爆炸冲击波是炸药爆炸时产生的强间断载荷，是引起人体颅脑、肺部等含气器官组织直接损伤的主导危害。基于Q235钢钢材和复合材料+液体两种典型材质的防爆装备，开展多种TNT药量的静爆试验和数值计算，研究空爆（FAB）、钢制防爆罐（SEP）和柔性防爆罐（FEP）3种不同防护条件下冲击波传播衰减规律，分析SEP和FEP两种典型防爆装备的响应过程与防护机理，获得典型装备冲击波超压峰值削弱防护的经验模型。研究结果表明：SEP和FEP可以大幅度削弱内爆炸冲击波载荷，相较于同位置处的FAB，SEP可削弱冲击波超压峰值55.4%~66.3%，FEP可削弱超压峰值57.2%~77.7%，且过当量爆炸时FEP的冲击波防护能力明显高于SEP；分析SEP和FEP的主要防护机理均为绕射遮蔽作用，但FEP的顶盖显著增加了冲击波与结构作用时间，通过水的动量提取效应和不同波阻抗界面反射削弱逃逸冲击波强度，而SEP中的冲击波仅通过刚性材料反射消耗后迅速绕射逃逸；建立了SEP、FEP冲击波峰值超压削弱经验模型，与试验结果相比SEP、FEP削弱模型平均误差分别为2.4%和10.2%；得到的典型装备冲击波削弱规律及防护经验模型为防爆罐装备设计提供了参考。

为解决现有的作战网络模型难以体现作战双方交互动态、节点删除策略脱离作战实际、体系能力量化过度依赖杀伤链数量等问题，提出一种基于交互对抗网络模型的体系作战能力计算分析方法。建立红蓝双方交互网络模型，将双方作战节点都纳入网络模型，通过可达性节点删除策略实现双方节点更新；引入杀伤链能力及体系杀伤链能力等概念，并以毁伤规模量化体系作战能力；考虑到不等概率网络2端连通度计算时的复杂度，采用蒙特卡洛仿真法求解体系杀伤链能力。仿真实验分析了影响体系作战能力的关键变量，并和其他方法进行了对比分析。研究结果表明，指控节点功能能力提升是作战体系的核心关键，对己方体系作战毁伤能力的非线性提升、敌方体系的非线性压制具有重要作用，仿真对比实验验证了所提方法的优越性。

芳纶织物由于其低密度、高模量、高强度特性被广泛应用于人体防弹领域，为提高芳纶织物的抗弹性能，通过纳米氧化锌颗粒种植生长对芳纶织物进行改性，开展电镜观察、准静态拉伸试验、纱线拉拔试验、弹道冲击试验和数值模拟工作，得到了氧化锌改性织物的力学性能和弹道性能。研究结果表明：氧化锌颗粒的种植增加了纤维之间的结构互锁与表面粗糙度，氧化锌改性织物的纱线间摩擦系数较纯织物提高了282%，弹道极限速度较纯织物提高了54.5%，且吸能与比吸能性能显著优于纯织物；通过细观纱线模型对织物的弹道冲击过程进行模拟，仿真结果与弹道试验结果具有良好的一致性，进一步说明了纱线间摩擦系数和拉伸强度的提升可以作为提高织物的抗弹道冲击性能的有效手段，为氧化锌改性织物在柔性防弹领域的应用提供了理论依据。

This paper investigates the effects of the physical properties on the microstructure and weldability of explosive welding by joining two metals with a significant contrast in thermophysical properties: stainless steel and copper. Sound welds between stainless steel and copper were obtained, and the interfacial morphology was wavy, regardless of the position of the materials. The weldability of dissimilar pairs was found to be more dependent on the relationship between the physical properties of the base materials than on the absolute value of the material property. When there is a significant difference in thermal conductivity between the flyer and the base plate, together with a material with a low melting temperature, the weldability of the pair is often poor. The relative position of the plates affects the interfacial microstructure even when similar morphologies are found. For the metallic pairs studied, the wave size was bigger for the configuration in which the ratio between the density of the flyer and the density of the base plate is smaller. The same phenomenon was observed for the impedance: bigger waves were found for a smaller ratio between the impedance of the flyer and the impedance of the base plate. © 2022 China Ordnance Society

Hydroxyl-terminated polybutadiene/toluene diisocyanate (HTPB/TDI) system is widely used in composite solid propellants. The migrations of plasticizers and water molecules from solid propellants and surrounding environment to the inhibitor have always been the important issues. This study focuses on the preparation, characterization and anti-migration behavior of graphene oxide (GO)/HTPB nanocomposite liner. The GO/HTPB (GH) composite liners affect the migration of small molecules through a tighter cross-linked structure and weakening function of small molecule adsorption. The anti-migration performance of the liner at different temperatures was analyzed, and the influence of the added amount of GO on the anti-migration performance and adhesion performance was also systematically studied. The overall performance of the liner is optimized when the amount of GO filler is 0.3 wt%. After adding 0.3 wt% GO, the concentration of dioctyl sebacate (DOS) migrated into the liner is decreased by 23.28%, and the concentration of water molecules is decreased by 51.89%, indicating that the introduction of GO can significantly improve the anti-migration performance of the liner. In addition, the bond strength is greatly increased from 0.25 MPa to 0.95 MPa, which meets the application requirements of the current propellant system. This research provides an important way for the preparation of structure-function synergistic anti-migration composite liners. © 2021 China Ordnance Society

Metamaterial based on local resonance has excellent vibration attenuation ability in low frequency. In this research, an attempt was performed to make meta-mortar with spring-mass resonators to attenuate vibration and shock hazards. Single-spring-mass resonators and dual-spring-mass resonators were designed and made using lead or aluminum blocks and SWPB springs encased by PMMA (polymethyl methacrylate) or aluminum frames. These resonators were placed into mortar blocks to make meta-mortar specimens. Vibration attenuation effect was investigated by sweeping vibration with frequency from 50 Hz to 2000 Hz. All these meta-mortar blocks exhibit excellent vibration attenuation ability in the designed band gaps. With dual-spring-mass resonators, meta-mortar blocks have two distinct vibration attenuation bands. © 2022 China Ordnance Society

Suitability of S-Glass/carbon fiber reinforced polymer composite for submarine hull subjected to hydrostatic pressure has been investigated in the present study. Metallic materials have raised concerns owing to their decomposition due to low resistance towards salinity and hence polymer composites have been explored to showcase their mechanical stability to withstand transverse and impact loads. To this end, the mechanical properties of S-Glass/carbon fiber reinforced polymer composite were experimentally investigated and higher specific strength and stiffness of the composite in comparison to many metallic materials used for submarine hull were reported. The obtained experimental values were used for the static and dynamic crash analysis of the bow, stern and foil through Finite Element Analysis (FEA); where depth of travel was varied from sea surface level of 0–7000 m. Submarine assembly was later developed with the optimum shape and thickness of each part. We also report the nonlinear crash analysis upon impact at velocity ranging from 3 to 21 m/s. Besides, kinetic energy, acceleration peak and internal energy in struck submarine revealed that travel depth 1750 m and 3500 m is recommendable, more particularly, crash safety factor of the submarine is found to be within limit when submarine encounters crash at 1750 m. © 2022 China Ordnance Society

现代大口径火炮电动装填系统涉及多个电机协同控制，无位置传感器控制技术的应用可以显著提高驱动系统可靠性。而表贴式永磁同步电机在零/低速下的转子位置辨识恰是该技术的难点。针对该问题，提出采用基于机械运动模型的Kalman滤波器辅助转子位置估计方法；辅以观测器抗扰技术以消除模型参数不确定等扰动对转子位置辨识的影响，实现零/低速重载下可靠的起动/急停控制。新算法突破了常规的基于电气模型转子位置估计方法的局限性，进而大幅度提高了无位置传感器技术在零/低速下的负载能力，实现了可以媲美有位置传感器伺服的驱动控制功能。以该榴弹炮模块药装填和输弹过程作为算例，通过仿真验证了该技术。该无位置传感器电机控制技术已应用于155 mm榴弹炮装填系统。

频率自适应变刚度扭转吸振器的半主动控制研究是实现动力传动系统扭转减振的关键。针对某履带车辆动力传动系统，建立含变刚度扭转减振器的系统动力学模型，基于系统模型提出瞬态查表和稳态寻优结合的控制策略，有效地消除系统外部激励主导频率识别偏差，使变刚度扭转吸振器能够快速跟随外部激励主频，实现扭转吸振器的半主动控制。仿真和试验的研究结果表明，所提综合控制方案能有效提升减振性能10%。

To explore the effect of different positions and number of pyrrolidine bound to the carbon cage on the stabilization effect of fulleropyrrolidine derivatives to nitrocellulose (NC)/nitroglycerine (NG), we synthesized N-(4-methoxy) phenylpyrrolidine-C60 and four different of bis(N-(4-methoxy) phenylpyrrolidine)-C60 compounds through Prato reaction. Their structures were characterized by UV–vis, 1H NMR, 13C NMR, high-resolution mass spectroscopy, and single-crystal X-ray diffraction. Their stabilization effect to NC/NG were investigated using differential scanning calorimetry, methyl violet, vacuum stabilization effect, weight loss, and accelerating rate calorimeter tests. The results indicated these compounds had excellent stabilization effect to NC/NG. The stabilization effect of the fulleropyrrolidine bisadducts to NC/NG is significantly better than that of fulleropyrrolidine monoadduct and C60. Moreover, the position where pyrrolidine binds to fullerene in fulleropyrrolidine bisadducts is different, and its stabilization effect to NC is also different. The stabilization effect order of different bisadduct isomers to nitrocellulose is as follows: e-edge > trans-2> cis-2> trans-3. Electron paramagnetic resonance (EPR) and FT-IR were used to study the stabilization mechanism of fulleropyrrolidine derivatives to NC/NG. The EPR results also show that fulleropyrrolidine bisadducts with different addition sites have different abilities to absorb nitroxide, and their ability is better than that of the monoadduct and C60, which is consistent with the results of stabilization effect performance test. © 2021 The Authors