Passive dynamic vibration-absorbing track plate

Abstract

A passive type power vibration absorption track slab is provided. Vibration components close to inherent frequency of a track structure are effectively reduced, and vibration components of a track slab main body are reduced. The passive type power vibration absorption track slab comprises the track slab main body (10), an additional mass block (20) is arranged in a space area of the track slab main body (10) in non-contact with a steel rail, and the additional mass block (20) and the track slab main body (10) are in elastic connection having the rigidity and damping characteristics. The track slab main body (10) is a track slab, a roadbed slab, a base plate or a floating slab in the track structure.

Description

Technical field [0001] The invention relates to a railway track structure, in particular to a passive dynamic vibration-absorbing track slab. The track slab generally refers to a reinforced concrete slab structure such as a track slab, a track bed slab, a base slab or a floating slab in the track structure. Background technique [0002] As we all know, track slabs are widely used in modern railway construction, mainly to evenly transmit the wheel load from rails and fasteners to subgrades or bridges and tunnels and other under-line basic structures, which can be regarded as located between the train and the under-line foundation. Of a damping system. From the perspective of mechanics, the track structure can be regarded as a mass-spring-damping system. At present, the track structure with the best damping effect is the steel spring floating slab track structure. The first natural frequency of the existing steel spring floating slab track structure is about 12Hz, which is very im...

AI Technical Summary

Problems solved by technology

Due to the limit and cost of railway infrastructure, the increase in the mass of the track slab, which is one of the key components of the track structure, has a limited vibration damping effect; if the stiffness of the track structure is reduced, the natural frequency can be reduced, but the stiffness is too large. The displacement of the track structure will increase, which will bring hidden dangers to the safety of train operation. Therefore, it is no longer possible to further reduce the impact of vibration in the low-frequency range through the above-mentioned forms.

[0003] Low-frequency vibration components are not only likely to cause fatigue damage to the structure and affect the life of the equipment, but also affect the use environment of properties such as railway museums and the working accuracy of precision instruments along the line, which can easily lead to the failure of electrical components and automatic control systems. Unavoidable noise will affect the work and physical and mental health of the surrounding people

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