A theoretical investigation of the use of 2 k factorial analysis to determine the effects of dimensional manufacturing tolerances on the stability of hydrodynamic journal bearing systems
A theoretical investigation of the use of 2 k factorial analysis to determine the effects of dimensional manufacturing tolerances on the stability of hydrodynamic journal bearing systems
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DOI：
10.1177/1350650111408180
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发表时间：
2011-08
期刊：
影响因子：
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通讯作者：
P. Ogrodnik;W. Xu;M. Goodwin;G. Bancroft
中科院分区：
文献类型：
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作者：
P. Ogrodnik;W. Xu;M. Goodwin;G. Bancroft
在真实的流体动压滑动轴承系统中，制造公差和设计参数的偏差是不可避免的。通常，系统的稳定性仅根据设计参数进行评估;偏差的影响被假定为可忽略不计，仅考虑总体变化的影响。单独而言，单个偏差可能不会表现出显著影响，但与其他偏差结合时，影响可能很大。这项研究提出了一个2K析因分析的制造公差对系统稳定性的影响。它还用于确定哪个公差或公差组合最重要。结果表明，制造公差，以及其后的组合，对系统的稳定性有显着的影响，他们以不同的方式影响系统的稳定性。该研究还确定了系统稳定性对偏差不敏感的区域。为了使可视化的效果，修改索末菲数和新的稳定性地图。此外，使用“实验设计”的方法来确定系统的稳定性的整体理念已被证明是正确的。稍后的一篇论文将把这项研究的结果与实验结果进行比较。
Manufacturing tolerances and deviations from design parameters are inevitable in real hydrodynamic journal bearing systems. Normally, the stability of the system is assessed on the design parameters alone; the effects of deviations are assumed to be negligible and only the effects of gross changes are considered. In isolation, a single deviation may not demonstrate a significant effect, but in combination with other deviations, the effect may be large. This study presents a 2 k factorial analysis of the effects of manufacturing tolerances on system stability. It is further used to determine which tolerance, or combination of tolerances, is the most significant. The results show that manufacturing tolerances, and combinations thereafter, do have a significant effect on system stability, and they influence the system stability in different ways. The study also identified a region where system stability is insensitive to deviations. To enable visualization of the effects, a modified Sommerfeld number and new stability map are presented. Furthermore, the overall philosophy of using a ‘design of experiments’ approach to the determination of system stability has been vindicated. A later paper will compare the results from this study to those from experimental results.