bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on the damage effectiveness of AHEAD against the LSS UAV clusters
Authors: Fan Ji , Tang Xu , Wang Baohua , Shu Lipeng , Lu Yin , Chen Xiaoming 
Published: May 2023

Abstract
With the expansion of unmanned aerial vehicle(UAV) applications and increased power, the status of unmanned aerial vehicles in the military field has continued to improve. How to effectively defend against UAV attacks has become a key research issue in various countries. The damage assessment model of the AHEAD in the literature [17] does not consider the systematical error of anti-aircraft artillery, and ignores the dispersion error of the AHEAD explosion-points in the direction of the vertical interception plane, which leads to the inaccuracy of the calculated damage probability. In this paper, the model is modified, the systematical error and the dispersion error of the opening point in the direction of the vertical interception plane are added to the original model, and then the improved model is used to analyze the damage effectiveness of the AHEAD against two typical LSS UAVs. It shows that the AHEAD has good damage efficiency to LSS UAVs. To a certain extent, it has the ability to counter the LSS UAV clusters.
Analysis of Muzzle Flow Field Characteristic of Machine Gun in Different Environments
Authors: Zhang X , Zhang X W 
Published: May 2023

Abstract
To study the distribution characteristics of the muzzle flow field of the underwater sealed launch in different environments, a two-dimensional axisymmetric multiphase flow numerical model was established. The VOF multiphase flow model, Standard k-ε turbulence model, user-defined function (UDF), and dynamic mesh technology are used to simulate the evolution process of the muzzle flow field of underwater sealed launch and air launch. The calculation results show that the muzzle flow field of the underwater sealed launch is significantly different from that in air. The initial velocity of the projectile for underwater sealed launch is 64 m/s, lower than that in air, while the muzzle pressure and temperature are significantly increased. The Mach disk is initially formed at about 145μs for launched underwater, while it is about 240μs for air launch. When launching underwater, the velocity of the projectile is linear attenuation after it leaves the muzzle, while the projectile first accelerates and then slowly decays launched in air. Compared with launching in air, the core area of the shock wave launched underwater is smaller, the pressure at the warhead is relatively higher, and there is no crown shock wave in front of the projectile head.
Analysis and Optimization Design of Gunpowder Gas Sealing Performance of a Revolving Chamber Automatic Mechanism
Authors: Gu B , Ye KW , Liu PK , Ning BF 
Published: May 2023

Abstract
When the revolving chamber automatic mechanism fires, it is required to reserve a gap between the revolving chamber bushing and its bushing hole to move back and forth to realize the gunpowder gas sealing performance between the barrel bushing and the revolving chamber bushing. Its gas leakage failure modes mainly include the radial gap gas leakage between the revolving chamber bushing and its bushing hole as well as the transverse gap gas leakage between the end surfaces of the two bushings. Aiming at the two typical gas leakage failure modes, the analysis models of the revolving chamber bushing radial clearance and the transverse clearance of the end surfaces of the two bushings are established respectively. Combining with the load such as chamber pressure, the gas sealing performance is analyzed, the effects of unilateral clearance, groove and pushing force acting outer diameter on the gas sealing performance are analyzed, and the optimal design scheme of the gas sealing performance is put forward. Taking the maximum instantaneous flow as the evaluation index, the gas sealing performance of the revolving chamber automatic mechanism is improved by more than 30%. The research has important reference value for the design of gas sealing structure of revolving chamber gun.
The simulation of the rigid-flexible coupling model of the tank firing on the move based on fully flexible body modeling method
Authors: Liu J , Zhang C , Zhou F M 
Published: May 2023

Abstract
Generally, the rigid-flexible coupling model based on the modal reduction method cannot realize the contact between the rigid body and the flexible body. Based on the multi-body systems dynamics and fully flexible body modeling method, the rigid-flexible coupling dynamics model of the tank gun system was constructed. Then by combining with the PID control model, the mechanical/control co-simulation model of the tank gun on the move was constructed. The influences of the control system and vehicle speed on the muzzle vibration during the shooting process were respectively analyzed. It has been shown that the control system model can effectively simulate the response characteristics of the muzzle during the move of the tank. Under the same road surface and the same control law, the frequency and amplitude of the muzzle angular displacement in the low frequency range increase with the increase of the vehicle speed. The constructed model and the simulation results are of great significance to the analysis and optimization of the shooting accuracy of the tank gun on the move.
Parameter estimation of the shell transfer arm of a loading mechanism
Authors: Zhou S J , Chen G S , Gao X K 
Published: May 2023

Abstract
The shell transfer arm is a key component of gun automatic loading mechanism, the coordination speed and positioning accuracy have an important impact on gun ammunition delivery effect. Establishing an accurate dynamic model is the foundation for better control and prediction, therefore, it is necessary to identify the dynamic parameters of the shell transfer arm. In this paper, the dynamic model is established based on the topology method. The parameter identification model of the shell transfer arm is constructed by applying the dynamic model and unscented Kalman filter theory. Dynamic parameters of the shell transfer arm such as the mass, inertia and centroid position are estimated under unscented Kalman filter scheme. By comparing the parameter estimation results with the nominal design values, the feasibility and effectiveness of applying the proposed method to identify the dynamic parameters of the shell transfer arm are verified.
A review of stability control algorithms for weapon platforms
Authors: Li Y X , Xu H B , Gu G X , Guo Y J , Wang B 
Published: May 2023

Abstract
Weapon platforms are considered to be one of the important preconditions that ensure modern weapon systems achieve expected functions, while the critical factor affecting platform stability is control algorithms. Firstly, this paper introduces the importance of weapon platforms and their control algorithms, and classifies conventional weapon platforms. Secondly, after analyzing the application of conventional and modern control algorithms in different weapon platforms, this paper presents the new development trends of weapon platform control algorithms, with the goal of providing some ideas for the development of weapon systems and weapon platforms in China.
Analytical Study on the Trajectory of a Projectile Motion with the Quadratic Resistant Law
Authors: Ding T B , Lin Z W , Wang G , He Z 
Published: May 2023

Abstract
In this paper, the trajectory of a projectile in a resistant medium with quadratic resistant law is investigated. Based on the elementary analysis method, the equation for the trajectory in Cartesian coordinates system is derived. By retaining the first order derivative of the slope of the trajectory, the trajectory equation is integrated by two different schemes, the Riccati eqation expansion method and the exp-function method. The solutions obtained in this paper present new viewpoint for future investigations on the traditional mechanical problem.
Projectile-Artillery-Propellant Coupled Optimization Design Method of Artillery Weapon Systems
Authors: Shen Qing-ming , Yan Li-jun , Zhao Jian-zhong , Gao Ying , Yuan Yong-qiang , Wang Er-liang , Zhang Shi-ming , Ma Chao 
Published: May 2023

Abstract
The artillery weapon system is a complex system of great non-linearity. There are many factors and their coupling relationship affecting the firing performance of artillery, and the key factor positioning is difficult. How to improve the firing performance of artillery through optimization is a challenge. The current optimization method considers less coupling factors. To approach this challenge, a projectile-artillery-propellant coupled optimization design method is proposed, where a multidisciplinary coupling of projectiles, artillery and propellant is proposed and used to construct an optimization model, and the minimum initial disturbance is taken as the optimization objective. The simulation results show that at the moment when the projectile exist the muzzle, the optimized muzzle vibration displacement is reduced by 47.6%, the muzzle vibration speed is reduced by 33.4%, the average nutation angle is reduced by 63%, the average nutation angular speed is reduced by 27%.
Research on the Vibration Response of an Aircraft Gun Muzzle Based on Nonlinear Finite Element
Authors: Tian N , Zhao J , Wang K , Wang K , Du X , Liu Z 
Published: May 2023

Abstract
The muzzle vibration response of an aircraft gun is one of the key factors affecting the firing accuracy of the aircraft gun. In order to study the muzzle vibration response of an aircraft gun, based on the basic theory of the nonlinear finite element method, the nonlinear finite element dynamics simulation model is established by considering the nonlinear factors which are the contact and collision between the gun aircraft and the cradle, the contact and collision between the elevating gear arc and gear, and the slide clearance between the aircraft gun and the cradle, etc. The muzzle vibration response is characterized by the linear displacement and linear velocity of the center point of the aircraft gun, and its dynamics is obtained through numerical calculation and simulation. The correctness of the dynamics simulation model of the aircraft gun muzzle vibration is verified by setting up verfication bench. The results show that the established nonlinear finite element dynamic simulation model can be used to predict the muzzle vibration response of the aircraft gun, and at the same time, by changing the slide clearance between the aircraft gun and the cradle, the effect of clearance on the muzzle vibration response is investigated. Additionally, it can be seen that reducing the slide clearance can improve the firing accuracy of the aircraft gun while ensuring the machining assembly and mechanism movement.
Summary and Prospect of Artillery Recoil Reduction Technology
Authors: Shen Qing-ming , Wang Guo-bo , Zhao Jian-zhong , Meng Chao , Yuan Yong-qiang , Wang Er-liang 
Published: May 2023

Abstract
Modern warfare has an urgent need for high-mobility and powerful artillery. However, the mobility and power of artillery are a contradiction. Recoil reduction technology is an important technical way to solve the contradiction between mobility and power. At present, there are many types of recoil reduction technologies, and the technical maturity and engineering application value of various technologies are different. For the development of new high-mobility and high-power artillery, which recoil reduction technology to adopt is a challenge. This article classifies and researches recoil reduction technology from the perspective of recoil energy dissipation. Based on the research and comparison of the basic principles, technical characteristics and application prospects of recoil reduction technology, it is concluded that the soft recoil technology using the principle of external neutralizing momentum is the best technical approach for the artillery system to realize high-mobility and high-power, where the potential application prospects of this technology in direct-target weapons are analysed.
Study on the Method of Identifying Aircraft Parameters Based on Thrust Coupling
Authors: Zhang Yao , Gao Xiaobo , Qiao Hao , Mao Rui , Lou Jiang , Li Geng 
Published: May 2023

Abstract
The application of the actual flight data of aircraft into the post identification and analysis of its parameters not only helps verify the model on ballistic parameters, but is also of utmost significance for assessing the accuracy of launching missiles and projectiles. To address the issue of coupling of time-varying parameters such as thrust and mass flow, the engine parameters are separated from the aerodynamic parameters based on the ballistic model of combustion chamber. To address the issue of the intersection between constant parameters and time-varying parameters, the initial mass deviation and the thrust deviation of aircraft are obtained through the global average approach. As shown by the simulation results, this method effectively enables the identification of parameters, and has theoretical significance and practical value during engineering application.
Research on Effect of Initiation Detonation Method on Fragment Velocity Distribution
Authors: Jin Wang , Yan-wen Xiao , Ao-xin Liu , Chao Ge 
Published: May 2023

Abstract
To enhance the damage effect of focusing warhead, the investigation about the scattering behavior of focusing warhead is conducted. Based on the momentum method and the detonation wave theory, the influence of initiation detonation methods and curvature radius of the charge on fragment velocity is analyzed. The fragments velocity distribution models of the end-initiated, the center-initiated and the two ends-initiated are obtained. Numerical simulation shows that fragments velocity distribution and the propagation of the detonation wave of numerical simulation results have a good fit with the theoretical model. It is shown that fragments velocity is higher in the middle and low on both sides. When it was end-initiated, the location where the fragment velocity reaches the maximum was 18.6cm from the initiation end. When it was center-initiated, the maximum fragment velocity appeared at the center of the projectile axis. When it was two ends-initiated, the maximum fragment velocity appeared symmetric about the center line of the projectile axis. With increasing of the curvature radius of the circular charge, the maximum velocity of the fragments increased.
Study on Cable Network Design of Small Tactical Missile
Authors: Xi X W , Zheng H X , Li P , Zuo F , Yang Q , Zheng Y 
Published: May 2023

Abstract
This paper studies the cable network design of small tactical missile from two aspects: hardware design and soft design. The hardware design of cable network mainly includes the design of electrical connector, transmission line, cable sheathing and other accessories, while the soft design involves signal redundancy design, error prevention design and electromagnetic compatibility design. The research results set up a framework for the subsequent design and manufacture of cable network, which has a certain guiding significance.
Preparation and Structural Behavior of High-Performance PBO Fibers
Authors: Zhang DB , Liu ZF , Zhong WH , Qin ZM , Xiao ZX 
Published: May 2023

Abstract
To improve the dispersion ability of monomers in the high-viscosity PBO pre-polymerization system, a new large-capacity mixing paddle for PBO pre-polymerization reaction was designed. Through simulated calculation, it was found that the new mixing paddle has good dispersion effect and produced PBO polymer whose intrinsic viscosity was 37.5 dL/g, number-average molecular weight was 92700, and degree of polymerization was 396. Then the PBO fibers were prepared by the dry jet wet spinning technique. The morphology analysis showed that the PBO fibers were well formed, with a diameter of 14 µm. The infrared spectrum analysis verified the structure of PBO fibers. The mechanical test showed that the tensile strength of PBO fibers was 5.04-5.76 GPa and the elongation at break was 3.93% - 4.54%, which means they have good mechanical properties.
Analysis of the Ballistic Performance and Mechanism of Soft Bulletproof Layers under the Impact of Multiple Lead Core Bullets
Authors: Wang XC , Wang W , Peng G , Chen CX , Gao B , Feng JC , Zhang B 
Published: May 2023

Abstract
The soft bulletproof layers as key protective component of a bulletproof vest against pistol bullets, are subject to multiple bullets in both the ballistic resistance test and the real combat. To analyze the influence of multiple impacts on the ballistic performance, the ballistic tests are conducted on the soft bulletproof layers. The ballistic performance of multiple ballistic impacts is compared in the same test condition, and the influence of mechanical properties of materials, boundary effects, angular effects and structural changes caused by impact are studied. It is concluded that the ballistic protection performance of the multiply structure of soft bulletproof layers not only depends on the ballistic protection and energy absorption performance of the single-layer fabrics, but also is closely related to the ballistic protection synergy between the soft bulletproof layers; from the perspective of fibers and single-layer fabrics, the ballistic protection and energy absorption are determined by main factors such as elastic modulus, tensile strength, strength of materials and breaking strain, which also have the coupling effects; for the structural design of multiple soft bulletproof layers against lead cored bullets, it is necessary to comprehensively study the influence of mechanical properties of the projectile and target materials, boundary effects, angular effects and structures & forms on the ballistic protection performance.
Hygrothermal Ageing and Life Prediction of Carbon Fiber Composite Structural Members on an Aircraft
Authors: Zhang HY , Kong GQ , Wang ZS , Wang J , Li JY , Chen QX , Wei HZ 
Published: May 2023

Abstract
The mechanism of hygrothermal ageing of carbon fiber composite structural members was analyzed in terms of changes in appearance, infrared spectra, mechanical properties and internal structure under hygrothermal conditions. Based on ASTM F1980-07, predicted values for the storage life of the structural members were obtained. The results show that after hygrothermal ageing, the surface of the structural member remains smooth, with no exposed fibers, degradation or ageing, and that the internal structure and mechanical properties are stable. The life predictions calculated according to the standard are in good agreement with the design life of the actual members.
Research on Properties of 450°C Resistant Polyimide Composites
Authors: Gao SZ , Huang ZQ , Wang XL , Li DY , Wang J , Luo CH , Qi FJ , Xu XY , Ma KB , Yu G 
Published: May 2023

Abstract
Carbon fiber/polyimide composites were prepared by high temperature molding process with carbon fiber, 450 °C resistant polyimide resin and related additives as raw materials. Effects of prepreg resin content, porosity and post-treatment temperature on properties of composites were studied, and fracture shape was analyzed. Results show that high temperature shear properties of carbon fiber can be improved by more than 50% after removing sizing agent, and mechanical properties of composites are the best when the resin content of prepreg is (30 to 40)%. Retention rate of mechanical properties of composites is more than 90% when porosity is less than 1.5%. And mechanical properties decline sharply when porosity is greater than 2%. Carbon fiber/polyimide composites have good high temperature resistance below 450°C, and mechanical properties of composites can be improved to a certain extent after treatment at room temperature to 300°C. Fracture morphology analysis shows that high temperature mechanical properties of composites depend on heat resistance of resin and matching between resin and fiber.
Main Role of New High Strength, Toughness and Low-Density Steel in Artillery Lightweight
Authors: Hu S L , Cen Y M , Zhou H K , Tian Y J , Ma L C , Cai B , Hu J 
Published: May 2023

Abstract
The new high strength, toughness and low density steel is a new generation of lightweight material with high protection, which is based on the theory of lattice dilution and lattice distortion and is manufactured by adding light elements to reduce its density. Furthermore, after impact process, the composite effects such as transformation induced plasticity (TRIP) effect, twinning induced plasticity (TWIP) effect, microbands induced plasticity (MBIP) effect and phase transformation precipitation occur in the microstructure. The specific strength and specific stiffness are better than those of aluminum, magnesium and titanium alloys, and the modulus is 3 times that of aluminum alloy and 2 times that of titanium alloy. Preliminary research shows that the application of low density steel in artillery system can greatly reduce the production cost. On the basis that all technical and tactical indexes meet the design requirements, it can realize lightweight, long-distance strategic delivery and battlefield real-time repair.
Research on the Application of Composite Materials in Artillery Weapon
Authors: Fan T F , Zhou J Y , Tian Y F , Ma J J , Huang K 
Published: May 2023

Abstract
For artillery weapons, improving range or improving mobility is an eternal contradiction, so lightweight design is the key method to solve this contradiction. The application of composite material can improve the degree of artillery lightening and enhance the comprehensive combat effectiveness of artillery, so as to adapt to the requirements of modern war. This paper analyzed the characteristics, performances and capable application areas of common-used composite materials in artillery, and introduced its recent applications both home and abroad in barrels, turrets and other structural parts, and focused on the research on design methods and key technologies of its applications in self-propelled artillery. It can be taken as a guide in reasonable application of composite materials in artillery weapons.
Research of Ceramic Aluminum New Material and Its Application on Certain Naval Gun
Authors: Liu D , Meng C , Ma C , Yuan Y Q , Gu Z Y , Han R F , Gao Y 
Published: May 2023

Abstract
The ceramic aluminum new material is a kind of high performance material, which has attracted much attention due to their excellent properties such as high elastic modulus, good wear-resistance and high strength. These properties have made ceramic aluminum materials attractive candidates for various application fields. As the weapons equipments have entered the golden development period, the demand for high performance composite materials is crucially strong. It was estimated that the new materials was used to produce the brackets and cradles on certain naval gun, which account for more than 31% of all gun materials. The results showed that the properties of the ceramic aluminum new material were better than those of the conventional cast aluminum and matrix aluminum alloy. Under the condition of the same structure, the weight of the ceramic aluminum new material was about 6.5% and the maximum deformation was about 15.5% less than that of the ordinary aluminum alloy. Under the condition that the maximum deformation was basically the same and the stress was not considered, the weight of ceramic aluminum alloy was about 6.3% less than that of the ordinary aluminum alloy.