Elastic Cylindric Shell Hydrodynamic Gas Bearing Supported by Wave-formed Foil (Bump Foil) (Ⅱ)——The Frictional Power Loss Test and Its Parametric Investigation
Plane elastic problems of different media with cracks on the interface
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The equilibrium problem for the infinite elastic plane consisting of two different media with many cracks on the interface is discussed.
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An existence theorem of positive solutions for elastic beam equation with both fixed end-points
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This class of BVP's usually describes the deformation of the elastic beam with both fixed end-points.
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It has been shown that shear failure of undisturbed soils approximately indicate plastic failure, while shear failure of remolded soils is of the elastic nature.
A mechanical impedence method is described to predict the natural frequences of elastic beam under the condition of dynamic supporting with the example of helicopter tail rptor. When two elastic components are connected at one point, it is sufficient to know the undamped impedence data of two connected components at the junction point ( determined by measurement or calculation) . It follows that the natural frequences of complete system not only reflect the natural frequences of elastic be...
The direct and indirect influence factor used in calculating the reaction of any bearing and the displacement of any location for an elastic beam possessing many elastic bearings have been developed and used to analyse how the bearing reaction moment of force influences the radial static rigidity of spindles mounted in two bearings, with emphasis placed on the optimum bearing span and the position of the driving element. The results obtained are expanded to spindles mounted in three bearings.
In belt driving, the practical rotational speed of a driven wheel is less than its theoretical speed owing to the existence of the elastic creep. However, the explanation of this problem was too general and ambiguous and often caused much misunderstanding.The method of graphical analysis of speed is used in this article to make qualitative analysis of the driving wheel, the driven wheel and the belt speed separately. The presentation is simple and easy to understand and the concepts of physical scienc...