基于CorelDRAW与Origin联合应用的制图方法研究

实验结果的图形表达是现代科技交流的主要手段之一. 为使所绘制图形能符合科技期刊规范化出版要求, 探讨了联合应用CorelDRAW和Origin的制图方法. 根据相关图形的特点, 运用Origin软件的数据处理和图形输出功能, 结合CorelDRAW软件的矢量化特点以及某些特性功能, 方便快捷地绘制出符合规范的期刊插图, 并通过实例证明了这是一种简易的制图方法, 可有效地提高期刊的出版质量和效率.     

工艺参数对高铁轴承外圈端面成形质量的影响

为了实现高铁轴承外圈的精确成形, 应用ABAQUS有限元软件, 对不同工艺参数下的冷辗扩轧制过程进行了有限元模拟, 得到了工艺参数对高铁轴承外圈成形质量的影响规律为: 较大的驱动辊转速和芯辊直线进给速度有利于坯料上端面的成形, 较小的轧制比获得的坯料上端面成形质量较好.     

Nonlinear analysis of a rub-impact rotor supported by turbulent couple stress fluid film journal bearings under quadratic damping

This work reports a numerical study undertaken to investigate the dynamic response of a rotor supported by two turbulent flow model journal bearings with nonlinear suspension and lubricated with couple stress fluid under quadratic damping. This may be the first time that analysis of rotor-bearing system considered the quadratic damping effect. The dynamic response of the rotor center and bearing center are studied. The analysis methods employed in this study are inclusive of the dynamic trajectories of the rotor center and bearing center, power spectra, Poincaré maps and bifurcation diagrams. The maximum Lyapunov exponent analysis is also used to identify the onset of chaotic motion. The modeling results provide some useful insights into the design and development of rotor-bearing system for rotating machinery that operates at highly rotational speed and highly nonlinear regimes.     

内燃机轴瓦—曲轴轴颈摩擦副摩擦学性能研究

介绍了为改善内燃机轴瓦－曲轴轴颈摩擦副摩擦学性能所研制的电刷镀Pb-Sn-Cu三元合金工艺和硫氮钒共渗新工艺,并研究了其摩擦学性能和配副性,试验结果与表面形貌分析结果表明,电刷镀Pb-Sn-Cu合金镀层能有效地提高轴瓦的疲劳强度,硫氮钒共渗层能明显地改善曲轴轴颈的 摩擦学性能,且两种强化具有优异的配副性。     

机车轮对轴颈高精度动态检测技术的研究

通过对线阵CCD成像系统的研究,提出了机车轮对轴颈磨损的CCD成像拼接动态检测方法,分析了该方法的可行性.讨论了斜光束照射、背景光强变化等因素,这些因素降低了系统的测量精度.最后通过实验系统证明了该方法的可靠性.     

《新疆大学学报》2000～2002年载文统计与分析

采用文献计量学的方法，对《新疆大学学报》(自然科学版)2000～2002年所发表的论文及其引文进行了统计分析，从而对该刊作出客观的评价，从一个侧面反映了新疆大学科研现阶段状况。     

科技期刊综合定量评价分类探讨

根据美国科技情报研究所出版的《期刊引用报告》的有关数据，对其中收录期刊进行定量评价，采用３项评价指标，用层次分析法确定指标的权重，建立指数分析模型，按综合指数的大小进行排序并分类，最后用数理统计方法对评价分类结果进行校验，得到满意的结果。     

自润滑轴承失效原因的XPS分析

用Ｘ射线光电子能谱仪（ＸＰＳ）对失效前后的自润滑轴承各部件表面的化学组成及其状态进行了分析，结果表明失效前后表面性质差异较大，失效是由于自润滑膜破损耗尽所致。     

Simulation on topography of superfinished roller surfaces

As a final process in roller bearing manufacturing, Through Centerless Superfinishing is of great importance to the performance of bearings. Applied loads, rotational speeds, reciprocating frequencies and amplitude of superfinishing stones are crucial parameters, which mainly influence the surface topography, and are difficult to be adjusted to achieve optimal superfinishing effect, so product quality is unstable in practice. A superfinishing model is firstly established, which includes cutting and motion models. And then a simulation method is presented to form the topography on the condition of various combinations of the above three parameters, the effect of every parameter on the topography being clarified. This work provides a useful means to select reasonable combination of superfinishing parameters for roller bearing buildings.     

轴向数控磁力轴承系统的研究

本文建立了轴向磁力轴承的动力学方程和数学模型 ,阐述了基于数学模型分析的数字控制系统的设计方法 .介绍了本课题设计的新型数字控制系统 .试验表明该系统具有较好的控制稳定性和运转稳定性 ,具有较强的承载力 .