Research Article
An Alternative Solution of Train-Track Dynamic Interaction
Table 1
Main notations adopted in this work.
| | Notation | Physical meaning | Unit |
| | Zc/Zt/Zw | Vertical displacements of car body, frame, and wheelset | m | | βc/βt/βw | Pitch angles of car body, frame, and wheelset | ° | | Mc/Mt/Mw | Masses of car body, frame, and wheelset | kg | | Cpz/Csz | Damping of primary suspension and secondary suspension | N·s/m | | Kpz/Ksz | Stiffness of primary suspension and secondary suspension | N/m | | lt | Wheel base | m | | lc | Length between bogie centers | m | | G | Contact constant of wheel and rail | m/N2/3 | | δZ(t) | Elastic compression deformation | m | | Zw(t) | Wheel displacement | m | | Zr(t) | Rail displacement | m | | Z0(t) | Track irregularity | m | | zr(x, t)/yr(x, t)/ϕr(x, t) | Vertical, lateral and torsional displacements of the rail | m | | mr | Rail mass per unit length | kg/m | | ρr | Rail density | kg/m3 | | Locations of ith fastener and jth wheelset | m | | Ns/Nw | Numbers of fasteners and wheelsets | — | | δ(x) | Dirac delta function | — |
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