用灰色理论和神经网络理论建立陀螺漂移模型初探

本文就灰色理论和神经网络技术在建立陀螺漂移模型上的应用进行了初步探讨；介绍了这两种理论工程应用上的方法和特点以及相关的一些问题。     

基于郭仲衡先生现代张量分析及有限变形理论知识体系的相关研究

作为我国理性力学先驱之一的郭仲衡先生在其所著《张量(理论和应用)》以及《非线性弹性理论》中记述了现代张量分析以及有限变形理论知识体系.本文按有限维Euclid空间上微积分以及一般赋范线性空间上微分学认识相关知识体系的理论框架,相关思想及方法,阐述了有关思想及方法的发展及其应用.本文未涉及现代几何学在连续介质力学中的应用.     

竖向力作用在粘弹性土体内部时的解答与应用

选择三参量固体模型描述土体的粘弹性本构关系,利用半空间体内部受竖向集中力的Mindlin弹性解,根据粘弹性理论中的准静态弹性-弹粘性对应原理,推导了竖向力作用在粘弹性半无限土体内部的理论解。通过对应力和位移解答进行Laplace逆变换,给出了应力与位移的时域解。作为解答的应用,建立了粘弹性半无限体内部矩形面积上作用有三角形分布、均匀分布荷载时的粘弹性沉降计算公式。为了便于计算与工程应用,根据粘弹性理论解编制了计算程序。结果验证和实例分析表明,文中理论解是正确的,并为工程实际应用提供了理论依据。     

《热弹性学》

热弹性学是研究热对弹性固体的形变和应力影响的一门学科。最近三十年来,热弹性学有了很大发展,它的基本理论业已确立,且成功地解决了许多工程上的问题。由李灏和颜汉洪编译,湖北教育出版社出版的《热弹性学》一书即将出版,就要和读者见面了本书主要根据H. Parkus的《热弹性学》和J. L. Nowinski的《热弹性学的理论与应用》两专著,编译介绍了热弹性学的基本理论和应用。全书包括线性理论、二维问题、     

双层镀体系摩擦性能的研究

本文在单层镀体系摩擦理论的基础上,以锡膜-和铜膜-铅基体为理论模型,探讨了双层镀体系的摩擦学理论。按此理论的结果,可利用双层镀方法将单层镀中硬膜软基体体系的摩擦峰削平,而使双层镀材料的摩擦曲线显得平稳。还指出硬膜上镀软膜比在膜与基体间插入硬膜更有效。这一理论在工程上很有应用价值。     

非线性应力波传播理论的发展及应用

应力波传播理论是分析结构和材料在爆炸/冲击载荷作用下的响应及破坏特性的基础,在国防和民用工程上有重大价值。本文对作者们近半个世纪来在非线性应力波传播理论的发展及其工程应用方面所开展的主要研究作一回顾和讨论,包括：几类非线性应力波相互作用及失效,非线性粘弹性波传播理论及应用,动态破坏和应力波相互作用,以及应力波理论在防护工程中的应用等。     

空气弹簧在大型洗衣机隔振设计中的应用

本文论述了空气弹簧在大型洗衣机脱水工况的隔振设计中的应用.文中详细论述了空气弹簧的力学特性及有关隔振理论,并用机械阻抗法推导了隔振效率,振动幅值及最佳阻尼等公式.最后给出了空气弹簧在国产 XT260大型洗衣机上的应用效果.     

第5届应力波理论在桩基上的应用国际会议

第５届应力波理论在桩基上的应用国际会议（１９９６年９月１１—１３日,美国佛罗里达）第５届应力波理论在桩基上的应用国际会议于１９９６年９月１１—１３日在美国佛罗里达州的奥兰多举行．该会议每４年召开一次．头两次会议在瑞典斯德哥尔摩召开,并均由瑞典土工研究...      

工程力学矢量的规范表示与弹性力学的不变性

通过引入规范变换，消除了工程力学矢量数学表示上的物理缺陷，使规范化力学矢量与力学张量具有物理上的等价表示，从而奠定了不变性弹性力学的基础，为它在不同坐标下的具体应用提供了理论保障。     

双参数地基上圆（环）板轴对称稳态振动的解析解

本文应用贝塞尔函数理论，根据不同的ω值获得了双参数地基上圆（环）板轴对称稳态振动的解析解。最后，给出了一些计算结果。     

Measuring the coal dust flow in burner pipes

 The results presented give an insight in the coal dust volume measuring system used at the Wilhelmshaven power plant. Two new measuring systems for measuring coal dust volumes and coal dust distributions have been investigated as port of a test. The comparison with a recognised isokinetic process of E.ON Engineering has shown that both measuring systems can measure coal dust volumes in states of inertia. However, the relative evaluation gives a better correspondence of the measured values, because cross-influences (not known to some extent) are not included in the measurement in the first approximation. The analysis of the load following behaviour shows that each measuring system supplies plausible values for itself. However, a comparison of the two shows that there can be considerable differences in individual burner pipes which cannot always be adequately explained at the end of the day. The plausibility check is if critical importance in individual cases. In view of the generally positive experience with the coal dust volume measurements, the Wilhemshaven power plant is in the process of equipping the complete unit with a measuring system of this type. Received on 15 March 2001     

用热线风速仪同时测量流场速度与温度

本文对流体力学实验研究中广泛使用的热线风速仪常用的测温和测速方法进行了改进，提出了一种同时测量流场速度与温度的方法。与分时测量相比，此方法具有较高的准确性。因此，本方法将有助于全面分析速度场与温度场的相互影响与关系。     

Application of the strain-phase-shift method for the determination of damping in metals

The method and experimental procedure for measuring metals' damping capacity (an inelasticity characteristic) through the phase difference between axial and transverse strains (strain-phase-shift method) is presented. The effect of each measuring system element on the phase shift is estimated, and procedures of its elimination or consideration are proposed. The features of the method are illustrated by the example of measuring the damping capacity of carbon steel 20 and Mn−Cu alloy specimens subjected to static tensile stresses. The data are correlated with the corresponding damping characteristics of the same metals obtained by the free damped oscillations method.     

精密离心机动平衡测试新方法的研究

提出了一种新的动平衡测试方法,即在精密离心机机座下放置三个地脚,用一个测力传咸器代替其中一个地脚,分析了测力传感器的输出信号,静态测试测得静不平衡,对静不平衡在双校正面上进行了分离,后,动态测试测得偶不平衡,对偶不平衡在双校正面上也进行了分离,该测试方法大提高了动平衡的精度,同时,硬支承刚性转子情况下,动平衡测试的一般方法难以达到高精度动平衡的要求,而这一问题在本文得以解决。     

反馈控制感应同步器双相激磁电源研究

本文对转台测角系统感应同步器双相激磁电源进行分析，用反馈方式抑制漂移误差，提高测角系统的精度和稳定性。经实验验证，这个方案是成功的。     

Dynamic strain measurement with the interferometric strain gage

The interferometric strain gage has a short gage length, high-frequency response and the capability of measuring large plastic strains. Furthermore, the gage is easily ruled directly onto the specimen, and no mechanical or electrical contact needs to be made during the measurement. These features make the interferometric strain gage particularly suitable for dynamic plastic-strain measurement. In this paper, the details of an experimental setup for generating and measuring dynamic plastic strain are given. The photometric techniques of measuring the fringe motion of the interference patterns are describle as well as the data-reduction procedure. A typical result is presented, and the validity of the method is established.     

Ag—Cu／Ti纳米双层膜结合强度测试方法研究

用粘结法（拉伸法，扭转法，断裂力学方法等）和划痕法分别测试了Ag-Cu/Ti纳米双层膜的结合强度，并对其实验结果进行了分析，对比和讨论。结果表明，粘结法由于受胶粘剂粘结强度的限制，只能适用于中低结合强度测试；划痕法适用于软金属薄膜结合强度测试，尤其对高结合强度的薄膜特别有效，而且能测出双层膜及多层膜中膜－膜界面的结合强度和膜基界面的结合强度。     

A numerical method for determining the shear stress of magnetorheological fluids using the parallel-plate measuring system

This work proposes a new numerical method for determining the shear stress, which does not need any preassumption about the exact behavior of the fluid to achieve absolute data using a parallel-plate measuring system. The ability for representing different behaviors along the entire shear-rate range makes this method particularly interesting for the study of magnetorheological (MR) fluids. In this work, the conversion factors used by the rheometer for concentric-cylinder, cone-plate, and parallel-plate measuring systems are first analyzed. This analysis shows that the software used by the rheometer is not appropriate for the quantitative characterization of non-Newtonian fluids using the parallel-plate measuring system. Therefore, a new method for conversion of the parameters measured by the rheometer to the rheological parameters of the fluid is proposed; simultaneously, this new method is compared with other correction methods proposed in the literature: the Rabinowitsch-type method and the single-point method. Finally, the proposed method is applied for the quantitative characterization of an MR fluid.     

转台测角系统标定方法的研究

本文提出一种高精度转台测角系统标定的新方法，该方法以光电自准直仪作为标定基准，用齿盘、多面棱镜作角度给定，转台工作在速率状态下，自动完成高精度转台测角系统标定任务，给出标定精度和误差曲线。该方法避免了人为因素造成的测量和计算误差，使标定过程更加快捷、准确、可靠。     

Analysis of the Influence of the Thickness and the Hole Radius on the Calibration Coefficients in the Hole-Drilling Method for the Determination of Non-uniform Residual Stresses

Experimental Mechanics - The Hole-Drilling method is a semi-destructive technique useful for obtaining residual stress distributions by drilling and measuring relieved strains. The standard for...