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采用成组试验法,对40副航空用16NCD13钢渗碳淬火齿轮进行齿面疲劳强度试验研究,分别在4个应力水平上取得了齿面出现点蚀时和点蚀达到失效判据时的疲劳寿命样本。经统计分析,判明了疲劳寿命的分布规律并对分布参数进行了估计。在此基础上拟合出了置信度为95%、可靠度为99.99%的齿面接触疲劳极限应力值,为这种齿轮的可靠性设计和寿命预测提供了基础数据。 相似文献
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多对齿啮合时载荷分布有限元分析FEMAnalysesforfaceloadDistributioninMultitoothMeshes北京科技大学边新孝,谈嘉祯1。弹性接触问题的数学模型设两弹性体接触,如图1所示。其阴影部分为接触区,并把接触区离散成... 相似文献
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Such characteristics of aluminium strip and foil as soft and thin gauge make tension control one of the key techniques for automation gauge control(AGC). To avoid the disadvantage of traditional mathematical control method which is unfitful for nonlinear hysteresis, the technique for tension AGC fuzzy control was developed and thickness deviation more than 3% of product thickness was achieved consequently in 1 350 mm cold rolling mill of aluminium strip and foil. Additionally, because the gauge of aluminium strip and foil is thin, stage-cooling roll method becomes a key technique for profile control. So stage-cooling roll intelligent control method is developed and pre-coated aluminum foil with good profile less than 101 (the relative differences in elongation of 0.01%) is produced using the profile control system in 1 400 mm cold rolling mill of aluminium strip and foil. 相似文献
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