面源红外干扰弹对抗红外成像制导导弹的仿真研究

为验证机载面源红外干扰弹干扰效果,通过分析红外成像制导导弹和面源红外干扰弹的工作机理,建立面源红外干扰弹对红外成像制导导弹干扰的对空仿真系统。介绍系统内主要模型的实现方法,并结合具体的仿真试验场景进行仿真试验。结果表明,此系统能较好地仿真机载面源红外干扰弹对红外成像制导导弹的干扰过程,为进一步验证面源红外干扰弹干扰效果提供了技术实现基础。     

FLAMES仿真系统中目标毁伤仿真的实现

为了构建FLAMES中的目标毁伤仿真系统,在对FLAMES仿真系统体系结构分析的基础上,通过研究FLAMES中目标毁伤仿真的相关模型、函数及计算方法,归纳出目标毁伤仿真的实现流程。最后以飞机轰炸停机坪目标的毁伤计算为例,具体实现了FLAMES中的目标毁伤仿真。     

航空兵分队级战术模拟训练系统设计

针对航空兵部队训练急需,航空兵分队级战术模拟训练系统采用先进的分布/集中式系统结构,结合RTX实时操作系统、共享内存、动态连接库、GL Studio、Vega Prime等技术,以空军主战机型为仿真对象,对飞行、火控、航电等模块进行系统仿真,并针对航空兵部队在复杂电磁环境下空中作战的特点,结合红/蓝军指挥、演练管理、战场信息可视化等分系统,为飞行员提供了一个逼真的战术训练仿真平台。该系统能完成各种近似实战背景下的战术对抗训练并进行新战法研究。     

基于数据耕耘的探索性仿真实验框架研究

基于数据耕耘思想,设计了探索性仿真实验框架,并对框架中每个部分进行了简要探讨。基于数据耕耘的探索性仿真实验框架由乒乓式对抗推演预实验、单个仿真想定生成环、仿真想定空间运行环和仿真结果分析环四部分组成,通过将人的经验、智慧与计算机仿真手段相结合,在多次循环的过程中逐渐形成所需的军事决策建议或寻找感兴趣的战争规律。通过构建探索性仿真实验框架,能够将各种定量、定性分析方法整合起来,围绕实验目标实施探索性仿真实验。     

基于云重心方法的海战场环境评估

针对当前海战场环境评估方法存在的问题与不足,引入云理论对其进行科学评估。首先,对云模型和云重心的评判步骤进行阐述。然后,建立海战场环境的云模型和评价指标体系,算出加权偏离度θ。最后,将结果输入云发生器得出评价结果。实验结果表明,该方法简单易行,可操作性强,为海战场环境评估提供了一种较好的途径。     

超音速气流中热塑性复合材料壁板的非线性热颤振特性

热塑性复合材料结构在高速流场中的颤振行为是可重复使用航天器设计中需要考虑的问题.基于Mindlin厚板理论和Von-Karman大变形理论描述热塑性复合壁板结构大变形,超音速气动力采用活塞气动理论.考虑温度引起的壁板面内热应力和热塑性材料力学性能的改变.根据虚功原理和有限元法推导建立了热塑性复合材料壁板的热颤振模型,进...     

Numerical investigation of the shockwave overpressure fields of multi-sources FAE explosions

Shockwaves from fuel-air explosive (FAE) cloud explosions may cause significant casualties. The ground overpressure field is usually used to evaluate the damage range of explosion shockwaves. In this paper, a finite element model of multi-sources FAE explosion is established to simulate the process of multiple shockwaves propagation and interaction. The model is verified with the experimental data of a fourfold-source FAE explosion, with the total fuel mass of 340 kg. Simulation results show that the overpressure fields of multi-sources FAE explosions are different from that of the single-source. In the case of multi-sources, the overpressure fields are influenced significantly by source scattering distance and source number. Subsequently, damage ranges of overpressure under three different levels are calculated. Within a suitable source scattering distance, the damage range of multi-sources situation is greater than that of the single-source, under the same amount of total fuel mass. This research provides a basis for personnel shockwave protection from multi-sources FAE explosion.     

Force chains based mesoscale simulation on the dynamic response of Al-PTFE granular composites

Force chains based mesoscale simulation is conducted to investigate the response behavior of aluminum-polytetrafluoroethylene (Al-PTFE) granular composites under a low-velocity impact. A two-dimensional model followed the randomly normal distribution of real Al particles size is developed. The dynamic compressive process of Al-PTFE composites with varied Al mass fraction is simulated and validated against the experiments. The results indicate that, force chains behavior governed by the number and the size of agglomerated Al particles, significantly affects the impact response of the material. The failure mode of the material evolves from shear failure of matrix to debonding failure of particles with increasing density. A high crack area of the material is critical mechanism to arouse the initiation re-action. The damage maintained by force chains during large plastic strain builds up more local stresses concentration to enhance a possible reaction performance. In addition, simulation is performed with identical mass fraction but various Al size distribution to explore the effects of size centralization and dispersion on the mechanical properties of materials. It is found that smaller sized Al particle of com-posites are more preferred than its bulky material in ultimate strength. Increasing dispersed degree is facilitated to create stable force chains in samples with comparable particle number. The simulation studies provide further insights into the plastic deformation, failure mechanism, and possible energy release capacity for Al-PTFE composites, which is helpful for further design and application of reactive materials.     

超声速地空导弹热环境风洞模拟研究

根据国内风洞的情况,比较了超声速地空导弹的飞行条件与风洞模拟能力的差距,分析了热环境风洞实验中应采用的相似准则,以及实验数据的处理方法。     

装备保障兵力机动模型的建立

在分析未来战争中机动作战对装备保障要求的基础上,明确了建立装备保障兵力机动模型的重要性。通过分析影响装备保障部(分)队机动状况的因素,建立了装备保障部(分)队的机动模型,研究了模型的计算流程。