Hydrodynamic Lubrication 2009 Part 5 potx

... given by Eqs. 5. 37 – 5. 42, the actual calculations show that Eq. 5. 58 of the Routh–Hurwitz criterion always holds, and if Eq. 5. 59 holds, Eq. 5. 60 always holds. Therefore, only Eq. 5. 59 need be ... Thus, substitution of Eqs. 5. 49 and 5. 50 into Eqs. 5. 47 and 5. 48, respectively, use of the oil film force for small vibrations Eqs. 5. 32 and 5. 33, and additional use of Eq....

Ngày tải lên: 11/08/2014, 08:21

... % Newtonian fluid 610 ,5 1 05, 9 0,023 45 4,416 280,3 1,93 0 Structural-viscous liquid (28) 51 8,4 102,6 0,0 251 2 3, 75 309,8 1 ,52 16,9 Structural-viscous liquid (29) 53 9,0 103,4 0,0246 3,789 ... min inf h , μ m * α , % Newtonian fluid 610 ,5 1 05, 9 0,02 355 4,416 280,3 1,93 0 Structurally heterogeneous fluid (30) 727,4 110,6 0,02 15 5,84 237,9 2,9 0 Table 2. The re...

Ngày tải lên: 19/06/2014, 15:20

... Figure 5. 25 shows the results of repeated calculations of about 350 0 steps (lasting 7 seconds), the time step being 1 /50 of the natural frequency of the shaft (Hori et al. [55 ]). Figure 5. 25a shows ... and Hori [52 ] [53 ], Hori and Kato [55 ] [57 ]). 5. 4.2 Examples of Simulation a. Response to a Sinusoidal Disturbance Let us consider a rotor system with the following parameters: L...

Ngày tải lên: 11/08/2014, 08:21

... load P 0 = 5. 25, linear stability limit M c = 36 .51 d ij j = 1 = 2 = 3 = 4 i = 1 3.4 255 1.2681 5. 9031 -2.1143 = 2 -2.4468 0.9712 -2.1143 2 .57 70 = 11 = 12 = 22 = 13 = 14 = 23 = 24 23. 259 5 -0.1478 ... 78, 1 956 , pp. 9 75 - 983. 12. V.T. Morgan and A. Cameron, “Mechanism of Lubrication in Porous Bearings”, Proceed- ings of Conference on Lubrication and Wear, IMechE, London, 1 9...

Ngày tải lên: 11/08/2014, 08:21

... calculated results and experiments (single cylinder head) [ 15] . a foil width 2 .54 cm, head radius 5. 0 cm, wrap angle 8 ◦ , foil velocity 15. 7 m/s, foil tension 0.167 kg/cm. b wrap angle 10 ◦ , the ... if x > 5. Namely, the position x = 5 is considered to be ”far enough.” And this is ”not too far.” Because calculaton shows that Reynolds’ number at the position x = 5isless than 50...

Ngày tải lên: 11/08/2014, 08:21