Demonstration Test on Treatment Solution Against Rail Corrugation Occurs at DTVI_2 Fastener Track Sections in Beijing Metro

DTVI_2 fastener is the most common used fastening system in Beijing Metro, and demonstrated as a stable system by long term usage. However, unexpected rail corrugation occurs on DTVI_2 fasteners sections in a new open metro line. In order to provide a treatment solution for this unexpected problem, tuned rail damper('TRD' for short) is proposed to suppress the growth of rail corrugation by installing. The demonstration test track is conducted in a section of Beijing Metro Line 6, which is suffering serious rail corrugation. TRDs are mounted at both sides of rail in the test track section, while the rail remained the original state in the control section. A measurement campaign is conducted to compare the direct rail frequency response prosperities and the decay rate of track for both sections. The results indicate that the dynamic properties of DTVI_2 fastener track are optimized by TRD. For one side, some resonant peaks(such as the vertical resonant peak at 209 Hz and the transverse peak at 845 Hz etc.) are