Research Article
Theoretical Studies on the Longitudinal Inhomogeneity of Track Stiffness and a Track Status Estimation Method
Table 2
Main parameters of the railway tracks used in the simulation.
| | Notation | Parameter | Value |
| | Elastic modulus of the rail (N/m2) | 2.059 × 1011 | | Mass of the rail per unit length (kg/m) | 60.64 | | Torsional inertia of the rail (m4) | 3.741 × 10−5 | | Rail second moment of the area about the Y-axis (m4) | 3.217 × 10−5 | | Rail second moment of the area about the Z-axis (m4) | 5.24 × 10–6 | | Fastener stiffness in the vertical direction (N/m) | 4.0 × 107 | | Fastener stiffness in the lateral direction (N/m) | 1.5 × 107 | | Fastener damping in the vertical direction (N s/m) | 5.0 × 104 | | Fastener damping in the lateral direction (N s/m) | 5.0 × 104 | | Equivalent lateral stiffness coefficient of the CAM (N/m) | 6.5 × 107 | | Equivalent vertical stiffness coefficient of the CAM (N/m) | 2.4 × 108 | | Equivalent lateral damping coefficient of the CAM (N s/m) | 3.1 × 104 | | Equivalent vertical damping coefficient of the CAM (N s/m) | 5.4 × 104 |
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