Analysis of vibration transmissibility of railway vehicles while transiting curves with lateral track irregularity

Abstract

This paper describes an investigation into the vibration characteristics resulting from lateral track irregularities that are transferred and become lateral vehicle vibrations when a railway car transits a curved section of track. These transfer characteristics are derived via vehicle dynamics simulations that take into consideration nonlinear characteristics such as flange contact between the wheels and rail. The derived results revealed that the transmissibility of wheel-set lateral movement from lateral track irregularity is larger on a curved section of track than that on a straight section due to restrictions between the wheel flange and rail. Consequently, the mechanism of vibration transfer that occurs when a railway vehicle is transiting a curved section of track can be theoretically explained.

Keywords

• vehicle dynamics
• railway
• bogie
• wheel-set
• lateral vibration
• transmissibility