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动能的相对性
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作者 周祥基 《兰州教育学院学报》 2000年第3期48-50,64,共4页
在非惯性系中定义一个动能 ,可比较方便的解决两体问题。本文就此做了一些探讨 ,主要内容有 :(1 )动能也是属于一个系统的 ;(2 )属于系统的动能应用 12 μv2来定义 ;(3)用12 μv2 定义的动能定理 ;(4)
关键词 动能相对性 折合质量 非惯性系 动能定量 系统 1/2μu^2
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Establishment of wear model and life prediction of drum of hot rolling coiler
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作者 章健 彭艳 +1 位作者 刘宏民 刘云飞 《Journal of Central South University》 SCIE EI CAS 2011年第6期1808-1812,共5页
For the drum of hot rolling coiler is prone to be easily destroyed, the type of MMU-5G abrasion tester was applied to revealing the friction and wear behavior. The morphology observation by scanning electron microscop... For the drum of hot rolling coiler is prone to be easily destroyed, the type of MMU-5G abrasion tester was applied to revealing the friction and wear behavior. The morphology observation by scanning electron microscope (SEM) demonstrates the wear mechanism of the drum, and the test data of the influence coefficient of the normal pressure, relative sliding speed and surface lubrication conditions acted on the linear rate of the wear could be obtained by the regression method. A calculation model, which considers the factors of the structure of the drum, coiling tension and coiling strip specifications, was established by the combination method to predict the wear life of the drum. Then the practical production data was applied into this model and the analysis result was in good accordance with that of actual production. 展开更多
关键词 DRUM wear mechanism combination method wear model wear life
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