simulation of torsion moment at the wheel set of the railway vehicle ...

REVIEWFig. 4 Transformation of the circle c 0i into the circle c i4. Classification of cyclical surfaces of the typeP g 2(u,v), P g 3 h (u,v)The two-revolution cyclical surface of the type P g 2(u,v) can beclassified according to the index g:Table 1: Classification of cyclical surfaces of the type P g 2(u,v)g t n bP t2(u,v) P n 2(u,v) P b 2(u,v)The three-revolution cyclical surface of the type P g 3 h (u,v) canbe classified according to the index g and h:Table 2: Classification of cyclical surfaces of the type P g 3 h (u,v)g/h t n btP t3 t (u,v) P t3 n (u,v) P t3 b (u,v)n P n 3 t (u,v) P n 3 n (u,v) P n 3 b (u,v)5. Illustrations of cyclical surfaces of the typeP 1 (u,v), P g 2(u,v), P g 3 h (u,v)In Fig. 5 there are displayed three combinations of cyclicalsurfaces of the type P 1 (u,v), P t 2(u,v), P t 3t (u,v) in fig. a), P 1 (u,v),P t 2(u,v), P t 3n (u,v) in fig.b), P 1 (u,v), P t 2(u,v), P t 3b (u,v) in fig. c).In Fig. 6 there are displayed three combinations of cyclicalsurfaces of the type P 1 (u,v), P n 2(u,v), P n 3t (u,v) in fig. a), P 1 (u,v),P n 2(u,v), P n 3n (u,v) in fig. b), P 1 (u,v), P n 2(u,v), P n 3b (u,v) in fig. c).In Fig. 7 there are displayed three combinations of cyclicalsurfaces of the type P 1 (u,v), P b 2(u,v), P b 3t (u,v) in fig. a), P 1 (u,v),P b 2(u,v), P b 3n (u,v) in fig.b), P 1 (u,v), P b 2(u,v), P b 3b (u,v) in fig. c).The surfaces mentioned above can be used in design practiceas constructive or ornamental structural components.The paper was supported by the grant VEGA 1 / 4002 / 07.b P b 3 t (u,v) P b 3 n (u,v) P b 3 b (u,v)a) b) c)Fig. 5 Combinations of cyclical surfaces for g tCOMMUNICATIONS 3/2008 ●75