直流稳压电源瞬态响应的测量

分析了直流稳压电源瞬态响应的技术要求 ,提出了电源瞬态响应的测量方法 。     

基于模拟退火算法与响应面模型的三维气动优化设计方法

提出了一套适用于高耗时三维气动设计问题的优化设计体系.其主要思想是采用改进拉丁超立方体试验设计选取样本点,应用自行开发的三维粘性流场求解程序进行流场计算建立数据库,采用二次响应面方法建立近似模型,再应用高效模拟退火算法进行全局寻优.以NASA rotor57为对象,在详细进行流场计算基础上采用所提出的优化体系对其进行了三维积叠优化设计.在对流量、效率加以严格约束的条件下,总压比可提高1.8%,对流场结构进行了分析.优化结果表明本优化方法省时,适于三维气动设计的特点.     

大型水陆两栖飞机抗浪能力研究

阐述了大型灭火/水上救援水陆两栖飞机高抗浪船体设计方法，对飞机起飞过程中的水阻力、滑行稳定性和波浪运动响应进行了研究。通过对比分析，发现断阶喷溅形态是影响水阻力出现第2峰值的关键因素，提出了水阻力曲线出现第2峰值的条件；分析了在纵倾角-速度图中不同区域滑行时飞机纵倾角响应特性，明确了飞机在典型状态的稳定边界；通过研究波长、速度对飞机纵倾角、飞高和机身垂向过载的影响，确定了飞机在波浪水面发生剧烈运动响应时对应的波长范围。     

时域中低阶等效系统方法及其应用

介绍了用低阶等效系统拟配高阶飞机时间反应的新方法，该方法利用飞行试验中收集的飞机输入和输出数据识别飞机动力学特性，以变稳飞机ＮＴ－３３Ａ飞行试验为例，预测和评定了不同构形情况下的有关飞行品质，并与带宽准则估计结果和实际驾驶员评定进行了比较，结果证明该方法适用于飞行试验中飞行品质的评定。     

发动机指示和机组警告系统的监控研究

本文作者在详细研究发动机指示和机组警告系统的基础上，对其监控技术和原理作了较为深入的探讨。这对了解其他的机载电气、电子设备的监控及测试技术也会有所帮助。     

基于一种高精度微分求积法的结构动力响应数值计算

采用了一种高阶精度的Pade逼进的时间域上格栅取点的时间步积分的微分求积方法，对双质点系及梁在强迫力作用下的振动特性进行了数值分析。计算结果表明．这种方法具有明显的高精度及低耗时并且对于二阶初值问题是无条件稳定的。在所考虑的时域内的动力响应过程中，系统的总能量是守恒的。     

用分域型矩量法分析阻尼介质对壳体塑性动力响应的影响

本文给出分域型短量法，并将其应用于壳体塑性动力响应问题。文中以承受均布冲击侧压的固支长圆柱壳为例，应用分域型矩量法分析阻尼介质对其塑性动力响应的影响。     

叶片非线性瞬态响应计算方法与参数选择

在计算叶片的岛撞击响应时，为提高计算精度及降低计算成本，需要为待解的非线性动力方程组制定一个合理的求解方案，这包括选择系数矩阵的算法与非线性动力方程组的解法，以及选择主要计算参数，本文介绍了当使用ＡＤＩＮＡ程序计算平板叶片在冲载荷下的非线性瞬态响应时，对计算方法与计算参数的选择，算例说明了时间步长的重要影响作用。     

A thermal activation based constitutive model for the dynamic deformation of AA5083 processed by large-scale equal-channel angular pressing

Aluminum alloy 5083 (AA5083) processed by large-scale Equal-channel angular pressing (ECAP) is an excellent engineering material with great prospects for industrial applications. An accurate assessment of the underlying constitutive relationships with easily determined material constants is critical for the predictive design and informed processing of such structural materials. To develop such a design framework, uniaxial dynamic compressive tests over a wide range of temperatures (293–573 K) were carried out for an ECAP-processed AA5083 alloy. Additionally, the microstructure before and after dynamic loading was characterized by SEM and TEM. Based on the experimental results, a new dynamic constitutive model, based on thermal activation theory, was established to describe the plastic flow behavior of the AA5083 alloy that incorporates the effects of plastic strain, temperature, and strain rate. The input parameters of the new model were determined using a particle swarm optimization (PSO) method. The model predictions show excellent agreement with experimental results, which suggests that the current predictive constitutive model is highly effective in reproducing the dynamic deformation behavior of the large-scale ECAP-processed AA5083.     

In-process adaptive milling for large-scale assembly interfaces of a vertical tail driven by real-time vibration data

Assembly interfaces, the joint surfaces between the vertical tail and rear fuselage of a large aircraft, are thin-wall components. Their machining quality are seriously restricted by the machining vibration. To address this problem, an in-process adaptive milling method is proposed for the large-scale assembly interface driven by real-time machining vibration data. Within this context, the milling operation is first divided into several process steps, and the machining vibration data in each pro...