疲劳裂纹随机扩展模型

疲劳裂纺在扩展过程中有很大分散性，根据不同的来源将这种分散性归为两类：材料固有的内在分散和外、环境等引起的外在分散性。     

惯性平台陀螺仪静态漂移系数分离方法研究

针对目前在发射场应用的测试方法不能分离出陀螺仪不等弹性静态漂移系数的现状，通过对陀螺仪静态漂移系数的测试原理和试验方法进行分析，推导了完整分离公式，提出了可行的分离方法，该方法可完整地分离出惯性平台陀螺仪各项静态漂移系数。     

TM波照射时喷气发动机进气道的极化散射矩阵

对ＴＭ波照射下喷气发动机进气道的极化散射矩阵进行了分析计算。通过将喷气发动机进气道等效成规则的圆波导腔结构，用多个波导模的叠加表示进气道内电磁场，并采用平面孔径辐射场的克希荷夫积分公式和电磁场互易定量，求得了进气道的极化散射矩阵，从而将复杂的腔体散射问题简化到只需求在规则波导模激励下喷气发动机终端的反射系数。所得结论对单、双站散射均适用。     

A novel environmental control system based on membrane dehumidification

This paper conducts a simulation study of a novel aircraft environmental control system based on membrane dehumidification(MD-ECS),and compares the system with the up-to-date four-wheel high pressure de-water system(4WHPDW-ECS).Mathematical models for the two systems are established,and a system simulation using a numerical technique is performed to analyze and compare the cooling performance of the two systems.Simulation results show that the cooling capacity of MD-ECS is much higher than that of 4WHPDW-ECS under the same working conditions,indicating that the novel system is theoretically feasible and promising.The effects of the sweep ratio of the membrane dehumidifier on the dehumidification and cooling performance of the system is also investigated.     

单元模态应变能变化率在旋翼大梁损伤识别中的应用研究

推导了单元模态应变能变化率的表达公式,通过对不同类型状况的模拟,得到了其单元模态应变能变化率。结果显示,无论对单一损伤还是多重损伤,单元模态应变能变化率都能准确地识别其位置。单元模态应变能变化率指标还可以在一定程度上反映损伤的程度。因此,该指标作为旋翼大梁损伤识别的参数是可行有效的。     

CATIA Tubing Design模块客户化研究

采用CATIA Tubing Design模块进行管路设计必须按设计标准进行客户化定制.研究了CATIA Tubing Design模块客户化定制的方法,包括项目定制、系统文件定制及管路零部件库定制.研究了管路零部件端头属性的兼容性规则及零部件的自动摆放规则,以实现管路零部件自动摆放；阐述了直硬管、弯硬管及软管的建模方法.     

Longitudinal behaviors of the IRI-B parameters of the equatorial electron density profiles retrieved from FORMOSAT-3/COSMIC radio occultation measurements

The electron density profiles in the bottomside F₂-layer ionosphere are described by the thickness parameter B0 and the shape parameter B1 in the International Reference Ionosphere (IRI) model. We collected the ionospheric electron density (N_e) profiles from the FORMOSAT-3/COSMIC (F3/C) radio occultation measurements from DoY (day number of year) 194, 2006 to DoY 293, 2008 to investigate the daytime behaviors of IRI-B parameters (B0 and B1) in the equatorial regions. Our fittings confirm that the IRI bottomside profile function can well describe the averaged profiles in the bottomside ionosphere. Analysis of the equatorial electron density profile datasets provides unprecedented detail of the behaviors of B0 and B1 parameters in equatorial regions at low solar activity. The longitudinal averaged B1 has values comparable with IRI-2007 while it shows little seasonal variation. In contrast, the observed B0 presents semiannual variation with maxima in solstice months and minima in equinox months, which is not reproduced by IRI-2007. Moreover, there are complicated longitudinal variations of B0 with patterns varying with seasons. Peaks are distinct in the wave-like longitudinal structure of B0 in equinox months. An outstanding feature is that a stable peak appears around 100°E in four seasons. The significant longitudinal variation of B0 provides challenges for further improving the presentations of the bottomside ionosphere in IRI.     

国外舰载直升机在航母编队中的地位和作用

舰载直升机由于其独特的特点和优势,在航母编队的许多作业任务中发挥了重要作用,不仅有力地保障了航母编队各项任务的展开,而且在航母编队争夺低空优势和水下优势的作战中,是编队作战体系不可或缺的装备。研究了直升机在国外母编队中的地位和作用,认为舰载直升机是航母编队斗力的倍增器。     

某型直升机惯导失效导致载机异常抖动故障分析

简要介绍了某型直升机惯导在空中失效后出现载机抖动的故障现象，分析了惯导部件的工作原理，找出了故障发生的机理和原因，并制定了相应整改措施。     

先进通用飞机航电系统概述

阐述了通用飞机航空电子系统的发展及其综合化的系统架构,介绍了Smart Deck系统和Top Deck系统这两款先进通飞航电系统的设计特点、系统架构以及两款先进系统的共性,最后对通用飞机航电系统的发展提出了一些展望。