实用M2052合金阻尼行为表征

名义组分为Mn-20Cu-5Ni-2Fe(原子分数，％)的M2052合金，具有很高的强度和阻尼性能．对该合金在不同条件下的阻尼性能采用多种方法进行了表征．该合金的高阻尼态出现在一个临界温度以下，该温度可以通过改变组分和热处理来调整．合金的室温阻尼性能强烈地依赖于频率、应变振幅以及静载荷的大小．     

车床静刚度计算机测试系统研制

在分析了车床的结构特点和车削工艺系统的受力情况和借鉴传统车床静刚度仪优点的基础上，研制了一套基于计算机控制的车床静刚度测试系统。系统由计算机作为信号检测、数据处理和控制核心，并配以精密位移传感器、压力传感器和步进电机及其驱动器等。实现了自动加载、卸载，采样，数据处理，直接绘制、显示和打印刚度曲线等功能。系统的成功研制为车床静刚度的测试提供了一种先进手段。实测结果表明，该系统具有自动化程度高、测试效率高、精度高、可靠性高、测试性能稳定的优点。     

Quantitation of volatile compounds in heated triolein by static headspace capillary gas chromatography/infrared spectroscopy-mass spectrometry

Static headspace and capillary gas chromatography/infrared spectroscopy-mass spectrometry were used to collect, separate, identify and quantitate the oxidative and thermal decomposition products in heated triolein. Approximately 4 L of triolein was heated in a deep-fat fryer at 190°C for 12 h each day for a total of 60 h, until it contained>-20% polymeric material. The concentration of heptane and octane increased after 12 h heating, then decreased upon further heating, while the concentration of volatile aldehydes decreased gradually during heating. After 12 h of heating, the concentrations of the major volatiles changed as follows: heptane (16.36 to 30.17 ppm), octane (24.48 to 40.77 ppm), heptanal (21.68 ppm to 9.11 ppm), octanal (35.53 to 36.64 ppm), nonanal (68.95 to 43.16 ppm), (E)-2-decenal (135.00 to 89.00 ppm) and (E)-2-undecenal (88.50 to 61.00 ppm). After 60 h of heating, when the oil contained over 20% polymeric material, the concentrations of heptane, octane, heptanal, octanol, nonanal, (E)-2-decenal and (E)-2-undecenal were 5.16, 4.39, 5.45, 7.02, 18.07, 12.50 and 6.00 ppm, respectively.     

Torque Transmission Capabilities of Bonded Polygonal Lap Joints for Carbon Fiber Epoxy Composites

Although carbon fiber epoxy composite materials have excellent properties for structures, the joint in composite materials often reduces the efficiency of the composite structure because the joint is often the weakest area in the composite structure.

In this paper, the effects of the adhesive thickness and the adherend surface roughness on the static and fatigue strengths of adhesively-bonded tubular polygonal lap joints have been investigated by experimental methods. The dependencies of the static and fatigue strengths on the stacking sequences of the composite adherends were observed.

From the experimental investigations, it was found that the fatigue strength of the circular adhesively-bounded joints was quite dependent on the surface roughness of the adherends and that polygonal adhesively-bonded joints had better fatigue strength characteristics than circular adhesively-bonded joints.     

陶瓷材料断裂韧性测试新技术：静态爆破剂预制裂纹的研究

准确测试陶瓷材料断裂韧性Ｋ１Ｃ的关键是预制具有原生裂纹的试样。本文以单边切口梁法测试Ｋ１Ｃ为基础，提出了一种简便而有效的陶瓷材料原生裂纹的预制方法－静态膨胀法。研究结果表明：静态膨胀法中裂纹的扩展是稳态的；通过调节影响微裂纹产生与扩展的多种因素，可以准确地控制裂纹扩展的深度，预制出合适的原生裂纹，为准确评价结构陶瓷的断裂韧性提供了一种有效可行的方法。     

锌系工件的静电粉末涂装和工艺管理

讨论了锌系工件喷涂的相关工艺、现场管理、技术参数、质量检验和环境要求等。     

导静电乳液胶粘剂的研制

用多元乳液共聚法制备了用于粘贴导静电PVC地板胶粘剂,加入乙炔碳黑赋予乳液胶粘剂导静电性能。研究了影响胶接强度和初粘力的主要因素,确定m(VAc)/m(BA+VAc)较合适比为1∶3;研究了乳化剂和交联单体对乳液性能的影响,研究得出,适量加入AA和HMAM可以减少乳化剂的用量,提高乳液的性能;考查了影响导静电性能的因素,研究表明,导静电性能由乙炔碳黑决定,其加入量越大,导静电性能越好。得到的导静电乳液胶粘剂胶接强度达到0.51MPa以上,导静电可达到7.2×103Ω,两项指标均超过国家标准。     

动态水力旋流技术发展综述

介绍了动态水力旋流器的结构、操作原理及国内外发展概况,对比分析了动态水力旋流器与静态水力旋流器在处理含油污水方面的不同利弊,总结了动态水力旋流器的主要结构特性、操作特性及分离性能,并归纳了动态水力旋流技术在应用中的一些研究结论。     

一种小型动/静态双坐标感知系统结构设计

针对提高被动式热释电红外(PIR)传感器的探测距离和范围,提出动/静态双坐标感知系统理论,根据动/静态双坐标感知系统对动态目标实现一定距离内和全范围探测的要求,光学基准传递的要求,提出了小型动/静态双坐标感知系统的结构设计方案。该系统配用红外透镜作为其光学装置,在匀速转台的带动下,实现360°全范围探测红外信号,解决了PIR传感器探测距离和探测视场的矛盾,拓宽了PIR传感器的使用领域。经过实验验证,该系统结构设计合理。     

基于无线传感器网络的静力载荷测控仪

针对以往静力载荷实验需要大量布线的麻烦,提出了基于无线传感器网络(WSN,wireless sensor networks)的静力载荷测控仪,所有传感器节点组成一个仪器网络。仪器所有的在前端测控仪实验数据通过WSN上传到基站。基站再将数据通过GPRS上传到远程监管中心。实现了每个基站可以同时管理多个前端测控仪,多组试验同时进行。整个系统组成的仪器网络实现了对试验的自动控制,在试验过程中能够快速、实时上传数据,节省了大量的人力、物力和财力。利用WSN进行通信也节省了大量布线的麻烦。