The purpose of the present study is to establish a mixed lubrication model for the journal-thrust coupled microgroove bearings(also referred as coupled bearings)used for the ship shaftless rim-driven thrusters.During ...The purpose of the present study is to establish a mixed lubrication model for the journal-thrust coupled microgroove bearings(also referred as coupled bearings)used for the ship shaftless rim-driven thrusters.During the hydrodynamic modelling,the coupling hydrodynamic pressure between the journal bearing and the thrust bearing is considered.The mixed lubrication performances of the microgroove journal-thrust bearing with five different bottom shapes,including rectangle,semi-ellipse,right triangle,isosceles triangle and left triangle,are compared.Based on the numerical results,the optimal microgroove bottom shape of the journal bearing and tilting angle of the thrust pad are determined.Additionally,the comparative analysis shows that the coupled bearing with left triangle microgroove bottom shape exhibits the optimal mixed lubrication performance.The numerical result also indicates that the optimal inclination angle of the thrust bearing pad is 0.01°for the current simulation case.展开更多
深入到《中国最强音》的幕后,会发现它有两个倾向特别清晰。一个是宏大叙事,想往"大国、强国、中国梦"上靠。与同类节目一样,它也要完成一个故事,一个草根歌手来了,梦想成真,可是在这里他又不只是梦想成真,得往大里想,他实现...深入到《中国最强音》的幕后,会发现它有两个倾向特别清晰。一个是宏大叙事,想往"大国、强国、中国梦"上靠。与同类节目一样,它也要完成一个故事,一个草根歌手来了,梦想成真,可是在这里他又不只是梦想成真,得往大里想,他实现了"共同享有人生出彩的机会"。另一个是重商主义,与国外著名娱乐节目《The X Factor》版权合作,倾尽全力,精耕细作,工业化、标准化,想把国内电视娱乐节目带到一个新高度。一定要轰动效应,轰动效应才能导致商业成功。两个倾向交叉的部分,就是章子怡、陈奕迅、罗大佑和郑钧的加盟。大牌一定对吗?这个考虑放在后边。两个倾向冲突的部分,就造成了节目质量的尴尬——至少是前期节目质量的尴尬。当然这是简明的观察方法,方法之一,并不排它。娱乐业、电视,在中国都是颇为暧昧的领域。展开更多
基金Project(51975064)supported by the National Natural Science Foundation of ChinaProject(cstc2018jcyj AX0442)supported by the General Projects of Basic Science and Frontier Technology Research of Chongqing,China+2 种基金Projects(2018M631059,2019T120805)supported by the Postdoctoral Science Foundation of ChinaProject(cstc2017zdcyzdzx X0001)supported by the Major Research and Development Program of ChinaProject supported by the Innovation Program on the Common and Key Technologise of Key Industries,China。
文摘The purpose of the present study is to establish a mixed lubrication model for the journal-thrust coupled microgroove bearings(also referred as coupled bearings)used for the ship shaftless rim-driven thrusters.During the hydrodynamic modelling,the coupling hydrodynamic pressure between the journal bearing and the thrust bearing is considered.The mixed lubrication performances of the microgroove journal-thrust bearing with five different bottom shapes,including rectangle,semi-ellipse,right triangle,isosceles triangle and left triangle,are compared.Based on the numerical results,the optimal microgroove bottom shape of the journal bearing and tilting angle of the thrust pad are determined.Additionally,the comparative analysis shows that the coupled bearing with left triangle microgroove bottom shape exhibits the optimal mixed lubrication performance.The numerical result also indicates that the optimal inclination angle of the thrust bearing pad is 0.01°for the current simulation case.
文摘深入到《中国最强音》的幕后,会发现它有两个倾向特别清晰。一个是宏大叙事,想往"大国、强国、中国梦"上靠。与同类节目一样,它也要完成一个故事,一个草根歌手来了,梦想成真,可是在这里他又不只是梦想成真,得往大里想,他实现了"共同享有人生出彩的机会"。另一个是重商主义,与国外著名娱乐节目《The X Factor》版权合作,倾尽全力,精耕细作,工业化、标准化,想把国内电视娱乐节目带到一个新高度。一定要轰动效应,轰动效应才能导致商业成功。两个倾向交叉的部分,就是章子怡、陈奕迅、罗大佑和郑钧的加盟。大牌一定对吗?这个考虑放在后边。两个倾向冲突的部分,就造成了节目质量的尴尬——至少是前期节目质量的尴尬。当然这是简明的观察方法,方法之一,并不排它。娱乐业、电视,在中国都是颇为暧昧的领域。
