bluuebunny/crossref_metadata_2025_split huggingface dataset:
Calculation and optimization of lethal power of controlled fragmentation warheads with diamond notch grid
Authors: Li Guanqun , Li Xiangdong , Zhou Lanwei , Ji Yangziyi 
Published: June 2023

Abstract
The lethal power is the critical design index of the explosive warhead, mainly related to the number and mass of fragments formed by the warhead case. For the controlled fragmentation warhead case containing notches, the notch depth and spacing are the main factors affecting the fragment formation. This paper analyzes the influence of the notch number and depth on the network of fracture trajectories. It establishes a calculation model for the mass and number of fragments of warheads with various groove parameters. The lethal radius is obtained from the calculated fragment data and compared with the results of the experimental data and numerical simulation. The paper uses the genetic algorithm to obtain the optimal solution under various design variables, taking the groove depth and the number of circumferential grooves as the design variables and the lethal radius as the optimization objective. The optimized result is higher than without optimization.
Research on the ability of artillery-launched laser beam-guided artillery projectiles to counter high-speed dive and large-wall thickness guided munitions
Authors: Cheng Guang-wei , Chen Chen , Wang Hua-ting 
Published: June 2023

Abstract
Aiming at the typical high-speed dive high-thickness guided munitions air attack problem, according to the shooting characteristics and typical target characteristics of a vehicle-mounted medium-caliber anti-aircraft gun compatible with laser beam-guided projectiles, the impact of the long-distance shooting of artillery-guided projectiles on the hit probability was analyzed. The main factors are the simulation calculation of the shooting probability of the weapon system; the plan of the shaped warhead for the anti-high-speed dive with large wall thickness guided munitions is proposed, and its LS-DYNA simulation model is established. The K-level damage of the thick wall thickness guided munition provides a technical approach for the future anti-high-speed dive thick wall thickness guided munition, as well as CRAM (anti-artillery, rocket and mortar shells).
Influence of Initiation Diameter on Formation of Collinear EFP with Fins from Warhead with Double Layer Liners
Authors: Zhang Kun , Zhao Chang-xiao , Ji Chong , Tu Wan-peng , Xin Wang , Liu Kai 
Published: June 2023

Abstract
To improve the aerodynamic performance of collinear EFP from warhead with double layer liners, the forming process of collinear EFP with fins and the effect of the initiation diameter on the formation of collinear EFP with fins under four-point initiation was analyzed by using LS-DYNA software. The results showed that it could form symmetrical and uniform fins at the tail of collinear EFP by using multi-point initiation, which effectively improved the aerodynamic performance of collinear EFP. The impact of initiation diameter on forming parameters of collinear EFP with fins was mainly reflected in the shape parameters but had little influence on the velocity. The initiation diameter was bigger, the length-diameter ratio γ and wingspan-diameter ratio β of the front EFP increased linearly while the wingspan and wingspan-diameter ratio β of the rear EFP decreases, and the reduction rate decreased gradually.
Numerical Simulation of Hypervelocity Launch Process of Cased Telescoped Ammunition Armor-piercing Projectile
Authors: Guo J T , Zhang X W 
Published: June 2023

Abstract
In order to study the interior ballistic characteristics of cased telescoped ammunition (CTA) armor-piercing projectile in the hypervelocity launch process, in this paper, based on the secondary ignition and propellant combustion technology, the zero-dimensional internal ballistic model of CTA is established. At the same time, in order to improve the lightweight of CTA and the energy utilization rate of the launch process, combustible cartridge materials are applied to the structure of cased telescoped ammunition. Numerical simulation of 105 mm CTA grenade shooting experiment has verified its correctness. On this basis, the internal ballistic process of 105 mm CTA armor-piercing projectile with semi-combustible cartridge is predicted and analyzed. When main charge propellant weight is 6 kg, the maximum pressure is 569.5 MPa and the muzzle velocity can reach 1702 m/s.
From the development of shipborne laser weapon of U.S. navy to analyze the military requirements and countermeasures of navy
Authors: Zhang Hetian , Zeng Yaqin , Sun Shiya 
Published: June 2023

Abstract
In recent years, U.S. navy is exposing frequently some tests and development about shipborne laser weapon, which have attracted aboard attention and passionate discussion. In this paper, the review on shipborne laser weapon of U.S. navy from the 21th century is summed up. Some oppugns or baffles are also analyzed in this process. The meaning on developing shipborne laser weapon is discussed more deeply. Furthermore, some advices are put forward.
Three-dimensional magneto-thermo-mechanical coupling analysis with the influence of velocity skin effect
Authors: Wang Dexiang , Li Baoming , Li Haiyuan 
Published: June 2023

Abstract
In this paper, the three-dimensional magnetic diffusion governing equations of an electromagnetic railgun are derived based on Maxwell’s equations and coupled with the energy equations. The finite element method is used to calculate the current density, temperature, and electromagnetic force distribution for armature velocities of 0, 200, 600, and 1200 m/s. The results show that there is a current concentration phenomenon on the rail’s inner surface and the trailing edge of the contact interface; the temperature rise of the rail along the moving direction of the armature tends to decrease, and ablation occurs at the corner of the moving armature’s trailing edge. An increase in the velocity of armature movement results in an increase in the electromagnetic forces on the armature and contact surface. This model can effectively represent the variation of each physical quantity with velocity and provide direction for the optimal design of the rail and armature.
A Review of the Computational Investigation of Three-Dimensional Transient Magneto-Thermal Coupling Characteristics of Electromagnetic Railgun Armature and Rail in High-Speed Sliding Electrical Contact
Authors: Gu Benfeng , Yang Chunxia 
Published: June 2023

Abstract
In order to investigate the dynamic process of electromagnetic field distribution, temperature change and the deformation during the launching process of electromagnetic railgun. It is necessary to conduct a three-dimensional coupled electromagnetic-temperature-structure analysis of the rail and armature, which requires the establishment of the corresponding multi-physics field model and the use of appropriate software and algorithms to complete the relevant simulation calculation and solution results. Based on this, this paper summarizes the current domestic and foreign research methods for multi-physics field characteristics under sliding electrical contact conditions, analyses the advantages and disadvantages of each method, and focuses on the updates of the three-dimensional finite element program EMAP3D based on Lagrangian description and the advantages of multi-field coupling. Finally, several considerations and operable spaces for multi-physics field coupling simulation are summarized to provide technical support for subsequent studies on multi-physics field characteristics for high-speed sliding electrical contact condition.
A review of static/quasi-static calculations of Electromagnetic-thermal coupling sliding electrical contact characteristics of armature and rails
Authors: Xu Gang 
Published: June 2023

Abstract
The analysis of the sliding electrical contact characteristics between the armature and rails is an important research area for electromagnetic railguns. In this paper, a sliding electrical contact model considering non-ideal factors is introduced, the magneto-thermal coupling characteristics of the contact interface are summarized, and the current and temperature distribution characteristics are outlined. In the end, measures that can be taken to improve the contact performance are presented in terms of armature rail material selection and structural optimization.
Study on discharge characteristics of pulsed power module under the condition of discharge short circuit fault
Authors: Liu Jian , Wang Zhang-fei , Minhao-Zhong  , Li Bao-ming 
Published: June 2023

Abstract
Efficiency and safety are key factors that must be emphasized in pulsed power applications. The discharge characteristics of pulsed power supply directly determine the performance of the railgun. This paper conducts a research on short-circuit faults in transmission coaxial cables of pulsed power supply. In order to study the effect of short-circuit fault on the discharge characteristics of pulsed power supply and system efficiency,a pulse-forming network with cable short-circuit failure and dynamic railgun model are established in the paper. The effect of short-circuit fault on peak current is discussed by simulation. The results show that the short-circuit fault currents are all higher than the currents under normal conditions, and the closer the short-circuit location is to the power supply side, the higher the peak value of current is. In some extreme case, the peak fault current exceeds 1.5 times the normal, which requires consideration of short-circuit fault protection measures, such as the addition of a DC circuit breakers.
Timing control of impulse self balancing latch opening of expansion wave gun
Authors: Zheng Dou , Hongjin Wang , Junmou Qiao , Yongcun Wang 
Published: June 2023

Abstract
Aiming at the problem of accurate latch opening control of expansion wave gun automatic gun, the mathematical model of accurate latch opening time is established, the travel curve of projectile and expansion wave, the velocity curve of projectile and expansion wave are studied, and the occurrence time of expansion wave and the time close to projectile are simulated and analyzed; The time-space evolution relationship between expansion wave velocity and local sound velocity, projectile velocity and gas velocity is simulated; The average pressure time curve and chamber resultant force curve of the two launch modes are compared and analyzed. After the projectile moves for 2.7ms, the chamber pressure and chamber resultant force of expansion wave launch are significantly reduced; The dynamic model of inertial latch opening is established; The changes of projectile initial velocity and recoil force under different latch opening times are studied. The test shows that the recoil force and recoil distance are greatly reduced when the projectile initial velocity decreases very weakly, which shows that the simulation calculation of latch opening time is accurate.
Parametric analysis and design of the initial contact state of a 400kA pulsed current C-armature
Authors: Liu Jingang , Jiang Yi , Su Zizhou , Ye Weisheng , Zhang Tao , Wang Wanying 
Published: June 2023

Abstract
As a key component of an electromagnetic rail launcher, the armature plays a vital role in the performance of the electromagnetic launch. In order to solve the contact area and structural design problems of C-type armatures under large pulse current conditions, the material and initial contact state of a certain calibre C-type armature are studied, and the initial structural parameters of C-type armatures under 400kA through-current capacity and four times the calibre loading position constraints are analysed and calculated, together with the contact characteristics of armatures made of 6061-T6 and 7075-T6 aluminium alloys, to form At the same time, the parametric design of the C-type armature was carried out on the basis of the initial structural parameters, and the variation laws of contact stress, contact deformation, preload force and contact area were studied for different armature lengths, armature tail thickness, armature throat thickness and armature head height, with the encore law, contact area and plastic deformation stress as The structural dimensions of the C-type armature for a 400 kA pulse current are determined, providing a direction for the structural optimisation of subsequent large pulse current C-type armatures.
Design and Research of Missile launcher Drive System for Anti-aircraft Gun and Missile Weapon System
Authors: Wang Yan , Zhou Jia-yong , Meng Xiao-jing , Lei Kai-wen 
Published: June 2023

Abstract
Aiming at the problems of large size and weight of electric cylinder, low efficiency and large pressure fluctuation of centralized hydraulic drive system, a drive system of anti-aircraft gun and missile weapon system based on electro-hydrostatic actuator is designed. The working principle of the hydraulic system of electro-hydrostatic actuator is discussed, its components are selected and designed, the micro cartridge hydraulic control check valve is designed and the electro-hydrostatic actuator is analyzed and integrated structure is designed;The simulation model is established by AMEsim software. The simulation results show that the electro-hydrostatic actuator can move the missile driving device to the highest position within 2s, meet the working requirements, and have certain guiding significance for the research and development of missile launcher driving.
Development status of anti UAV swarm and analysis of new defense system
Authors: Tianfeng Fan , Xiaojing Meng , Chi Zhang 
Published: June 2023

Abstract
UAV swarm is gradually becoming a comprehensive new weapon platform integrating electronic countermeasure, information attack and defense and firepower attack. It has become an important form of future combat, and also gave birth to the rapid development of anti UAV swarm system. Aiming at the problem that UAV is developing rapidly and becoming an important threat in the battlefield, the characteristics of typical UAV swarm system level targets are analyzed. The main means of counteracting UAV swarm, such as air defense missile, anti-aircraft gun / missile gun combination, high-energy laser and high-power microwave, are studied, and the counteraction performance is compared and analyzed. A new air anti UAV interception system based on UAV mounted micro recoil automatic gun is proposed, and the architecture, combat concept and process, key technologies and innovations involved are studied, which provides a technical reference for strengthening the ability of anti UAV system.
Application research of gun servo system based on Stribeck friction model
Authors: Pan Jun , Dai Pu , Ma Qing , Liu Miao , Yang Zhizhong , Lei Shuyao 
Published: June 2023

Abstract
The gun servo system has strong friction resistance moment. The traditional solution is to reduce the influence of friction disturbance on system control through speed closed-loop. The disadvantage of this method is that the control accuracy of the system is not high due to the lag effect of feedback. To solve this problem, based on the analysis of the composition and working principle of the gun servo system, the friction data of the servo system is obtained through the test, the Stribeck friction model of the system is identified by the method of curve fitting, and the disturbance of the friction torque is compensated and controlled by the control method of feedforward compensation based on disturbance. The simulation results show that this method has good compensation and control ability for the disturbance of friction resistance moment. After using this method, the dynamic tracking accuracy and control performance of the system are greatly improved.
Status and Prospect of Land-based Delivery Platform Technology for Artillery Weapons
Authors: Tianfeng Fan , Hongqing Liu , Cheng Huang , Zheng Wang 
Published: June 2023

Abstract
Land-based delivery platform technology for artillery weapons is a comprehensive technology to study the adaptability of artillery weapon and land-based delivery platform, and its function is to is to provide transportation and loading platform for artillery and realize tactical mobility and battle mobility of artillery. This paper reviews the important technical progress of China’s artillery weapons in land-based delivery platform technology, contrasts and analyses the research progress at home and abroad, and outlooks the development trend and countermeasures in the field of land-based delivery platform technology for China’s artillery weapons.
Analysis and experimental study on dynamic characteristics of key joint of helicopter gun
Authors: Xiao-ke Gao 
Published: June 2023

Abstract
The dynamic characteristics of the key combined structure of helicopter and helicopter gun have an important impact on the matching between helicopter and helicopter gun. In the research process of impact load transmission, firing accuracy and reliability, the characteristics of the joint is an important factor to be considered in structural modelling, analysis and optimization. In this paper, the dynamic characteristics of the joint of the gun seat ring, bracket and trunnion are studied by combining experimental and theoretical analysis. Through the modal analysis of the structure, the natural frequencies and vibration modes of the key joint are obtained, which provides a theoretical and experimental basis for the matching of the impact load and the natural characteristics of the structure and the optimization of the impact response in the firing process of the gun.
Launching Process Analysis of Aircraft Gun with Closed Type Gas Reflection Device
Authors: Luo D , He F , Dai J S , Wang M S , Su X P , Lin S Y 
Published: June 2023

AbstractRecoil reduction is one of the most important issues for the design of aircraft gun. Traditional approaches for this purpose will produce back-blast, which constitutes a hazard to fighter planes or attack helicopters. This paper presents a closed type gas reflection device for the aircraft gun aiming to reduce the recoil force without ejecting the propellant gas rearward. The launching process is modeled by coupling the classical interior ballistic model and the flow equations for the closed type gas reflection device. The fourth order Runge-Kutta method is adopted to solve the modified interior ballistic model to obtain the recoil efficiency of the closed type gas reflection device. On this basis, effects of various parameters on the recoil efficiency and muzzle velocity are studied systematically. Finally, shooting experiments are carried out upon a 30mm caliber aircraft gun. The simulated results agree well with the experiment ones. The results show that, by using the closed type gas reflection device, the recoil efficiency of 26.01% is attained without ejecting the propellant gas rearward, nor decreasing the muzzle velocity dramatically.
Research on the Stiffness Characteristics of the Rotary Structure of the Cannon
Authors: Shen Y L , Liu B , Liu D , Wang K Z 
Published: June 2023

Abstract
With the increasing requirements for the lightweight of the cannon, it is necessary to design the corresponding structure according to the specific load-bearing form of the cannon to ensure that the purpose of weight reduction can be achieved on the premise of meeting a certain rigidity. In this paper, for the cannon bracket, its structural form is simplified as a disk and double arms, and four characteristic variables of disk thickness, inclined length, straight arm thickness and curved arm thickness are obtained by extracting characteristic dimensions. According to the previous design experience, the feature size scheme design table is obtained. Models with different feature sizes were simulated and analyzed by the control variable method, and the effects of different feature sizes on the structural stiffness were explored. After analysis, it is found that the increase of the thickness of the disk, the decrease of the inclined length, and the increase of the wall thickness can improve the rigidity of the structure. And under the same thickness, the curved arm has better torsional stiffness than the straight arm, which can be increased by 15.2% on average. While the rigidity is improved, the requirements of light weight are realized. It provides a reference for the stiffness design of the double-arm structure that mainly bears the rotational torque.
Analysis of the acceleration of the multi-level vibration of the tank as firing
Authors: Liu J , Xu H Y , Heng G 
Published: June 2023

Abstract
Aiming at the system level vibration problem caused by the strong impact load during the tank firing, the tank is divided into several levels according to the vibration transmission path, such as barrel, cradle, turret, seat ring, car body and wheel. The multi-level vibration response characteristics of the tank during firing are obtained by arranging acceleration sensors at the typical positions of each level. Based on the time domain analysis method, the vibration acceleration at the positions of cradle, turret, seat ring, car body and wheel is analyzed, and the pulse amplitude and pulse time of vibration acceleration at each level are obtained. The analysis shows that under the action of firing load, the acceleration amplitude of muzzle, cradle, turret, seat ring, vehicle body and wheel decreases in turn. And the peak acceleration at the muzzle position is the largest, about 1400g, and the peak acceleration at the wheel position is the smallest, about 0.6g. The results will provide support for obtaining the multi-level vibration characteristics of the tank under the fire load and revealing the vibration transmission law of the tank under the fire load.
key technology and application of gun agile optimization design based on dynamic simulation
Authors: Xu Y F , Gu B , Shan C L , Liu P K 
Published: June 2023

Abstract
The new generation of artillery equipment is showing the development trend of lightweight, long-range, intelligent et al. However, the traditional development mode based on physical prototype test cannot meet these needs of equipment development. In the development, there are some problems, such as lack of systematic guidance in the overall design scheme, low degree of digitalization and parameterization of the model, and long period of serial iterative development, which need to be solved by optimization design. Parametric modeling technology, hard point driven template model technology and structural optimization design technology are briefly introduced, which are the foundation of equipment optimization design. These key technologies, combined with the overall scheme design, chassis system design and ammunition loading timing optimization design of a large-caliber tracked self-propelled gun, showing the basic development route of artillery performance improvement. The optimization design of artillery type equipment are summarized in recent years, which provide reference for other similar work.