Accurately evaluating the explosive performance of newly developed energetic materials is important for the design of high-energy warheads. Different energetic materials have distinct effects in terms of the thermal damage and the damage caused by the pressure of the shock wave. In this study, the authors seek to quantitatively evaluate the explosive power of new energetic materials on the basis of the above factors. We consider single-parameter models for the evaluation of both the pressure of the shock wave and the thermal dose, and use them to propose a comprehensive method to assess the explosive effects of new energetic materials based on their weight distribution. We first build a test system to obtain the thermal dose corresponding to the typical proportional distance based on the typical peak pressure. We then construct a normalized model of the surface-reflected pressure and the thermal dose by using the proportional distance related to a typical shock wave. Finally, we calculate the specific equivalent of new energetic materials relative to TNT (Trinitrotoluene) and use it to quantitatively evaluate its explosive power. The results of experiments to assess the performance of the proposed method show that it is applicable, and can be used to assess the explosive effects of new energetic materials.

Trenches, as important military defense measures, have significant practical significance in studying the impact of trench terrain on the propagation patterns of explosive shock waves. This research is based on numerical simulations and establishes six trench models with depths of 0 mm, 200 mm, 400 mm, 600 mm, 800 mm, and 1000 mm, as well as five different lengths of trenches: 400 mm, 600 mm, 800 mm, 1000 mm, and 1200 mm. The internal and front-to-back shock wave pressures within the trenches were numerically calculated. The research findings indicate that as the depth of the trench increases, the pressure at the midpoint of the trench bottom gradually decreases within a depth of 800 mm, and then slowly increases beyond 800 mm. As the length of the trench increases, the pressure on the trench bottom significantly decreases when the length does not exceed 600 mm, but steadily increases after reaching 600 mm.

Matrix-searching CCD temperature measurement technology can integrate the complex signal modulation process of CCD because of its forward solution of inverse problem. But in the existing research, there is still a lack of discussion on the temperature calculation ability of this technology in the internal modulation process. Therefore, the research on the influence of temperature calculation performance of matrix-searching CCD pyrometer is carried out. Based on the three-channel temperature equation and the radiation acquisition theory of the detector, the evaluation model of effective measurement range and temperature resolution is defined and constructed. Combined with the calibration experiment, the effects of gain and gamma internal modulation parameters on the effective temperature measurement range and temperature resolution are discussed. Through the analysis of the simulation results, the use and effects of the two internal modulation parameters are obtained, which not only improves the theoretical system of the matrix-seeking temperature measurement method, but also provides theoretical guidance for the parameter selection of the method under different conditions.

The explosion shock wave pressure distribution law is significantly affected by the altitude. It is very important to clarify the altitude impact on the explosion shock wave pressure propagation law for guiding the shock wave pressure test and accurately evaluating the ammunition damage power. The paper reviews the finite element numerical simulation and actual testing results of researchers at home and abroad regarding the propagation of explosive shock wave pressure through different air and water mediums, and clarifies the impact of altitude on characterization parameters of shock wave pressure such as peak pressure, impulse, and positive pressure duration. Based on the current research status both domestically and internationally, we have pointed out the main problems that still exist in the current research process and proposed research directions that need to be focused on in subsequent studies.

Concrete piles are a common obstacle in an antilanding obstacle field. To research the damage ability of concrete piles with different shaped charges, penetration tests of concrete piles with different standoff distances (SODs) were carried out with explosively formed projectiles (EFPs) and jetting projectile charges (JPCs). The pressure was measured at different positions inside the concrete piles during the penetration process, and the failure mechanism and damage characteristics of the concrete piles were analyzed. The penetration velocity of the JPC was measured by placing reticular targets inside the concrete pile. The results show that the damage ability of JPCs to concrete piles is stronger than that of EFPs. When the SOD is in the range of 20∼50 cm, an EFP causes slight damage to a concrete pile. With the increase in SOD, the penetration capacity of JPCs increases, but the damage ability of JPCs decreases. When the SOD is 15 cm, a JPC causes severe damage to a concrete pile, and when the SOD is in the range of 20∼40 cm, a JPC causes moderate damage. When attacking targets with obvious side boundary effects, such as concrete piles, the SOD that results in the strongest damage is not the SOD that results in the strongest penetration ability.

In order to enhance the heat dissipation of a chip, this work investigates the enhancement of the thermal homogenization effect of a ceramic substrate with a high-thermal-conductivity graphene material to improve the interfacial heat transfer performance. AgCuTi-activated brazing material is used to connect the graphene film/AlN. The mechanism of the influence of brazing temperatures on the microstructure and thermal conductivity of joints is discussed. The thermal conductivity of the graphene/AlN double layer composite brazed at 890 °C for 10 min holding time was the highest at 482.3 W m⁻¹ K⁻¹. This study provides a new solution for the application of AlN ceramics in high-heat-flow scenarios.