Pressure relief of underground ammunition storage under missile accidental ignition

Safety of underground ammunition storage is an important issue, especially during the accidental ignition of missiles. This work investigates the pressure and temperature distribution of the multi-layer underground ammunition storage with a pressure relief duct during the accidental ignition process of the missile. A large-scale experiment was carried out using a multi-layered restricted space with a pressure relief duct to simulate the underground ammunition store and a solid rocket motor to simulate the accidental ignition of the missile. The results show that when the motor gas mass flow increased by 5.6 times, the maximum pressure of the ammunition storage increased by 5.87 times. At a certain motor flow rate, when the pressure relief exhaust area at the end of the relief duct was reduced by 1/2, the maximum pressure on the first layer did not change. But the rate of pressure relief was reduced and the time delayed for the pressure of ammunition store to drop to zero. In this experiment, when the motor ignition position was located in to the third layer ammunition chamber, the maximum pressure was reduced by 32.9％ and also reduced the rate of change of pressure. In addition, for the experimental conditions, the theoretical analysis of the pressure relief of the ammunition storage is given by a simplified model. Based on the findings, some suggestions to the safety protection design of ammunition store are proposed.     

基于超网络的近距空中支援信息流转模式构建

稳健灵活的信息流转模式是近距空中支援顺利实施的重要保障.针对近距空中支援信息流转模式构建问题,建立基于超网络的作战信息流转"两层四网"模型.根据作战经验,分析近距空中支援作战的主要作战力量及基本流程,抽象出相应的作战节点和信息关系,以此建立近距空中支援作战信息流转超网络模型.针对超网络节点的超度分布、网络弹性等特性进行仿真实验.仿真结果表明,当前近距空中支援超网络具有一定的合理性和稳定性,同时为下一步优化作战网络结构提供了参考.     

WSNs中基于鸡群优化算法选择簇头的簇路由

能量是无线传感网络(Wireless Sensor Networks,WSNs)的重要资源.有效地利用节点能量可延长网络寿命.簇技术是提高资源分配、缓解网络能耗的有效策略.提出基于鸡群优化算法选择簇头的簇路由(Chicken Swarm Optimization-based Cluster Head Selecting Clustering Routing,CSO-CHS).CSO-CHS路由先从能量角度构建目标函数,再利用鸡群优化算法产生最优鸡群,进而形成最优的簇.通过最优的簇,平衡节点间能耗,进而实现延长网络寿命的目的 .仿真结果表明,相比于同类算法,CSO-CHS路由缓解了节点能耗速度,延长了网络寿命.     

Disruption management in production planning

We study the problem of recovering a production plan after a disruption, where the disruption may be caused by incidents such as power failure, market change, machine breakdown, supply shortage, worker no‐show, and others. The new recovery plan we seek after has to not only suit the changed environment brought about by the disruption, but also be close to the initial plan so as not to cause too much customer unsatisfaction or inconvenience for current‐stage and downstream operations. For the general‐cost case, we propose a dynamic programming method for the problem. For the convex‐cost case, a general problem which involves both cost and demand disruptions can be solved by considering the cost disruption first and then the demand disruption. We find that a pure demand disruption is easy to handle; and for a pure cost disruption, we propose a greedy method which is provably efficient. Our computational studies also reveal insights that will be helpful to managing disruptions in production planning. © 2005 Wiley Periodicals, Inc. Naval Research Logistics, 2005.     

A concave‐cost production planning problem with remanufacturing options

We focus on the concave‐cost version of a production planning problem where a manufacturer can meet demand by either producing new items or by remanufacturing used items. Unprocessed used items are disposed. We show the NP‐hardness of the problem even when all the costs are stationary. Utilizing the special structure of the extreme‐point optimal solutions for the minimum concave‐cost problem with a network flow type feasible region, we develop a polynomial‐time heuristic for the problem. Our computational study indicates that the heuristic is a very efficient way to solve the problem as far as solution speed and quality are concerned. © 2005 Wiley Periodicals, Inc. Naval Research Logistics, 2005     

小口径火炮侵彻钢靶模拟实验研究及有限元分析

对小口径火炮侵彻钢靶问题,分别进行了实验和有限元分析,并将所得结果进行了比较;分析了小口径火炮侵彻钢靶的侵彻过程,得到了带空腔弹丸高速垂直侵彻钢板的典型破坏模式.     

身管武器生产定型时机的量化决策

提出以大型试验批个数来确定身管武器生产定型时机的方法,并依据统计决策与贝叶斯分析方法,结合专家信息与收集的数据,对身管武器生产定型时机作出量化判定,为定型委员会的决策提供理论与数据支持。     

培育人民军队过硬战斗精神努力推进军事斗争准备

战争是敌对双方物质和精神力量的综合较量,培养过硬的战斗精神对取得战争胜利至关重要。培养过硬战斗精神必须不断强化官兵“军魂”意识,必须把握其衡量评判标准,必须认清其生成机制,必须塑造正确的价值导向。     

基于随机虚拟样机的某型自行火炮扭力轴动力仿真

依据随机动力学、多体系统动力学和数理统计理论,借助MSC\Adams仿真软件和MATLAB工具,提出随机虚拟样机的概念。并以某型自行火炮的扭力轴为例,在建立的虚拟样机上,实现不确定性因素下从底盘整体到悬挂系统、再到扭力轴的动力仿真。     

异类传感器信息融合的分布式滤波算法

基于联邦滤波算法,对雷达/红外双模导引头数据融合算法进行了研究,给出了基于雷达/红外双模导引头跟踪系统的结构及算法模型.针对典型工作状况参数,对匀速、匀加速、机动等目标运动状态进行了蒙特卡罗追踪仿真.仿真结果表明:基于联邦滤波的分布式融合跟踪算法,对各种目标运动状态下的位置、速度跟踪精度和抗干扰能力都相对于雷达单模跟踪的较好.