Beijing 100081，China；北京理工大学 爆炸科学与技术国家重点实验室；State Key Laboratory of Explosion Science and Technology，Beijing Institute of Technology，Beijing 100081）
出处：第十届全国爆炸力学学术会议2014
关键词：鱼雷壳体；环肋圆筒；损伤形态；水下爆炸；数值模拟
摘要：为获得不同水下爆炸载荷强度下圆筒损伤形态的演化规律,利用AUTODYN软件对一种内部带环肋、两端连接配重的圆筒结构模型进行水下爆炸数值模拟计算.结果表明:圆筒在不同爆距下发生不同程度的塑性变形或破裂.圆筒壳体变形主要表现为迎爆面整体向内塌陷或中部的凹陷变形.壳体表面高塑性应变区主要分布于迎爆面壳体两端,随着载荷强度增加,最高塑性应变区域从两端的侧部变为两端的中部.圆筒破裂表现为轴向裂口、沿环肋裂口、沿配重裂口、中心碎片或背爆面破口.破裂的发展均以轴向裂口开始,而沿环肋裂口和中心碎片的形成逶常晚于沿配重裂口.最后,根据圆筒壳体塑性变形或破裂的损伤特征归纳出1 1种损伤形态.
一种新型多层结构防爆性能优化及分析
作者：钟云岭，GUO Xiang-hua（State Key Laboratory of Explosion Science and Technology，Beijing Institute of Technology，Beijing 100081，China；北京理工大学爆炸科学与技术国家重点实验室；State Key Laboratory of Explosion Science and Technology，Beijing Institute of Technology，Beijing 100081，Ch）
出处：第十届全国爆炸力学学术会议2014
关键词：装甲车；多层结构；优化设计；爆炸冲击波；抗爆缓冲性能
摘要：爆炸荷载产生的冲击波可能会对人员及装甲车辆等造成极大的损伤,装备要适应新形势下作战需求的更新升级,使得冲击波在有限厚度防护多层结构中的传播和衰减规律研究是一个急迫而现实的问题.因此本文运用大型动力有限元软件LS-DYNA,研究了不同夹层结构在相同爆炸冲击波作用下的抗爆缓冲特性,并对多层结构进行了优化设计. 结果表明:除结构材料特性外,夹层排列顺序也是冲击波衰减的重要影响因素,优化后的多层结构能够有效的起到衰减冲击波的作用.本文的研究对类似的多层抗爆缓冲结构优化设计有着一定的参考价值.
Unique Solutions for a New Class of Multi-Point Boundary Value Problem of Nonlinear Fractional Differential Equations
作者：邢高峰;张玲玲;;（太原理工大学数学学院，山西 太原 太原理工大学数学学院，山西 太原；北京理工大学爆炸科学与技术国家重点实验室，北京）
出处：Advances in Applied Mathematics2020P
关键词：分数阶微分方程;混合单调算子;存在唯一性;Fractional Differential Equations;The Mixed Monotone Operator;Existence and Uniqueness
摘要：In this paper, we study a new class of higher-order fractional differential equations with multi-point boundary value problems. First, we obtain G(t,s) through calculation, and construct the operator equation of the problem under study. Then, using the fixed point theorem of the mixed monotone operator in the new set Ph,e and the properties of G(t,s), the uniqueness of the solution of this type of equation is obtained. Finally, an example is given to illustrate the effectiveness and feasibility.
Effect of MgH2 on Thermal Decomposition Characteristics of DNTF
作者：龙茂豪;黄可奇;李志敏;张同来（北京理工大学，爆炸科学与技术国家重点实验室，北京）
出处：Journal of Advances in Physical Chemistry2022P
关键词：金属氢化物;热分解;DSC;分解峰温;活化能;Metal Hydride;Thermal Decomposition;DSC;Decomposition Peak Temperature;Activation Energy
摘要：In order to investigate the effect of metal hydride MgH2 on the thermal decomposition characteristics of DNTF, the differential scanning calorimetry (DSC) test was carried out by adding different contents of MgH2 into DNTF. In order to prevent DNTF from heating volatilization, a completely sealed crucible is adopted. The results show that MgH2 can reduce the exothermic decomposition peak temperature of DNTF thermal decomposition reaction, but different contents of MgH2 have different effects on the thermal decomposition of DNTF. With the increase of MgH2 content, the exothermic decomposition peak and decomposition activation energy of DNTF gradually decrease. When the content of MgH2 is higher than 8%, the thermal safety of DNTF is greatly reduced.
Numerical Simulation of Combustion Char-acteristics of Nanothermite Al/Bi2O32O3, a one-dimensional combustion model was established based on solid heat-transfer, combustion theory and chemical kinetics. By using COMSOL Multiphysics, combustion characteristics of nanothermite Al/Bi2O3 were simulated. The results show that there are three steps in the reaction, including heating up before combustion, diffusion of combustion and local thermodynamic equilibrium. The Al/Bi2O3 with stoichiometric ratio (21) has the best combustion characteristics. The highest equilibrium temperature, reaction rate and combustion velocity are 4217 K, 1.36 × 107 s−1 and 671.6 m/s respectively. With the decrease of particle size and activation energy, equilibrium temperature decreased, but the reaction rate and velocity of combustion increased. And the reaction delay time depended on the activation energy.">
作者：于海洋;王亚军;郭 梁（北京理工大学 爆炸科学与技术国家重点实验室，北京）
出处：Material Sciences2017P
关键词：纳米铝热剂;Al/Bi2O3;燃烧特性;数值分析;Nanothermite;Al/Bi2O3;Combustion Characteristics;Numerical Simulation
摘要：To study combustion characteristics of nanothermite Al/Bi2O3, a one-dimensional combustion model was established based on solid heat-transfer, combustion theory and chemical kinetics. By using COMSOL Multiphysics, combustion characteristics of nanothermite Al/Bi2O3 were simulated. The results show that there are three steps in the reaction, including heating up before combustion, diffusion of combustion and local thermodynamic equilibrium. The Al/Bi2O3 with stoichiometric ratio (21) has the best combustion characteristics. The highest equilibrium temperature, reaction rate and combustion velocity are 4217 K, 1.36 × 107 s−1 and 671.6 m/s respectively. With the decrease of particle size and activation energy, equilibrium temperature decreased, but the reaction rate and velocity of combustion increased. And the reaction delay time depended on the activation energy.
Study on the Influence of Chemical Reaction Rate on Detonation Characteristics—Base on Discrete Boltzmann Model
作者：张玉东;祝成民;;许爱国;;张广财（北京航空航天大学宇航学院，北京 北京应用物理与计算数学研究所计算物理重点实验室，北京 北京应用物理与计算数学研究所计算物理重点实验室，北京；理论物理国家重点实验室(中国科学院理论物理研究所)，北京；爆炸科学与技术国家重点实验室(北京理工大学)，北京）
出处：Advances in Condensed Matter Physics2015P
关键词：离散玻尔兹曼模型;爆轰;反应率模型;Discrete Boltzmann Method;Detonation;Reaction Rate Model
摘要：Based on the high-speed compressible model proposed in our group [Gan, Xu, Zhang, Yang, EPL 103 (2013) 24003], a new discrete Boltzmann model for detonation is presented. A new reaction rate function is adopted which comes from Lee’s model but only the growth term is used. Based on the new model, several kinds of detonations with different reaction rates are simulated and a critical reaction rate is found. In the case where the value of reaction rate equals to the critical value, the simulation results coincide well with CJ theory. In the cases where the reaction rates are lower than the critical value, the von-Neumann peak will appear firstly and then steady state is reached behind the detonation wave. The steady states in those cases are in the CJ detonation states. In the cases where reaction rates are higher than the critical rate, the detonation wave propagates at a speed faster than that of CJ detonation and the steady states in those cases are in the weak detonation states.
An Efficient Two-Dimensional Discrete Boltzmann Model of Detonation
作者：林传栋;李英骏;;许爱国;;张广财（中国矿业大学(北京)深部岩土力学与地下工程国家重点实验室，北京 北京应用物理与计算数学研究所计算物理重点实验室，北京 北京应用物理与计算数学研究所计算物理重点实验室，北京；理论物理国家重点实验室(中国科学院理论物理研究所)，北京；爆炸科学与技术国家重点实验室(北京理工大学)，北京）
出处：Advances in Condensed Matter Physics2015P
关键词：离散玻尔兹曼模型;爆轰波;Richtmyer-Meshkov不稳定性;非平衡效应;Discrete Boltzmann Model;Detonation;Richtmyer-Meshkov Instability;Non-Equilibrium Effect
摘要：A modified multiple-relaxation-time discrete Boltzmann model is proposed to simulate detona-tion. Compared with our previous model [A. Xu, C. Lin, G. Zhang, Y. Li, Phys. Rev. E 91 (2015) 043306] adopting 24 discrete velocities, this model employs only 16 ones and consequently has smaller computational cost of simulating reactive or nonreactive fluid flows. Additionally, this model has a better stability than the previous one in our numerical tests. Using this model, we simulate the Richtmyer-Meshkov instability induced by detonation wave in four cases. It is in-teresting to find that, when a detonation wave travels from the chemical reactant to a lighter nonreactive medium, since the chemical energy does not release any more, the temperature re-duces suddenly, and consequently a region with higher density exists around the material in-terface.
