Research Article
Insights into Underrail Rubber Pad’s Effect on Vehicle-Track-Viaduct System Dynamics
Table 3
Dynamic parameters of track-bridge structure.
| | Components | Item/symbol/unit | Values |
| | Rail | Elastic modulus (N/m2) | 2.1 e11 | | Moment of inertia of section (m4) | 3.217e − 5 | | Density (kg/m3) | 7850 | | Sectional area (m2) | 7.745e − 3 | | Shear modulus (N/m2) | 7.7e10 | | Section factor (κ) | 0.4 | | Loss factor (ηr) | 0.01 | | Stiffness (MN/m) | Temperature/frequency variant |
| | Fastener | Loss factor | Temperature/frequency variant | | Fastener space (m) | 0.625 | | Elastic modulus (N/m2) | 3.6e10 | | Moment of inertia of section (m4) | 1.7e − 3 |
| | Slab | Density (kg/m3) | 2500 | | Sectional area (m2) | 0.51 | | Loss factor | 0.1 | | Stiffness (N/m) | 3.79e11 |
| | CA mortar | Loss factor | 0.2 | | Elastic modulus (N/m2) | 3.0e10 | | Moment of inertia of section (m4) | 7.3125e − 3 |
| | Base plate | Density (kg/m3) | 2500 | | Sectional area (m2) | 0.975 | | Loss factor | 0.1 | | Stiffness (N/m) | 2.1e11 |
| | Slipping layer | Loss factor | 0.2 | | Length (m) | 32 | | Elastic modulus (N/m2) | 3.6e10 | | Moment of inertia of section (m4) | 11.056 |
| | Viaduct | Density (kg/m3) | 2650 | | Sectional area (m2) | 9.089 | | Loss factor | 0.1 | | Stiffness (N/m) | 6e9 |
| | Viaduct bearing | Bearing spatial interval (m) | 32 | | Loss factor | 0.25 |
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