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Investigation on the spatial distribution characteristics of behind-armor debris formed by the perforation of EFP through steel target

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Defence Technology（防务技术） 2020年第1期16卷 119-135页

作者： Xin wang Jianwei Jiang Shengjie Sun Jianbing Men shuyou wang State Key Laboratory of Explosion Science and Technology Beijing Institution of TechnologyChina

The behind-armor debris(BAD) formed by the perforation of an EFP is the main damage factor for the secondary destruction to the behind-armor components.Aiming at investigating the BAD caused by EFP,flash X-ray radiography combined with an experimental witness plate test method was used,and the FEM-SPH adaptive conversion algorithm in LS-DYNA software was erployed to model the perforation process.The simulation results of the debris cloud shape and number of debris were in good agreement with the flash X-ray radiographs and perforated holes on the witness plate,respectlvely.Threedimensional numerical simulations of EFP's penetration under various impact conditions were conducted.The results show that,an ellipsoidal debris cloud,with the major-to-minor axis radio(a/b)smaller than that caused by shaped charge jets,was formed behind the target.With the increase of target thickness(h) and decrease of impact velocity(v_0) and obliquity(θ),the value of a/b decreases.The number of debris ejected from target is significantly higher than that from EFP.Based on the statistical analysis of the spatial distribution of the BAD,An engineering calculation model was established considering the influence of h,v_0 and θ.The model can with reasonable accuracy predict the quantity and velocity distribution characteristics of BAD formed by EFP.

关键词： Behind-armor debris EFP FEM-SPH adaptive conversion algorithm Spatial distribution

指向“五育”融合的校本课程体系构建:理念与策略

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基础教育研究 2024年第6期 24-26,34页

作者：王书友山东胶州市云溪中学胶州266300

“五育”融合校本课程体系的构建理念体现在课程目标的化“孤”为“合”,课程结构的化“偏”为“全”,课程实施的化“泛”为“实”。文章从“五育”融合校本课程目标、校本课程结构、课程实施体系等方面介绍相关案例,并提出“五育”融... 详细信息

“五育”融合校本课程体系的构建理念体现在课程目标的化“孤”为“合”,课程结构的化“偏”为“全”,课程实施的化“泛”为“实”。文章从“五育”融合校本课程目标、校本课程结构、课程实施体系等方面介绍相关案例,并提出“五育”融合校本课程体系的实践策略,包括建立校本课程评价与激励机制、培养学生跨学科核心素养、课程项目化实施、社团活动课程化、打造数字化平台助力“五育”课程资源整合等。

关键词：基础教育 “五育”融合校本课程体系

铸件厚度及退火处理对蠕墨铸铁切削加工性能的影响

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工具技术 2024年第2期58卷 3-8页

作者：贾川川葛慧王术友孙志康季良刚苏瑞刘含莲中国重汽集团济南动力有限公司山东大学机械工程学院山东大学先进射流工程技术研究中心山东交通学院工程机械学院

以发动机缸体材料蠕墨铸铁RuT450为研究对象,通过监测其铣削加工过程中的切削力、切削温度及已加工表面粗糙度的变化,结合微观组织及力学性能演变分析其对切削性能的影响。研究表明,铸造厚度不同,材料的微观组织和力学性能不同;切削力... 详细信息

以发动机缸体材料蠕墨铸铁RuT450为研究对象,通过监测其铣削加工过程中的切削力、切削温度及已加工表面粗糙度的变化,结合微观组织及力学性能演变分析其对切削性能的影响。研究表明,铸造厚度不同,材料的微观组织和力学性能不同;切削力是石墨含量、蠕化率、残余应力、硬度、抗拉强度等性能指标的综合反映,切削热则与切削力密切相关;在保证强度指标的前提下,退火处理有助于降低铣削加工时的切削温度,对适度厚度的工件还可以降低切削力。在相对低速铣削时,退火处理可有效提高工件的加工表面质量;在保证满足表面质量的前提下,去应力退火后可以适当提升切削速度,提高蠕墨铸铁加工效率。

关键词：蠕墨铸铁铸件厚度退火切削力切削温度表面粗糙度

Formation Regularity of Annular Shaped Charge Jet by Numerical Simulation

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Formation Regularity of Annular Shaped Charge Jet by Numeric...

政党理论视域中“以人民为中心”的价值功能研究

第三届材料科学应用与能源材料国际研讨会

作者： Liping Xi Mei Li shuyou wang Jianwei Jiang Jianbing Men Shengjie Sun Key Laboratory of Explosion Science and Technology Beijing Institute of Technology

Formation process of an annular-shpere liner driven by shaped charge has been studied using AUTODYN numerical simulation software. Research works of factors, including length to diameter ratio of charge, detonation radius and distance between liner and shell, that affect the jet head velocity, deflection angle, and head diameter have been implemented. The results show that the liner driven by shaped charge initiated annularly will be shaped into a annular jet which can form a large-diemeter hole on the target, while the liner forms a converged jet when shaped charge is centrally initiated. As the ratio and the initiation radius increase, the jet diverges;as the distance between the liner and the shell increases, the jet converges.

关键词：

来源： cnki会议评论

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学海 2023年第4期 13-19页

作者：王述友张晓东青海民族大学民族学与社会学学院西宁810007 南京大学哲学系南京210023

“以人民为中心”是新时代中国共产党政党理论的重要支撑,发挥着科学理论指导、政党形象价值呈现以及政党文化价值传承的功能。“以人民为中心”是马克思主义科学理论同新时代中国特色社会主义相结合的具体历史产物,是新时代中国共产党... 详细信息

“以人民为中心”是新时代中国共产党政党理论的重要支撑,发挥着科学理论指导、政党形象价值呈现以及政党文化价值传承的功能。“以人民为中心”是马克思主义科学理论同新时代中国特色社会主义相结合的具体历史产物,是新时代中国共产党的理论标识。从政党形象而言,“以人民为中心”作为中国共产党的核心价值理念,直接呈现了中国共产党革命彻底的先锋队形象,具有政党话语的价值阐释力,成为政党形象与公众之间产生价值共鸣的桥梁。“以人民为中心”也是新时代中国共产党政党文化价值传承的重要载体,为新时代中国共产党政党文化的形成提供了精神动力、价值认同。

关键词：政党理论中国共产党 “以人民为中心” 价值功能

PENETRATION OF KINETIC ENERGIC PROJECTILE AGAINST PREDAMAGED CONCRETE TARGETS

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PENETRATION OF KINETIC ENERGIC PROJECTILE AGAINST PREDAMAGED...

The 7th International Conference on Shock and Impact Loads on Structures

作者： shuyou wang~* Beijing institute of Technology China Jianwei Jiang Beijing institute of Technology China Jianbing Men Beijing institute of Technology China

＜正＞Tandem warhead is one trend of the development of anti-concrete warheads, which is composed by the precursory shaped charge and the following kinetic energy projectile（KE projectile）.The most damage effect of the tandem warhead is determined by the matching parameters of two stages.In this paper,penetration of KE projectile against predamaged concretes is studied.A model of KE projectile with various head shape to predamaged concrete is set up on the basis of modified cavity expansion theory.How the pre-damage concrete crater’s strength weakening degree of damaged zone affect the penetration effect is researched.The influence of various hypotheses about strength weakening of the damaged zone to the penetrating depth is analyzed,and the linear weakening hypothesis is proved to be more close to the experiment result.

关键词： Tandem Warheads Kinetic Energy Projectile Predamaged Penetration

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爆炸成型弹丸药型罩用高密度合金选取准则

兵工学报 2022年第9期43卷 2330-2338页

作者：付恒蒋建伟王树有门建兵李梅北京理工大学爆炸科学与技术国家重点试验室北京100081

为解决高密度合金在爆炸成型弹丸(EFP)应用中的破碎失效问题,以典型钨镍系合金为研究对象,对不同钨含量的平板飞片试样开展了爆炸加载试验。基于对受试材料成形性能及失效机理的分析结果,结合传统药型罩材料的共同特性,提出了EFP高密度... 详细信息

为解决高密度合金在爆炸成型弹丸(EFP)应用中的破碎失效问题,以典型钨镍系合金为研究对象,对不同钨含量的平板飞片试样开展了爆炸加载试验。基于对受试材料成形性能及失效机理的分析结果,结合传统药型罩材料的共同特性,提出了EFP高密度合金罩材的选取准则,应用该准则进行了罩材选取,并通过爆炸加载成型及侵彻试验进行了验证。研究结果表明:钨镍合金难以形成完整侵彻体的原因在于,钨颗粒作为第二相粒子分布于基体中,使得大变形状态下在相界处因位错塞积而产生的应力集中无法避免,从而导致微裂纹形成并扩展以致材料发生断裂;高密度合金作为EFP药型罩材料,应具备完全固溶体的单相组织,若溶剂金属为非面心立方结构,则须具备低于服役环境温度的韧脆转变温度;依据上述准则选取的单相固溶体合金,其平板飞片与等壁厚球缺罩均能够形成完整侵彻体,试验结果与预期结果相符合。研究结果可以为EFP药型罩用高密度合金的设计、选取和应用提供参考依据。

关键词：毁伤与弹药工程爆炸成型弹丸药型罩材料高密度合金选取准则

Study on tracking algorithm of acoustic target

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声学技术 2003年第Z1期22卷 44-47页

作者： GU Xiaohui, wang shuyou (School of Mechanical Engineering, Nanjing University of Science & Technology, Nanjing 210094, China) School of Mechanical Engineering Nanjing University of Science & Technology Nanjing 210094 China

The prediction of helicopter′s track is very important for Anti-Helicopter Mine System (AHMS) in the battle. However, it is very difficult to get an accurate and reliable prediction when the data is very limited. This paper tries to establish a track forecast model based on the grey system theory to predict the radial distance, the azimuth and the elevation of a helicopter real-timely. The forecast model of grey system can directly predict the helicopter′s track, with out the need of coordinate conversion (polar coordinate to rectangular coordinate). So the measurement noise is relatively independent, the prediction accuracy can be improved. In the period of sampling, GM model has been established on line to improve prediction precision. The results of simulation indicate that higher prediction precision can be obtained with fewer surveying data.

关键词： Anti-helicopter mine system, helicopter, grey model, real time tracking

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增强后效复合药型罩结构的数值模拟

高压物理学报 2022年第1期36卷 192-199页

作者：李金霖蒋建伟门建兵王树有李梅北京理工大学爆炸科学与技术国家重点实验室北京100081

针对增强聚能射流的破甲后效问题,设计了等壁平顶锥形铜铝双层复合药型罩装药结构,采用冲击波物理显示欧拉动力学软件SPEED开展复合射流成型及对钢-铝间隔靶侵彻过程的数值模拟,分析内外双层药型罩高度比ε、药型罩锥角α等参数对复合... 详细信息

针对增强聚能射流的破甲后效问题,设计了等壁平顶锥形铜铝双层复合药型罩装药结构,采用冲击波物理显示欧拉动力学软件SPEED开展复合射流成型及对钢-铝间隔靶侵彻过程的数值模拟,分析内外双层药型罩高度比ε、药型罩锥角α等参数对复合射流成型和间隔靶侵彻性能的影响规律。研究结果表明:复合射流的头部速度随ε增大呈先减小后增加的趋势,在ε约为1/2时,可形成具有相近速度的铜铝同轴复合射流微元,利于铝射流微元与目标相互作用实现后效增强毁伤;且当α在50°~60°范围内时,复合射流中段为集中的铝射流微元,更利于侵彻后的爆炸或爆燃反应。对优化参数的复合药型罩结构数值模拟结果与文献公布的实验结果吻合较好。研究结果对增强后效聚能装药设计具有参考价值。

关键词：聚能装药增强后效射流数值模拟药型罩