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排序方式: 共有82条查询结果,搜索用时 15 毫秒
11.
针对BLISS 2000优化过程中权值系数的引入给实际应用带来的困难,提出一种改进的BLISS优化过程——混合BLISS( Hybrid BLISS,HBLISS).该方法在保持BLISS 2000的基本算法结构的基础上取消权值系数,利用耦合变量的最小残差协调子系统级和系统级优化,给出了HBLISS的算法结构和基本流程... 相似文献
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This paper presents an actuator used for the trajectory correction fuze, which is subject to high impact loadings during launch. A simulation method is carried out to obtain the peak-peak stress value of each component, from which the ball bearings are possible failures according to the results. Subsequently, three schemes against impact loadings, full-element deep groove ball bearing and integrated raceway, needle roller thrust bearing assembly, and gaskets are utilized for redesigning the actuator to effectively reduce the bearings' stress. However, multi-objectives optimization still needs to be conducted for the gaskets to decrease the stress value further to the yield stress. Four gasket's structure parameters and three bearings' peak-peak stress are served as the four optimization variables and three objectives, respectively. Optimized Latin hypercube design is used for generating sample points, and Kriging model selected according to estimation result can establish the relationship between the variables and objec-tives, representing the simulation which is time-consuming. Accordingly, two optimization algorithms work out the Pareto solutions, from which the best solutions are selected, and verified by the simulation to determine the gaskets optimized structure parameters. It can be concluded that the simulation and optimization method based on these components is effective and efficient. 相似文献
13.
Muhammad Imran Dong-yan Shi Li-li Tong Ahsan Elahi Hafiz Muhammad Waqas Muqeem Uddin 《防务技术》2021,17(4):1190-1206
This paper presents the design optimization of composite submersible cylindrical pressure hull subjected to 3 MPa hydrostatic pressure. The design optimization study is conducted for cross-ply layups [0s/90t/0u], [0s/90t/0u]s, [0s/90t]s and [90s/0t]s considering three uni-directional composites, i.e. Carbon/Epoxy, Glass/Epoxy, and Boron/Epoxy. The optimization study is performed by coupling a Multi-Objective Genetic Algorithm (MOGA) and Analytical Analysis. Minimizing the buoyancy factor and maximizing the buckling load factor are considered as the objectives of the optimization study. The objectives of the optimization are achieved under constraints on the Tsai-Wu, Tsai-Hill and Maximum Stress composite failure criteria and on buckling load factor. To verify the optimization approach, optimization of one particular layup configuration is also conducted in ANSYS with the same objectives and constraints. 相似文献
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Using a data set of historical battles from 1600 to 1973, this paper analyzes the empirical determinants of tactical success in modern war. Based on a reduced form approach we consider key elements of military theory as production factors for combat success as an output of a military production function. The paper focuses on the relationship of material and non-material factors to battlefield success, and especially on the role of superior force strengths. Contrary to the emphasis on technology which can be found in the recent literature, our estimation results indicate that numerical superiority has retained its crucial role for battlefield performance throughout history. In general, human elements of warfare, like leadership, morale and surprise, have continued to be important determinants of battle outcome despite technological progress in weapons. 相似文献
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针对装甲装备质量监控对象不明确的问题,分析了质量功能展开(Quality Function Development,QFD)在质量监控分析中应用的可行性,提出了基于QFD的装甲装备质量监控分析方法,构建了装甲装备质量监控指标的QFD瀑布式分解模型。通过过程规划、特性规划、指标规划3个环节,确定了装甲装备储存、动用、保养、修理为质量监控的关键过程,性能及时间性为质量监控的关键特性,完好率、平均故障间隔时间、使用可用度、平均修复时间为质量监控的关键指标。 相似文献
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分析了复杂系统使用保障测试性设计方法的技术背景,系统战备状态的含义、重要性和描述方法;重点探讨了系统设备级(初始约定层次)故障设备对系统分系统战备状态影响进行分析的有效方法。并以某防空导弹武器系统为例,介绍如何利用功能分析法具体解决复杂系统使用保障测试的可测性、可控制性和可观察性等工程化设计问题。推荐一组实用的系统/分系统战备状态(正常/降级/故障)判定逻辑运算数学模型和基层级综合保障(使用保障+维修保障)计划流程图。 相似文献
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张民选 《国防科技大学学报》1996,18(3):115-120
本文分别讨论了巨型机中计算y/x、y/、ax、logax、xy等函数的算法设计及其误差分析。 相似文献
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