Modeling and simulation of dynamic performance of horizontal steam-launch system

Based on theory of variable-mass system thermodynamics, the dynamic mathematic models of each component of the horizontal steam-launch system were established, and by the numerical simulation of the system launching process, the thermodynamics and kinetics characteristics of the system with three valves of different flow characteristics were got. The simulation results show that the values of the peak-to-average ratios of dimensionless acceleration with the equal percentage valve, the linear valve and the quick opening valve are 1.355, 1.614 and 1.722, respectively, and the final values of the dimensionless velocities are 0.843, 0.957 and 1.0, respectively. In conclusion, the value of the dimensionless velocity with the equal percentage valve doesn＇t reach the set value of 0.90 when the dimensionless displacement is 0.82, while the system with the linear valve can meet the launching requirement, as well as the fluctuation range of dimensionless acceleration is less than that of the quick opening valve. Therefore, the system with the linear valve has the best performance among the three kinds of valves.     

舰船电子装备可靠性信息采集与分析系统

针对当前舰船电子装备可靠性信息采集与分析中所存在的信息结构不规范、记录要求不准确、统计分析不能满足决策的现状,在全面分析电子装备可靠性评价指标和所需原始数据的基础上,按照软件工程的方法,设计了电子装备现场可靠性信息数据库,开发了能够开展电子装备产品属性管理、可靠性信息管理和可靠性、维修性及保障性指标统计分析的系统软件,解决了电子装备可靠性维修性数据收集、储存、整理、统计分析工作量大等难题。     

网络系统可靠性近似估算方法的对比研究

在讨论了网络系统可靠性计算难题的基础上，以满足工程实际的精度需要并减少分析计算工作量为目标，对现有的4种近似估算网络系统可靠性的方法进行了分析，指出了各种方法产生误差的原因，定性分析了有关方法为减少误差所采取措施的合理性。针时2种不同复杂程度的典型网络系统，通过数值算例，给出了单元可靠度不同情形下的系统可靠度计算值；与精确算法时比之后，得到了量化的误差．基于对各方法的工作量和误差的综合分析，给出了具有工程指导意义的建议．     

舰艇编队不同备件保障方案的对比研究

舰艇编队备件配置方案对其战备完好性的形成起着重要作用,通过优化库存管理策略,建立符合工程实际的备件携带方案,可以在舰艇满足编队最低可用度要求的前提下,最大限度地降低保障经费。以舰艇编队索马里护航备件利用率低为研究背景,针对该问题以最低可用度约束下保障经费最小为优化目标,以多层级备件需求率为基础,建立了无串件拼修和无横向供应、无串件拼修和有横向供应、有串件拼修和无横向供应、有串件拼修和有横向供应4种不同情况下的舰艇编队库存管理优化模型,并给出了模型计算步骤和求解方法。通过4种备件保障方案的对比分析,提出了舰艇编队备件配置的决策和建议。