Trapezoidal sleeper track structure with passive dynamic vibration reduction

Abstract

Provided is a passive type power vibration reduction trapezoidal sleeper track structure. Vibration components close to inherent frequency of the track structure are reduced, and harmful vibration of the track structure at a frequency band is eliminated. The passive type power vibration reduction trapezoidal sleeper track structure comprises a pair of longitudinal trapezoidal sleepers (101) which are at intervals horizontally and are arranged on a supporting base (106), the pair of trapezoidal sleepers (101) is connected to be a whole through connecting elements (102) arranged in the line extension direction at intervals, and steel rails (104) are fixed on the trapezoidal sleepers (101) through fasteners (105). The passive type power vibration reduction trapezoidal sleeper track structure is characterized in that additional mass blocks (103) are arranged on the trapezoidal sleepers (101) or the supporting base (106) in the line extension direction at intervals and elastically connected with the trapezoidal sleepers (101) or the supporting base (106) through elastic components.

Description

Technical field [0001] The invention relates to a railway building component, in particular to a trapezoidal sleeper track structure with passive dynamic vibration reduction. Background technique [0002] The trapezoidal sleeper track is composed of steel rails, fasteners, trapezoidal sleepers and supporting foundations. The trapezoidal sleeper is formed by connecting a pair of longitudinal reinforced concrete beams and transverse steel pipes arranged at certain intervals along the longitudinal direction. It is shaped like a "ladder", hence the name. Because the trapezoidal sleeper beams are laid continuously along the longitudinal direction of the steel rail, not only the longitudinal bending stiffness of the rail frame is increased, and the running stability is improved, but the distribution of the train load borne by the ballast is improved, thereby reducing the train load. Track deformation caused by repeated actions has been widely used in urban rail transit at home and abro...

AI Technical Summary

Problems solved by technology

Due to the limit and cost of the railway infrastructure, the vibration reduction effect brought about by the increase in mass is limited; if the stiffness of the track structure is reduced, the natural frequency can be reduced, but if the stiffness is reduced too much, the displacement of the track structure will increase, causing the train Therefore, it is no longer possible to further reduce the impact of vibration in the low frequency range through the above forms

[0004] When the subway train passes through buildings with high vibration reduction requirements, such as scientific research institutions, concert halls, hospitals, military facilities, museums and ancient buildings, the low-frequency vibration components not only easily cause fatigue damage to the structure, affect the life of the equipment, but also affect The operating environment of properties such as museums above the railway and the working accuracy of precision instruments and meters along the line can easily lead to the failure of electrical components and automatic control systems. At the same time, vibration will inevitably generate noise, which will affect the work and physical and mental health of surrounding personnel.

Images