Vibration Monitoring and Diagnosis of Pipe-line Pumps on Offshore Platforms

ＶｉｂｒａｔｉｏｎＭｏｎｉｔｏｒｉｎｇａｎｄＤｉａｇｎｏｓｉｓｏｆＰｉｐｅｌｉｎｅＰｕｍｐｓｏｎＯｆｓｈｏｒｅＰｌａｔｆｏｒｍｓＺｈｅｎｇＷｅｎＴｅｃｈｎｏｌｏｇｉｃａｌＦａｃｕｌｔｙｏｆＭａｉｎｔｅｎａｎｃｅＥｎｇｉｎｅｒｉｎｇＧｕａｎｇｚｈｏｕ...     

溶液老化对化学镀镍层耐蚀性的影响

化学镀镍液的老化能对其镀层性能产生重大影响。随着镀液的使用,硫酸盐、亚磷酸盐及其他盐都积累起来而开始影响镍、磷的沉积,从而使镀层的内应力、孔隙率增大而耐化学性下降。本文叙述了为使化学镀镍液老化对镀层性能的影响定量化而进行的一系列试验与结果,叙述了为确定亚磷酸盐、硫酸盐的影响而作的试验并对所观察到的变化提出可能原因。     

A Neural Network Method for Traffic Dispersion

１ＩｎｔｒｏｄｕｃｔｉｏｎＴｒａｆｉｃｄｉｓｐｅｒｓｉｏｎ［１］，ｗｈｉｃｈｍｅａｎｓｔｈｅｔｒａｆｉｃｉｓｄｉｓｔｒｉｂｕｔｅｄｏｖｅｒｍｕｌｔｉｐｌｅｐａｔｈｓａｎｄｔｒａｎｓｍｉｔｅｄｉｎｐａｒａｌｅｌ，ｉｓｕｓｅｄｔｏｉｍｐｒｏｖｅｔｈｅｎｅ...     

EFFECT OF STREAMLINE CURVATURE AND SOME OTHER CONDITIONS ON THE TURBULENT STRUCTURES IN THE OTHER REGION OF AN OBSTACLE

ＥＦＦＥＣＴＯＦＳＴＲＥＡＭＬＩＮＥＣＵＲＶＡＴＵＲＥＡＮＤＳＯＭＥＯＴＨＥＲＣＯＮＤＩＴＩＯＮＳＯＮＴＨＥＴＵＲＢＵＬＥＮＴＳＴＲＵＣＴＵＲＥＳＩＮＴＨＥＯＴＨＥＲＲＥＧＩＯＮＯＦＡＮＯＢＳＴＡＣＬＥＬｉｕＳｈｉ－ｈｅ（ＷｕｈａｎＵｎｉｖｅｒｓｉｔ...     

AN EXPERIMENTAL AND NUMERICAL INVESTIGATION OF THE STARTING FLOW OF A UNIFORMLY ACCELERATING CIRCULAR CYLIINDER

The starting flow around a uniformly accelerated circular cylinder is investigatedby flow visualization techncque and solving N-S equations numerically in detail.The results ofthe starting flow are similar with those of the impulsively started one.At lower Re_α,numbers the“phenomenon a”is revealed;the“phenomenon β”appears at higher Re_α numbers,but withonly one secondary vortex.At the early stage of the starting vortex formation,the flow islaminar;at the later stage,the flow transforms into turbulent flow.The velocity distribution inthe flow field is measured with the multiwires installment.The calculational results are comparedwith the results of experiment,and both are in agreement with each other.     

NUMERICAL MODEL FOR DYNAMIC SIMULATION OF TRAFFIC FLOW

ＮＵＭＥＲＩＣＡＬＭＯＤＥＬＦＯＲＤＹＮＡＭＩＣＳＩＭＵＬＡＴＩＯＮＯＦＴＲＡＦＦＩＣＦＬＯＷＷｕＺｈｅｎｇ；ＺｅｎｇＬｉ－ｎｏｎｇ（ＤｅｐａｒｔｍｅｎｔＡｐｐｌｉｅｄＭｅｃｈａｎｉｃｓ，ＦｕｄａｎＵｎｉｖｅｒｓｉｔｙ，Ｓｈａｇｈａｉ２００４３３，Ｐ...     

重新关注小型水轮机

重新关注小型水轮机Ｒ．雷诺兹主题词小型水轮机水轮机设计试验研究新方法本世纪初以来．在一些工业化国家逐渐停建５００ｋｗ以下的小水电站。主要原因是：·来自大电厂的压力；·维修费用高；·水力计算不当造成的维修困难；·电力供应充足。在过去的十年中，由于认识到...