Research Article
Study on Steady-State Responses of High-Speed Vehicle Using Infinite Long Track Model
| | Notation | Parameters | Value |
| | Track subsystem | | | | E (N/m2) | Young’s modulus of rail | 2.059 × 1011 | | G (N/m2) | Shear modulus of rail | 7.9 × 1010 | | ρ (kg/m3) | Density of rail | 7860 | | A (m2) | Cross-sectional area | 7.745 × 10−3 | | I y (m4) | Bending moment about y-axis | 3.217 × 10−5 | | κ z | Vertical shear coefficient | 0.5329 | | ρ s (kg/m3) | Density of slab | 2800 | | E s (N/m2) | Young’s modulus of slab | 3.6 × 1010 | | L s × Ds × Hs (m) | Dimension of slab | 4.962 × 2.5 × 0.17 (HD line), 5.6 × 2.5 × 0.2 (ZX line) | | K pv (MN/m) | Rail pad vertical stiffness | 40 | | C pv (kN·s/m) | Rail pad vertical damping | 52 | | K sv (MN/m) | Slab support vertical stiffness | 5000 | | C sv (kN·s/m) | Slab support vertical damping | 300 | | l 0 (m) | Sleeper bay | 0.629 (HD line), 0.63 (ZX line) |
| | Vehicle subsystem | | | | M c (kg) | Carbody mass | 44039 | | M t (kg) | Bogie mass | 2439 | | M ws (kg) | Wheelset mass | 1881 | | I ty (kg·m2) | Bogie pitch moment of inertia | 1846 | | K sz (MN/m) | Vertical stiffness of secondary suspension | 0.24 | | C sz (kN·s/m) | Vertical damping of secondary suspension | 25 | | K pz (MN/m) | Vertical stiffness of primary suspension | 9 | | C pz (kN·s/m) | Vertical damping of primary suspension | 10.5 | | (m) | Wheel radius | 0.46 | | L c (m) | Half distance between two bogie frames | 8.9 | | L t (m) | Half of the bogie wheelbase | 1.25 |
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