Measurement and simulation analysis of the influence of fastener stiffness on rail corrugation in curved metro sections
Rail corrugation is one of the typical diseases of metro.To suppress the occurrence of rail corrugation,this arti-cle tested the characteristics of rail corrugation and fastener stiffness on a metro line.Based on the theory of friction self-excited vibration,the influence of fastener stiffness on rail corrugation was studied.Based on the measurement and simula-tion results,control measures for rail corrugation were proposed.The effectiveness of the treatment was evaluated through subsequent testing.The research results indicate that there is rail corrugation with a typical wavelength of 40 mm～60 mm on this line.The rail corrugation of inner rail is more serious.The unstable vibrations are more likely to occur between the inner wheelset and rail.The frequency is 445.38 Hz.By increasing the vertical lateral stiffness of the fasteners,the un-stable vibration is suppressed and the track dynamic response at frequencies of 400 Hz and 800 Hz is reduced.After one year of corrugation treatment,there is no significant increase in the amplitude of rail irregularity.The research results can provide a reference for the control of rail corrugation on existing lines and the prevention of rail corrugation on new lines.
万方数据
维普
