Defence Technology(防务技术)最新文献_第3页

Ta content-dependent phase evolution and corrosion resistance of ZrTiHfTax high-entropy alloys in 3-nitro-1,2,4-triazol-5-one (NTO) medium ZrTiHfTax高熵合金在3-硝基-1,2,4-三唑-5-one （NTO）介质中Ta含量相关的相演化及耐蚀性

IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY

Defence Technology(防务技术)

Pub Date : 2026-03-01 Epub Date: 2025-10-30 DOI: 10.1016/j.dt.2025.10.034

Ziyang Guo , Zhe Zhang , Zhuowei Sun , Yujie Qiang , Yansong Shi , Xijuan Lv , Qinghai Shu

High-entropy alloys (HEAs) have emerged as promising candidates for energy structural materials (ESMs) due to their superior mechanical properties and compositional flexibility. However, their corrosion resistance in contact with energetic materials, particularly NTO, a widely used insensitive high explosive, remains insufficiently understood. In this study, a series of ZrTiHfTa_x HEAs with varying Ta contents were fabricated via vacuum arc melting to explore the effect of Ta content on microstructural evolution and corrosion resistance in aqueous NTO solution. X-ray diffraction (XRD) and transmission electron microscopy (TEM) analyses revealed a composition-induced phase transformation from a dual-phase HCP + BCC structure at low Ta content to a single-phase BCC structure at higher Ta concentrations. Electrochemical measurements demonstrated that increasing Ta content markedly enhanced corrosion resistance; the corrosion current density of the Ta_1.00 HEA was 44.57% of that of the Ta_0.25 HEA. Moreover, X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS) indicated that higher Ta content facilitated the formation of a denser and more compact passive film with reduced defect density. Density functional theory (DFT) calculations further revealed that the passive layer provides dual protection effects by physically hindering H⁺/NTO⁻ ingress and chemically suppressing nitro group dissociation and substrate oxidation. This work offers fundamental insights into the corrosion protection mechanisms of HEAs in NTO-containing environments and provides valuable guidance for the rational design of corrosion-resistant HEAs.

高熵合金（HEAs）由于其优异的力学性能和组成柔韧性而成为能源结构材料（esm）的有希望的候选材料。然而，它们与含能材料，特别是与NTO（一种广泛使用的不敏感高炸药）接触时的耐腐蚀性仍然不够了解。本研究通过真空电弧熔炼制备了一系列不同Ta含量的ZrTiHfTax HEAs，探讨了Ta含量对NTO水溶液中组织演变和耐腐蚀性的影响。x射线衍射（XRD）和透射电镜（TEM）分析表明，在Ta含量较低时，HCP + BCC为双相结构，在Ta含量较高时为单相结构。电化学测量表明，增加Ta含量可显著提高材料的耐蚀性；Ta1.00 HEA的腐蚀电流密度是Ta0.25 HEA的44.57%。此外，x射线光电子能谱（XPS）和飞行时间二次离子质谱（ToF-SIMS）分析表明，较高的Ta含量有助于形成更致密、更紧凑的钝化膜，缺陷密度降低。密度泛函理论（DFT）计算进一步表明，被动层具有双重保护作用，物理上阻止H+/NTO−的进入，化学上抑制硝基解离和底物氧化。本研究为深入了解含nto环境中HEAs的防腐机理提供了基础，为合理设计耐腐蚀HEAs提供了有价值的指导。

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引用次数: 0

Research on ballistic performance of 3D woven fabrics with hybrid binding yarn structures 混合结合纱结构三维机织物的弹道性能研究

IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY

Defence Technology(防务技术)

Pub Date : 2026-03-01 Epub Date: 2025-09-30 DOI: 10.1016/j.dt.2025.09.039

Hao Wu , Xingyu Shen , Jizhe Wang , Ke Yan , Mengqi Yuan , Qi Zhang

With superior structural integrity and design flexibility, 3D woven fabrics exhibit unique potential in ballistic protection applications. However, the anisotropic yarn distribution renders traditional 3D woven fabrics susceptible to fixed boundaries, which is not conducive to practical applications. Inspired by the motion characteristics of yarn structures, this study investigates a hybrid 3D woven fabric structure that incorporates interlayer warp yarns and normal yarns. Bending stiffness tests, yarn pull-out tests, and ballistic tests are conducted and compared with single-binding yarn structures. Utilizing a validated meso-finite element model, the dynamic deformation and energy absorption mechanisms of the hybrid configuration under impact are elucidated. The results demonstrate that synergistic interactions among various binding yarn structures maintain fabric stability in the absence of boundaries. Normal yarns inhibit horizontal slippage of warp yarns, while multi-layer warp yarns enhance resistance to weft yarn pull-out, thereby facilitating greater yarn participation in direct energy absorption. The hybrid structure exhibited the highest specific energy absorption (SEA) across different boundary conditions, with an average SEA increase of approximately 27%. These insights will facilitate the design of novel hybrid-structured 3D woven fabrics and inform the customization of lightweight protective materials.

具有优越的结构完整性和设计灵活性，3D机织织物在弹道防护应用中表现出独特的潜力。然而，纱线的各向异性分布使得传统的三维机织物容易受到固定边界的影响，不利于实际应用。受纱线结构运动特性的启发，本研究研究了一种结合层间经纱和普通纱的混合三维机织物结构。对单束纱线结构进行了抗弯刚度试验、纱线拉拔试验和弹道试验，并进行了对比。利用经过验证的细观有限元模型，阐明了混合结构在冲击作用下的动态变形和能量吸收机理。结果表明，在没有边界的情况下，各种结合纱结构之间的协同作用保持了织物的稳定性。普通纱线抑制经纱水平滑移，而多层经纱增强经纱抗纬纱拉出的能力，从而使纱线更大程度地参与直接吸能。杂化结构在不同边界条件下的比能吸收（SEA）最高，平均增加约27%。这些见解将促进新型混合结构3D机织织物的设计，并为定制轻质防护材料提供信息。

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引用次数: 0

Effects of carbon dots and their composites on the burning performance of HMX-CMDB propellant 碳点及其复合材料对HMX-CMDB推进剂燃烧性能的影响

IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY

Defence Technology(防务技术)

Pub Date : 2026-03-01 Epub Date: 2025-10-16 DOI: 10.1016/j.dt.2025.10.011

Zhen Zhang, Yang Zhang, Yifan Jiang, Weiqiang Pang, Hongxu Gao, Zhifeng Yuan, Libai Xiao, Qingshan Fu, Qing Pei, Shiyao Niu, Yu Fu, Fengqi Zhao

Designing efficient, stable dual-functional combustion catalysts remains a key challenge in developing next-generation solid propellants, particularly in achieving wide pressure plateau combustion. Herein, we synthesize a series of carbon dot-based catalysts (CDs-1, CDs-2, CDs/Cu) via oxidative etching and hydrothermal methods, and employ them to replace conventional carbon black (CB) at 0.65 wt% loading in the preparation of HMX-CMDB propellants. Systematic evaluation through combined thermochemical analysis (50–350 °C), laser ignition diagnostics (50–350 W/cm²), and combustion chamber testing (4–18 MPa) reveals remarkable catalytic enhancements. The optimized CDs/Cu catalyst demonstrates multifunctional superiority: (1) 7.4 °C reduction in HMX-CMDB decomposition temperature at 10 °C/min (from 205.2 °C to 196.0 °C); (2) 66.7% decrease in laser ignition delay (from 45 ms to 15 ms); (3) 190.9% burning rate increase at 4 MPa (from 4.61 mm/s to 13.41 mm/s); (4) lower pressure exponent of 0.02 within 4–18 MPa range. Notably, CDs-1 induces stable "Plateau" combustion (4–14 MPa), while CDs/Cu achieves "Mesa" effects (8–12 MPa) via synergistic thermal feedback mechanisms-both phenomena ensure stable operation of the engine. Mechanistic studies integrate thermochemical kinetics, ignition combustion process, combustion flame structure, and combustion wave temperature distribution trends, which establish a new paradigm for the study of high efficiency combustion catalysts for solid propellants.

设计高效、稳定的双功能燃烧催化剂仍然是开发下一代固体推进剂的关键挑战，特别是在实现宽压力平台燃烧方面。本文采用氧化刻蚀法和水热法合成了一系列碳点基催化剂（CDs-1、CDs-2、CDs/Cu），并以0.65 wt%的负荷量取代传统的炭黑（CB）用于制备HMX-CMDB推进剂。通过综合热化学分析（50-350°C）、激光点火诊断（50-350 W/cm2）和燃烧室测试（4-18 MPa）的系统评估，发现了显著的催化增强作用。优化后的CDs/Cu催化剂具有多功能优势：(1)HMX-CMDB在10°C/min下分解温度降低7.4°C（从205.2°C降至196.0°C）；(2)激光点火延迟减少66.7%（从45 ms减少到15 ms）；(3)在4 MPa下燃烧速率提高190.9%（从4.61 mm/s提高到13.41 mm/s）；(4) 4 ~ 18mpa范围内压力指数降低0.02。值得注意的是，CDs-1可诱导稳定的“平台”燃烧（4-14 MPa），而CDs/Cu可通过协同热反馈机制实现“台地”燃烧（8-12 MPa），这两种现象均可确保发动机的稳定运行。机理研究结合热化学动力学、点火燃烧过程、燃烧火焰结构、燃烧波温度分布趋势，为固体推进剂高效燃烧催化剂的研究建立了新的范式。

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引用次数: 0

A backstepping adaptive control scheme with prescribed asymmetric performance guarantees for large-calibre artillery servo follow-up systems 大口径火炮伺服随动系统具有非对称性能保证的后退自适应控制方案

IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY

Defence Technology(防务技术)

Pub Date : 2026-03-01 Epub Date: 2025-09-18 DOI: 10.1016/j.dt.2025.09.015

Qiyang Zhao , Long Zhang , Minghao Tong , Longmiao Chen , Hongbin Chen

The increasing demand for artillery firepower, coupled with the growing size of gun barrels, imposes significant challenges on servo system performance. To address these challenges while ensuring fast and stable response, this paper proposes an adaptive robust controller based on an asymmetric barrier Lyapunov function (ABLF). The controller design incorporates both load and driver states through a backstepping synthesis. The overshoot and lag of barrel position errors are constrained within asymmetric boundaries, accounting for complex rotational uncertainties via an adaptive law and linear extended state observers (LESO). Simulations and experiments under typical artillery operating conditions validate the effectiveness and dynamic tracking performance of the proposed control strategy in comparison with other methods.

火炮火力需求的增加，加上炮管尺寸的增加，对伺服系统的性能提出了重大挑战。为了在保证快速稳定响应的同时解决这些问题，本文提出了一种基于非对称屏障Lyapunov函数（ABLF）的自适应鲁棒控制器。控制器设计通过反步合成将负载和驱动状态结合在一起。通过自适应律和线性扩展状态观测器（LESO），将枪管位置误差的超调量和滞后量约束在非对称边界内，以解释复杂的旋转不确定性。在典型火炮作战条件下的仿真和实验，与其他控制方法相比，验证了所提控制策略的有效性和动态跟踪性能。

引用次数: 0

Arginine-derived inhibitor-based anticorrosion coating for carbon steel in 3-nitro-1,2,4-triazol-5-one (NTO) medium: Integration of experimental and multiscale simulations 碳钢在3-硝基-1,2,4-三唑-5- 1 （NTO）介质中的精氨酸衍生缓蚀剂防腐涂层：实验和多尺度模拟的集成

IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY

Defence Technology(防务技术)

Pub Date : 2026-03-01 Epub Date: 2025-10-04 DOI: 10.1016/j.dt.2025.09.042

Ziyang Guo , Zhe Zhang , Shuai Zhao , Manman Wang , Yujie Qiang , Qinghai Shu

As a representative insensitive high explosive, 3-nitro-1,2,4-triazol-5-one (NTO) has garnered significant attention due to its ability to substantially reduce the risk of accidental detonation in munitions. However, its inherent acidity induces severe interfacial corrosion of metal casings, thereby limiting its engineering applications. Based on the micro-corrosion mechanism of NTO on carbon steel (CS), this study designs an arginine-derived corrosion inhibitor, N2-[(phenylamino)thioxomethyl]-arginine (PTA). Electrochemical tests reveal that PTA exhibits an outstanding corrosion inhibition efficiency of 98.0% in NTO solution. Density functional theory (DFT) and molecular dynamics (MD) simulations elucidate the inhibition mechanism of PTA, demonstrating that it not only co-adsorbs with NTO⁻ onto the CS surface to form a dense and stable protective film but also disrupts the strong interactions between NTO⁻ and Fe, thereby suppressing nitro group-induced reduction, decomposition, and excessive surface oxidation. Furthermore, a PTA-loaded mesoporous silica (mSiO₂) nanoparticles (NPs)-reinforced epoxy resin (EP) composite coating was constructed. Benefiting from the enhanced barrier properties of PTA@mSiO₂ NPs and the synergistic effect between PTA and NTO⁻, the low-frequency impedance of the composite coating remained as high as 1.29 × 10⁹ Ω·cm² after 30 days of immersion in NTO solution, exhibiting a two-order-of-magnitude improvement compared to the pure EP coating. This study proposes an effective corrosion control strategy to mitigate NTO-induced corrosion, providing insights into the development of advanced corrosion protection strategies for broader applications.

作为一种具有代表性的不敏感高爆药，3-硝基-1,2,4-三唑-5-酮（NTO）因其能够大大降低弹药意外爆炸的风险而受到极大关注。然而，其固有的酸性会对金属套管造成严重的界面腐蚀，从而限制了其工程应用。基于NTO对碳钢（CS）的微腐蚀机理，设计了精氨酸类缓蚀剂N2-[（苯胺）硫氧甲基]-精氨酸（PTA）。电化学测试表明，PTA在NTO溶液中的缓蚀效率为97.96%。密度泛函理论（DFT）和分子动力学（MD）模拟阐明了PTA的抑制机制，表明它不仅与NTO -共同吸附在CS表面形成致密稳定的保护膜，而且破坏了NTO -与Fe之间的强相互作用，从而抑制了硝基诱导的还原、分解和表面过度氧化。在此基础上，构建了负载pta的介孔二氧化硅纳米颗粒增强环氧树脂复合涂层。得益于PTA@mSiO 2 NPs的阻隔性能增强以及PTA和NTO -之间的协同效应，在NTO溶液中浸泡30天后，复合涂层的低频阻抗仍然高达1.29 × 10 9 Ω·cm 2，与纯EP涂层相比，提高了两个数量级。本研究提出了一种有效的腐蚀控制策略来减轻nto引起的腐蚀，为更广泛应用的先进腐蚀保护策略的发展提供了见解。

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引用次数: 0

Development of silicon carbide fiber-reinforced silicon oxycarbide composites for low-observable unmanned aerial vehicle exhaust nozzles via filament winding, and polymer infiltration and pyrolysis 利用长丝缠绕、聚合物渗透热解制备低可观测无人机排气喷嘴用碳化硅纤维增强碳化硅氧复合材料

IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY

Defence Technology(防务技术)

Pub Date : 2026-02-01 Epub Date: 2025-09-02 DOI: 10.1016/j.dt.2025.09.001

Byeong-Joo Kim , Ji Eun Lee , Chang-Bin Oh , Doo Hyun Choi , Man Young Lee , Dae Young Jo , Shin Kim

Unmanned combat aerial vehicles require lightweight, stealth-capable exhaust systems. However, traditional metallic nozzles increase radar detectability and reduce range, while advanced composites offer high performance but are expensive. Therefore, to improve the operational range and survivability of unmanned combat aerial vehicles, a lightweight, high-temperature-resistant, oxidation-resistant, and low-observable composite exhaust nozzle is developed to replace conventional metallic straight-type nozzles. The nozzle features a double serpentine shape to reduce radar and infrared signatures and is manufactured as a monolithic structure using the filament winding process, accommodating the complex geometry and large size (length: 1.8 m, width: 0.8 m). The exhaust nozzle consists of a ceramic matrix composite made of silicon carbide fibers and a silicon oxycarbide matrix, which absorbs and scatters radio frequency signals while withstanding prolonged exposure to high-temperature (700 °C) oxidizing environments typical of engine exhaust gases. The polysiloxane resin used to produce the silicon oxycarbide matrix poses significant challenges owing to its low tackiness and high viscosity variations depending on the presence of nanoparticles, making filament winding difficult. These challenges are addressed by optimizing resin viscosity and winding pattern design. As a result, the tensile strength of the composite specimens fabricated with the optimized viscosity increases by 228.03% before pyrolysis and 97.68% after pyrolysis, compared with that of the non-optimized specimens. In addition, the density and tensile strength of the composite processed via three cycles of polymer infiltration and pyrolysis increased by 13.08% and 80.37%, respectively, compared to those of the non-densified composite. High-temperature oxidation and flame tests demonstrate exceptional thermal and oxidative stability. Furthermore, when compared with carbon fiber-reinforced ceramic matrix composites, the developed composite exhibits a permittivity at least two levels lower and a reflection loss below −7 dB within the frequency range of 9.3–10.9 GHz, underscoring its superior electromagnetic stealth performance.

无人作战飞机需要轻型、隐身的排气系统。然而，传统的金属喷嘴提高了雷达的可探测性，减少了射程，而先进的复合材料提供了高性能，但价格昂贵。因此，为了提高无人作战飞行器的作战范围和生存能力，研制了一种轻量化、耐高温、抗氧化、低可观测性的复合排气喷嘴，以取代传统的金属直管式喷嘴。喷嘴的特点是双蛇形形状，以减少雷达和红外信号，并使用长丝缠绕工艺作为整体结构制造，适应复杂的几何形状和大尺寸（长：1.8米，宽：0.8米）。排气喷嘴由碳化硅纤维和氧化碳化硅基体制成的陶瓷基复合材料组成，可以吸收和散射射频信号，同时承受长时间暴露在高温（700°C）氧化环境中典型的发动机废气。用于生产氧化碳化硅基体的聚硅氧烷树脂面临着巨大的挑战，因为它的低粘性和高粘度变化取决于纳米颗粒的存在，使得长丝缠绕困难。这些挑战是通过优化树脂粘度和缠绕模式设计来解决的。结果表明，采用优化黏度制备的复合材料试样在热解前和热解后的抗拉强度分别比未优化的试样提高了228.03%和97.68%。此外，经过3次聚合物浸润和热解处理的复合材料的密度和抗拉强度分别比未致密化的复合材料提高了13.08%和80.37%。高温氧化和火焰测试显示出优异的热稳定性和氧化稳定性。此外，与碳纤维增强陶瓷基复合材料相比，所研制的复合材料在9.3-10.9 GHz频率范围内的介电常数至少降低了两级，反射损耗低于- 7 dB，突出了其优越的电磁隐身性能。

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引用次数: 0

Effects of projectile material on high-speed penetration/perforation of Inconel 718 alloy plates: Experiments and simulations 弹丸材料对Inconel 718合金板高速侵彻/穿孔的影响：实验与模拟

IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY

Defence Technology(防务技术)

Pub Date : 2026-02-01 Epub Date: 2025-09-18 DOI: 10.1016/j.dt.2025.09.026

Yandan Chen , Junyi Hua , Nan Wang , Jun Wu , Bixiong Bie , Yonggang Lu , Bo Li , Yang Cai , Shengnian Luo

We investigate the effects of projectile material on high-speed penetration/perforation of Inconel 718 alloy (IN718) plates. High-speed ballistic impact tests are conducted on 2 mm-thickness IN718 plates with 5-mm-diameter stainless steel 304 (SS304), Ti alloy TC4, and Al alloy AA1060 spherical projectiles. The impact processes are captured with high-speed photography. Optical and scanning electron microscopy and laser scan are conducted on recovered projectiles and targets. Finite element models of the ballistic impact are established based on the coupled Eulerian–Lagrangian algorithm with the Johnson–Cook constitutive model and failure criterion, and can well reproduce the experimental results. The experimental and simulated data related to projectile dynamics, and the geometries of postmortem projectiles and bullet holes are analyzed with phenomenological models. Projectile velocity evolution can be described with hydrodynamic models of penetration. Dimensional analysis reveals a universal relationship between the bullet hole expansion coefficient and the normalized dynamic pressure, regardless of the projectile material. However, the projectile material does affect projectile deformation, bullet hole size, and energy absorption of target.

研究了弹丸材料对IN718合金（IN718）板高速侵彻的影响。采用直径为5mm的不锈钢304 （SS304）、钛合金TC4、铝合金AA1060球形弹丸，对厚度为2mm的IN718板进行高速弹道冲击试验。撞击过程用高速摄影捕捉到。对回收的弹丸和目标进行了光学、扫描电子显微镜和激光扫描。基于欧拉-拉格朗日耦合算法，结合Johnson-Cook本构模型和失效准则，建立了弹道冲击的有限元模型，能较好地再现试验结果。用现象学模型对弹丸动力学、死后弹丸几何形状和弹孔等相关实验和仿真数据进行了分析。弹丸速度演化可以用侵彻水动力模型来描述。量纲分析表明，无论弹丸材料如何，弹孔膨胀系数与归一化动压之间存在普遍的关系。但弹丸材料对弹丸变形、弹孔尺寸、靶体吸能等都有影响。

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引用次数: 0

A methodology for constructing the system-of-systems environment to evaluate UAV decision systems 构建系统的系统环境评估无人机决策系统的方法

IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY

Defence Technology(防务技术)

Pub Date : 2026-02-01 Epub Date: 2025-09-25 DOI: 10.1016/j.dt.2025.09.029

Zhiqi Liu , Mingqiang Luo , Yulu Ma , Chenguang Xing , Ruo Wang , Daheng Chen , Xiaolu Wang

Evaluating Unmanned Aerial Vehicle (UAV) systems within a System-of-Systems (SoS) environment helps clarify their contribution to the overall combat capability and supports effectiveness-oriented system optimization. When assessing decision systems in such an environment, cross-level modeling and simulation are required, which often face a trade-off between low modeling cost and high simulation accuracy, while the credibility of results remains challenging to ensure. To address these issues, this study proposes a hybrid-granularity Hardware-In-the-Loop (HIL) SoS environment construction method based on Graphical Evaluation and Review Technique (GERT). The method employs GERT to analyze the relationships between simulation systems, the System Under Test (SUT), and mission outcomes, thereby determining the required model precision for different systems. A dynamic resource allocation algorithm is applied to adjust model granularity on demand, ensuring high-fidelity simulation under constrained total cost. Additionally, GERT estimates the computational frequency and communication bandwidth requirements of the SUT, guiding hardware selection to enhance simulation credibility. A UAV maritime combat case study was conducted for validation. The results demonstrate that, compared to the flat modeling approach, the hybrid-granularity scenario based on GERT analysis achieves higher simulation accuracy with lower overall model complexity. The coefficient of variation in evaluation results significantly decreases in HIL simulations compared to virtual simulations, confirming improved credibility. Under the hybrid-granularity HIL scenario, the decision system was evaluated from an effectiveness perspective, identifying the most sensitive performance parameter. Subsequent targeted optimization led to an 11.90% improvement in effectiveness, validating the method's practical utility.

在系统的系统（so）环境中评估无人机（UAV）系统有助于阐明其对整体作战能力的贡献，并支持以有效性为导向的系统优化。在这种环境下对决策系统进行评估时，需要进行跨层建模和仿真，这往往面临着低建模成本和高仿真精度之间的权衡，而结果的可信度仍然难以保证。为了解决这些问题，本研究提出了一种基于图形评价与评审技术（GERT）的混合粒度硬件在环（HIL） SoS环境构建方法。该方法利用GERT分析仿真系统、被测系统（System Under Test， SUT）和任务结果之间的关系，从而确定不同系统所需的模型精度。采用动态资源分配算法按需调整模型粒度，保证了总成本约束下的高保真仿真。此外，GERT估计SUT的计算频率和通信带宽需求，指导硬件选择以提高仿真可信度。进行了无人机海上作战案例研究以进行验证。结果表明，与平面建模方法相比，基于GERT分析的混合粒度场景在整体模型复杂度较低的情况下实现了更高的仿真精度。与虚拟仿真相比，HIL仿真中评估结果的变异系数显著降低，证实了可信度的提高。在混合粒度HIL场景下，从有效性角度对决策系统进行评价，找出最敏感的性能参数。随后的针对性优化使效率提高了11.90%，验证了该方法的实用性。

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引用次数: 0

Phase geometric propagation model of spherical projectile impacting thin plate based on shock wave propagation 基于激波传播的球面弹丸撞击薄板的相位几何传播模型

IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY

Defence Technology(防务技术)

Pub Date : 2026-02-01 Epub Date: 2025-09-25 DOI: 10.1016/j.dt.2025.09.034

Lvtan Chen , Qiguang He , Chenyang Wu , Ying Chen , Qunyi Tang , Xiaowei Chen

Material phase-transition represents a significant phenomenon and mechanism in the context of hypervelocity protection. This study presents a thorough analysis of the phase-transition phenomena induced by shock pressure as the shock wave propagates initially to the rear of the projectile. The shock wave that induces a phase-transition is commonly referred to as a macroscopic phase-transition wave, whereas the interface that separates the distinct phases is referred to as macroscopic phase-boundary. The contact interface between the spherical projectile and the thin plate, characterized by its curved surface, plays a significant role in the nonlinear propagation and evolution of wave systems. The pressure distribution along the central axis of a spherical projectile is derived in accordance with the linear decay law observed for axial pressure. On this basis, a quadratic function is employed to characterize the trend of changes in wave front pressure, thereby facilitating the establishment of a model for wave front pressure distribution. Using the phase-transition pressure criterion for materials, the wave front phase evolution process is derived, and the macroscopic phase-boundary is determined. Based on the geometric propagation model (GPM) and the pressure distribution of the wave front, a phase geometric propagation model (PGPM) is proposed. The phase distribution of a spherical projectile impacting a thin plate is obtained by theoretical methods. The accuracy of the PGPM is subsequently validated through a comparison of its results with those obtained from numerical simulations.

材料相变是超高速保护中一个重要的现象和机制。本研究对冲击波最初传播到弹丸尾部时冲击波压力引起的相变现象进行了深入分析。引起相变的激波通常被称为宏观相变波，而将不同相分离的界面被称为宏观相界。球面弹丸与薄板的接触界面以其曲面为特征，在波系的非线性传播和演化中起着重要的作用。根据轴向压力的线性衰减规律，导出了球面弹丸沿中轴线的压力分布。在此基础上，采用二次函数表征波前压力变化趋势，便于建立波前压力分布模型。利用材料相变压力判据，推导了波前相演化过程，确定了宏观相界。基于几何传播模型和波前压力分布，提出了相位几何传播模型。用理论方法得到了球面弹丸撞击薄板时的相位分布。随后，通过与数值模拟结果的比较，验证了PGPM的准确性。

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引用次数: 0

Experimental study on damage characteristics of t-shaped stiffened plates subjected to different types of shaped charges: Linear-shaped charge, embowed linear-shaped charge, and embowed linear explosively formed projectile t型加筋板在线形装药、包埋线形装药和包埋线形爆装药三种不同装药作用下损伤特性的实验研究

IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY

Defence Technology(防务技术)

Pub Date : 2026-02-01 Epub Date: 2025-09-10 DOI: 10.1016/j.dt.2025.09.012

Shenhe Zhang , Zhifan Zhang , Shuxin Yang , Longkan Wang , Yutong Sui , Guiyong Zhang , Zhi Zong

In order to investigate the penetration performance of Linear-Shaped Charge (LSC), Embowed Linear-Shaped Charge (ELSC), and Embowed Linear Explosively Formed Projectile (ELEFP) on T-shaped stiffened plates, a series of near-field air-burst experiments are conducted. The damage modes and characteristics of the target plates are compared and analyzed. Each flat plate section is completely punctured, resulting in a penetration hole. The damage modes induced by the three charge types on the stiffened plate structure are consistent, characterized by shear failure in the central region of the flat plate due to penetration by the penetrator, localized plastic deformation of the flat plate, and local penetration failure resulting from partial perforation of the central stiffener. The penetration lengths caused by ELSC and ELEFP are 45.1% and 46.1% larger than that of LSC, while the half-width of the penetration hole generated by ELEFP is 54.2% and 24.7% smaller than that of ELSC and LSC, respectively. The penetration height caused by ELEFP are 17.5% and 62.1% larger than that of ELSC and LSC, respectively. The stiffener effectively segments the damage area, enhancing the local structural strength and limiting the extent of plastic deformation in the flat plate section. The comparative results show that the ELSC proves to be more effective for efficient large-scale damage, and ELEFP is more suitable for achieving efficient localized damage.

为了研究线形装药（LSC）、压花线形装药（ELSC）和压花线形爆炸成形弹（ELEFP）在t型加筋板上的侵彻性能，进行了一系列近场空爆试验。对目标板的损伤模式和损伤特性进行了比较分析。每个平板部分被完全刺穿，形成一个穿透孔。三种装药对加筋板结构的破坏模式一致，均表现为侵彻器侵彻导致的平板中部剪切破坏、平板局部塑性变形和中部加劲器部分穿孔导致的局部侵彻破坏。ELSC和ELEFP产生的穿透长度分别比LSC大45.1%和46.1%，而ELEFP产生的穿透孔半宽分别比ELSC和LSC小54.2%和24.7%。ELEFP的穿透高度分别比ELSC和LSC高17.5%和62.1%。加劲肋有效分割了损伤区域，提高了局部结构强度，限制了平板截面的塑性变形程度。对比结果表明，ELSC更适用于高效的大规模损伤，ELEFP更适用于高效的局部损伤。

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