Research on Noise and Vibration Reduction of Damped Wheel-Rail

Abstract

The vibration and noise are the main hazards of rail transit. In order to achieve the purpose of reducing vibration and noise, we employ the constrained damping method on the wheel and rail; use finite element software to set a finite element model of standard wheel rail and damped wheel rail; then give them harmonic response analysis. The results showed that: the main resonance frequency of the standard wheels is at 2000 ∼ 4000 Hz; the main resonance frequency of the standard rail of is at 800 ∼ 4500 Hz; the reducing vibration effects of the damped wheel-rail are mainly at the centralized area of the resonant frequency response. Compared with the standard wheel and rail, the vibration response peak value of damped wheel-rail has significantly weakened. Under the wheel-rail loading, maximum axial and radial vibration response value of damped wheel-rail is around 30-35% of the standard wheel-rail, with vibration reduction rate up to 65-70%.

Study on Reasonable Fastener Stiffness of Ballastless Turnout's Vibration Decrease and Noise Reduction of 350 km/h Passenger Dedicated Line

“…Generally speaking, the wheel-rail noise played the leading role in 5~200mm wavelength range. As for the high-speed trains which were faster than 200km/h, the wavelength of the roughness greater than 200mm could inspire hundreds of hertz vibration, while the above 100Hz vibration radiation noise could easily be felt [6,7] . The largest wavelength of the roughness in this paper was taken 550mm, as for the train of the speed of 200~350km/h, the minimum frequency of vibration response aroused was the vibration of 100Hz above.…”

A Fractional Calculus for Nonlinear Energy Sink Used in Vibration Absorption System

“…The equations of motion of the system of Figure 1 are given by (1) where x(t) and v(t) refer to the displacement of the LO and of the NES, respectively. Eq.…”

“…Systems comprising linear substructures with essentially nonlinear attachments are intensively studied in the context of vibration mitigation. Transient targeted energy transfer (TET, pumping) of energy from the substructure to the essentially nonlinear attachment (nonlinear energy sink) is demonstrated and studied in [1][2][3]. In the some papers it has been shown that properly designed, essentially nonlinear local attachments may passively absorb energy from transiently loaded linear subsystems, acting as nonlinear energy sink (NES).…”

Analysis of Vibration Reduction Properties of Rail Damping under High-Speed Vehicle Moving Load

“…Field tests about vibration reduction property of rail damping uses on an urban rail transit carried out by Pengbo Wei and He Xia show that the acceleration of the rail waist can be reduced by 6dB with damping rails [2]. Linya Lui analyzed the vibration response of rails with and without damping material on the waist under a constant force, and discovered that rail damping can reduce the vibration of the rail effectively [3]. Nowadays, rail damping has been used in urban rail transit and low-speed railways successfully, but literature focussing on vibration reduction property of rail damping for high-speed railway is not common.…”