bluuebunny/crossref_metadata_2025_split huggingface dataset:
Formation behavior of truncated hypervelocity shaped charge jet
Authors: Li P L , Wang K , Zhang X Y , Li Y L 
Published: December 2024

Abstract
Truncated liner shaped charge(TLSC) structure can form truncated hypervelocity shaped charge jet(THSCJ), which is significantly different from the ordinary shaped charge jet(OSCJ). The formation behavior of THSCJ is studied by numerical simulation and theoretical analysis. The results show that the additional liner can enhance the propagation of detonation wave and the improvement of jet velocity. The head velocity of THSCJ is obviously higher than that of OSCJ. The influence of liner structure on the formation performance of THSCJ is investigated by changing the protruding length of the additional liner and the height of the truncated liner. Within the given range of structural parameters, when the protruding length of the additional liner is 1.5mm, and the truncation height is 1/3 of the total height of the liner, the performance characteristics of THSCJ is more stable.
Scheme Optimization of Artillery Based on Combination Weighting Approach
Authors: Huang Ke , Yang Jianwei , Wei Jiqing , Tang Pengbo , Lu Yuxiang 
Published: December 2024

Abstract
The system efficiency method can be used to evaluate and select from the multiple schemes in the demonstration and scheme design stage. Taking the multi-scheme optimization of a new type of equipment carrying artillery with different calibres as the demand, the using requirements and combat environment of artillery are analyzed, and the inherent capability evaluation system composed of shooting capability and destructive capability is constructed. Due to the great difference in the judgment of indicator weights by experts from different industries, the combination of subjective weighting approach and objective weighting approach is used to determine the weight of each indicator, and the multi scheme evaluation model of artillery firing is established. The evaluation results show as follows: when using subjective weighting approach alone, the scheme with comparative advantage can’t be picked out because of the prefer to the maximum effective range by experts; when using objective weighting approach alone, the sample data vary greatly from indicator of maximum firing rate, but the change of the indicator has no significant impact on the combat effect; and when using the combination weighting approach, the evaluation results can avoid not only the preference of experts, but also the deviation of weights from the actual demand caused by the large difference between sample data.
Optimized design of a lightweight frame based on padded fabric
Authors: Chen Chen , Wang Hua-Ting , Zhang Tai-Ping , Huang Chen-Xu , Meng Fan-Zhe 
Published: December 2024

Abstract
In order to solve the problem of unreliable connection between the subframe and the chassis girder under the action of shooting load, which leads to the reduction of the stiffness and strength of the connection between the bodywork part and the chassis girder, and affects the shooting accuracy of the bodywork, combined with the structural characteristics of the rigid connection between the subframe and the chassis girder, the fabric filling and bolt preloading connection method is proposed, the finite element model is established, and the deformation of the connection between the original and the improved scheme is analyzed. The results show that under the action of shooting load, the deformation of the bodywork mounting surface can be effectively reduced and the shooting accuracy of the bodywork can be improved by bolt pretensioning and spinning fabric filling, which provides a certain reference for the optimal design of the lightweight frame.
Microstructure and mechanical properties of high nitrogen austenitic stainless steel welded joints using tandem gas metal arc welding
Authors: Li Jianguo , Jia Dongsheng , Cui Jianwei , Zhao Yinhu , Ji Huang , Zhang Hanfu , Wang Zhiyong , Wang Xu , Li Yi , Zhao Leicheng 
Published: December 2024

Abstract
High nitrogen austenitic stainless steel welded joints were obtained by gas metal arc welding and tandem gas metal arc welding, respectively. Compared with single wire welded joint, tandem welded joint was investigated. Although tandem welding has less welding pass than single wire welding, higher heat input and cooling rate are obtained. High heat input is the main impact factor on low fraction of δ-ferrite and high fraction of precipitates formed during tandem welding. Moreover, weld seam after tandem welding has higher dislocation density and Schmid factor along δ-ferrite, which results in the reduced tensile strength and yield strength, as presented in mechanical property testing. Less difference of elongation is obtained between single wire welding and tandem welding, as is consistent with Taylor factor results.
Method of missile formation positioning and tracking based on TDOA-DOA
Authors: Kong Weijie , Wang Yi , Dong Leiping , Li Yanzhao 
Published: December 2024

Abstract
With the development of science and technology, the battlefield environment of modern warfare has become complicated and complex, and it has become an important task to obtain information about enemy targets quickly and accurately. Accordingly, researchers from various countries have explored various positioning methods, which can be divided into active and passive positioning, among which passive positioning has received more attention due to its excellent concealment and anti-jamming ability. In this paper, the two methods of passive positioning, Direction of Arrival (DOA), and Time Difference of Arrival (TDOA), are used to study the positioning of missile formations in two- and three-dimensional space and to analyse the factors affecting their positioning accuracy.
Preparation and mechanical properties of 316L-Ti composites by Laser Powder Bed Fusion
Authors: Guo Xin , Li Xiaojun , Li Wei , Xie Changyou , Zhang Qiaoxin 
Published: December 2024

Abstract
To investigate the feasibility of additive manufacturing of energetic structural materials, this study fabricated 316L-Ti composites using Laser Powder Bed Fusion. The research examined the forming process parameters of 316L-Ti and analyzed the changes in relative density, defects, phases, and mechanical properties of the composites with varying laser energy densities. The results indicate that the primary defects in 316L-Ti composite samples are delamination and lack of fusion (LoF) pores. At high laser energy densities, delamination cracks are likely to occur, leading to significant delamination, warping, and even failure to form the samples. Conversely, at low laser energy densities, samples show minimal delamination but an increase LoF pores, leading to worsened mechanical properties. The addition of titanium results in the presence of both austenite and ferrite phases. Optimal results are achieved at a laser energy density of 120 W and a scanning rate of 1200 mm/s, yielding samples with minimal defects, achieving a density of 91.69% of the theoretical value, and demonstrating a compressive strength of 1191 MPa.
Determination of Relative Molecular Mass and Distribution of Methyl Vinyl Silicone Rubber by Gel Chromatography
Authors: Guo Wenjia , Hou Qianqian , Dong Yazhuo , Xu Feng , Zhu Tianyi , Zhang Wenshen , Song Lei , Li Shengkai 
Published: December 2024

Abstract
The relative molecular mass and distribution of methyl vinyl silicone rubber were determined by gel chromatography. The method was studied for single detector. The analytical conditions were established as follows: tetrahydrofuran as mobile phase, two PLgel MIXED-B columns in series, column temperature of 40 °C, and flow rate of 1 mL/min. The relative molecular mass of polystyrene standard substance was determined by this method. The relative standard deviation of the measured values was less than 3% (n=6), the relative error of the number average relative molecular mass was less than 10%, and the absolute value of the relative error of the weight average relative molecular mass was less than 1%.
Uncertainty based design methodology system for naval gun weapon
Authors: Li YD , Kang ZK , Ren G 
Published: December 2024

Abstract
With the continuous improvement of the requirements for progressiveness and economic affordability of naval gun weapon, the development of naval gun weapon is facing increasingly severe challenges. The current naval gun weapon are still based on deterministic design, but there is insufficient attention paid to the large number of random and cognitive uncertainty factors in the entire lifecycle process of naval gun weapon. These uncertain factors are often the root cause of a series of problems such as long R&D cycles, low manufacturing qualification rates, difficulties in use and maintenance, and low reliability. This article focuses on the current status of naval gun weapon design. Firstly, it analyzes the uncertainty factors and their impacts throughout the entire lifecycle of naval gun weapon. Then, it elucidates the method system and challenges encountered in uncertainty design. It points out that quantitatively evaluating and controlling performance dispersion in each stage of design is an effective method for formulating the optimal design scheme for comprehensive performance, reliability, robustness, and cost throughout the entire lifecycle.
Characterization of laser power on additive manufacturing of heterostructure parts
Authors: Li Shiyi , Feng Hengzhen , Lv Sining , Kan Wenxing 
Published: December 2024

Abstract
In order to meet the demand for low-cost and rapid prototyping of micro-small parts for highly dynamic microsystems, metal additive manufacturing technology has become one of the important means of manufacturing heterogeneous parts. In this paper, the residual stress and deformation generated by the rapid prototyping process of micro-small and complex parts under different laser frequencies are firstly simulated and analyzed, and then in order to check the resistance of the parts to high overload, the densities and hardnesses of the printed parts are experimentally tested. The results show that, on the basis of ensuring that the powder can be fully melted, the lower laser power, the smaller residual stress of the micro-small complex parts, the smaller deformation of the parts caused. The physical energy density also shows a certain correlation to the density and hardness of the specimen, the higher physical energy density, the higher density and hardness of the specimen.
Research on the performance optimisation method of linear array infrared detector based on pixel decomposition
Authors: Hu Shiyuan , Wu Yanjiang , Si Xinlu , Han Shaorong , Chen Huimin 
Published: December 2024

Abstract
Facing the background of proximity detection applications, this paper proposes an optimisation method based on pixel decomposition to improve the detection performance in view of the strong dark current and blind pixel rate problems brought by the increase of pixel size. By establishing the linear array infrared detection model, the influence of pixel size on detector system dynamic range, noise equivalent temperature difference, spatial resolution and other performance parameters is obtained. Based on the idea of pixel decomposition, a suitable resolution is chosen to decompose a large-size pixel, and the photoelectric conversion process of each sub-pixel is equated. The simulation verifies that the proposed optimisation method of the pixel decomposition improves the detection signal-to-noise ratio.
Application of 3D Gaussian Splatting target Reconstruction in short-range detection
Authors: Lou Wenzhong , Li Chenglong , Feng Hengzhen , Ding Nanxi , Zhang Zihao , Ma Wenlong , Wang Lin 
Published: December 2024

Abstract
The research presented in this paper successfully introduces the emerging 3D reconstruction technology to specific application scenarios, especially for the strict requirements of information authenticity and timeliness for reconnaissance equipment and platforms. Traditional methods have the problems of slow speed and damaged reconstruction quality in processing reconnaissance information. In order to solve the problem of limited computing power of aerial detection platform and improve the reconstruction quality and efficiency of complex scenes, this paper introduces three-dimensional Gaussian Splatting (3DGS) method for testing. Experimental results show that 3DGS has excellent performance in rendering accuracy and real-time performance, which can effectively meet the performance requirements of aerial detection platforms. We tested it on a virtual dataset, and the experimental results show that it can also maintain excellent performance in the real world.
Monte Carlo Analysis and Optimization of Inertial Switch Tolerance of a Proximity Fuze
Authors: Zhao Xin , Sa Haijing , Qiu Liliang , Zhang Wenyi , Song Rongchang 
Published: December 2024

Abstract
Aiming at the low operation rate of the firing mechanism of ammunition fuze, robustness analysis and probabilistic design methods were introduced into the fuze design to carry out system simulation research on performance prediction and optimization of the firing mechanism of ammunition fuze. In this paper, the dynamic model of the inertial impact switch of a proximity fuze is established, and the mechanism can be reliably triggered under nominal values by simulation method. Based on the Monte Carlo simulation of dimensional tolerance distribution, the trigger performance is evaluated. The contribution rate of each dimension variable to the target value is obtained by using the optimal Latin hypercube experiment design, and the variable tolerance with greater contribution rate is optimized by Pointer algorithm. After optimization, the range of variable Jdxh_f was optimized from 0.1274 to 0.1666 to 0.1274 to 0.1556. Finally, the optimized results were validated, with a uniform distribution yielding 0.003193517N, a bimodal distribution yielding 0.2230769N, and a normal distribution yielding 0.2778532N. The validation analysis of these results shows that the target value distribution data after optimization meets the design requirements. This study seeks a balance between performance reliability and manufacturing cost, which is of great significance to improve product performance and reduce manufacturing cost.
Research on aerodynamic and ballistic characteristics of rotary wing type aerodynamic layout rocket
Authors: Li Peng , Sang Manxian , Cao Wenjun , Tian Lin , Ma Yue , Zhang Kuan , Duan Tengfei , Cheng Yuyang , Du Meijie , Shi Yongpeng 
Published: December 2024

Abstract
Rockets with a rotating wing type pneumatic layout as the research object, using the method of numerical simulation of subsonic stage of the rocket was studied at different attack angles, Mach Numbers and aerodynamic characteristics under different conditions of rudder Angle, and obtained the corresponding pneumatic parameters, and the influence of the relationship between the aerodynamic parameters. The motion equations of rocket are established, the force and moment of rocket during flight are analyzed, and the ballistic characteristics under different muzzle velocity and different launch elevation are simulated and analyzed, and the ballistic effects of different muzzle velocity conditions are obtained.
Numerical simulation study on the matching of third-generation explosives and large-caliber reactive shaped charge
Authors: Yao Xiaoshuo , Yan Yueguang , Zhang Bo 
Published: December 2024

Abstract
In order to further study the matching problem between the third-generation explosives and the large-diameter active shaped jet charge, the jet forming characteristics and thermo-mechanical coupling characteristics were studied based on the AUTODYN-2D finite element analysis platform. The evolution behavior and distribution law of pressure field, velocity field and temperature field during the active jet forming process were analyzed, and the active jet forming law under different charge structures was analyzed. The numerical simulation results show that the large-diameter active energy-gathering structure under the condition of the third-generation explosive charge can form a stable active jet. With the extension of the jet forming time, the high-pressure zone and the high-temperature zone have obvious movement and diffusion phenomena. The high-speed zone moves from the middle of the axis to the head of the jet, resulting in a velocity difference between the head and tail of the jet. In addition, the penetration ability parameters of PTFE / AL active jet, such as head velocity and effective jet length, are significantly improved by the third generation explosives, especially CL-20 explosives, and are significantly affected by the charge type, the thickness of the active liner and the cone angle of the liner.
Graphene Composite Modified Manganese Dioxide Cathode Materials for Thermal Batteries
Authors: Shang X M , Wang F , Zhou S F , Shen B , Li Y M , Yan L 
Published: December 2024

Abstract
Limitations on rated voltage and discharge current density pose challenges to battery miniaturisation, affecting their application in missiles and other weapon systems. A modification method of graphene composite manganese dioxide (MnO2) cathode material has been proposed. This method enhances the performance of lithium manganese dioxide thermal batteries (heat activated reserve batteries) by achieving a continuous discharge time from milliseconds to seconds, with a single-cell voltage exceeding 2.6V and a cathode output of 160 mA/cm2. Experimental results indicate that graphene-composite modification improves the output performance of individual lithium manganese dioxide thermal cells and facilitates the reduction of thermal battery design volume. However, further research is necessary to address the relatively low output current density of this thermal battery system.
Fracture toughness of fibre failure modes in laminated composites under dynamic loading
Authors: He Rui , Cheng Longfei , Gao Yidi , Cui Hao , Li Yulong , Liu Jianhu 
Published: December 2024

Abstract
The fracture toughness regarding fibre tensile failure and fibre compression kinking was measured using compact tension and compact compression specimens on a uniaxial bi-directional electromagnetic Hopkinson bar system. During the dynamic tests, the strain/displacement fields were monitored using the digital image correlation technique with a high-speed camera. Digital and scanning electron microscopy were used to investigate the fracture faces of the tested specimens. The initial fracture toughness for fibre tensile failure under quasi-static and dynamic loading was 166 kJ/m2 and 113 kJ/m2, respectively. For fibre compression kinking, the initial fracture toughness was approximately 120 kJ/m2 for both loading conditions. Less fibre pull-out may be responsible for the decrease in fracture toughness for fibre tensile failure under dynamic loading. Whereas for fibre compression kinking failure, there was no significant difference in the fracture faces of the damaged specimens at different loading rates.
Optimization of Heat Treatment Process for the Improvement of Mechanical Properties in Metastable β Titanium Alloy
Authors: Chen Kai , Li Nan , Tao Zhiguo , Li Jishan , Wang Wanpeng , Shen Zhiwei , Wu Di , Pan Hongyun 
Published: December 2024

Abstract
Metastable β-type titanium alloys have garnered significant attention due to their microstructural diversity and excellent mechanical properties. In this study, the metastable β titanium alloy Ti-6Mo-3.5Cr-1Zr was subjected to the optimized heat treatment process. The optimization resulted in simultaneous enhancement of strength and ductility via grain refinement strengthening and transformation induced plasticity during plastic deformation. Furthermore, alloy microstructure analysis was conducted using Scanning Electron Microscope (SEM), Electron Back Scatter Diffraction (EBSD), and Transmission Electron Microscope (TEM) experiments. This work reveals the influence mechanism of solid solution time on the mechanical properties of titanium alloys, which provides theoretical guidance for the subsequent composition design and preparation of high-strength and high-ductility titanium alloys.
An improved LSSVM-based method for prediction demand for maritime logistics support material
Authors: Sun Jianxin , Liu Yuxuan , Tang Haonan , Shen Junyi , Zhang An , Bi Wenhao 
Published: December 2024

Abstract
The primary task of carrier formation maritime logistics support is to supply ammunition, oil, food, water, and other materials to carrier and formation ships at sea, ensuring strong survivability and sustained combat capability. To ensure adequate supplies for maritime missions, the logistics department needs to make an accurate scientific prediction of material consumption before the mission. In this paper, a method for maritime logistics support material demand prediction based on an improved least squares support vector machine is proposed, and the feasibility and accuracy of the method are validated through various arithmetic examples and realistic scenarios, demonstrating its practical applicability and accuracy in predicting material demands.
Research on the Aerodynamic and External Ballistic Characteristics of Bullets Based on Low-Temperature Meteorological Factors
Authors: Zheng Xu , He Liang , Wei Wei , Wang Haosheng 
Published: December 2024

Abstract
To further investigate the aerodynamic and ballistic trajectory characteristics of a certain type of ammunition under the influence of low-temperature meteorological factors, based on computational fluid dynamics and rigid body dynamic trajectory equations, numerical calculations and analysis of the aerodynamic characteristics and 6-degree-of-freedom rigid body ballistic trajectory, as well as low-temperature environmental ballistic trajectory flight tests, were conducted on this type of ammunition. The research shows that under constant atmospheric pressure, as the ambient temperature decreases, the pressure on the bullet surface increases, the aerodynamic parameters of the bullet decrease, and the convergence trend of the bullet’s ballistic trajectory angle of attack weakens significantly; under constant low-temperature, as the atmospheric pressure decreases, the pressure on the bullet surface decreases, the changes in the aerodynamic parameters of the bullet are small, and the convergence trend of the bullet’s ballistic trajectory angle of attack increases.
Stochastic evolution of projectile motion during artillery exterior ballistic
Authors: Mingming Wang , Rongjun Yang , Hongbin Chen , Jinsong Tang 
Published: December 2024

Abstract
In order to analyze the variation law of the flight distance error of the unpowered projectile with time, the probability density function (PDF) of projectile flight distance is calculated by the probability density evolution method (PDEM) based on 6 degrees of freedom rigid ballistic equation with random parameters of the projectile. A test example shows that the calculated results of PDEM are consistent with Monte Carlo (MC) method, which further verifies the effectiveness. In addition, the evolution of projectile flight distance and its error is analyzed within the given ranges of projectile parameter error, which provides a reference for the general design of artillery.