RHEDA 2000® MFS (for installation on spring-mass systems)

As a result of increasing train speeds and greater axle loads on the rail networks of today, harmful impact from noise and vibrations has likewise increased for the areas around rail lines. This noise and vibration are caused by unevenness between train wheels and the rails, as well as by the dynamic deformation of the tracks, which take place when rail vehicles pass over and transmit vibrations into the subgrade.

One of the most effective measures against the production of structural-borne noise and vibrations is the use of spring-mass systems, in conjunction with the RHEDA 2000® ballastless track systems. The use of such systems is particularly beneficial and effective in densely populated areas that are sensitive to vibrations. They have proved successful by now in a great number of projects.

The purpose of these spring-mass systems is to reduce the vibrations caused by unevenness between train wheels and the rails, as well as by the dynamic deformation of the tracks, which take place when rail vehicles pass over and transmit vibrations into the subgrade.

These vibrations cause shocks to occur in developed areas near the tracks. In addition, they cause vibrations in the structural components of nearby buildings, which leads to disturbances from secondary airborne noise. The design of such systems takes advantage of the characteristics of the amplification function of single-mass oscillators.

Variations of the RHEDA 2000® MFS model

Light, medium-heavy, or heavy spring-mass systems are used for tracks, depending on the requirements that a certain track system must satisfy. The type of support must be selected in accordance with the particular spring-mass system being applied. If a light spring-mass system is used, then entire-surface or strip support systems with elastomer mats are often used. If heavy spring-mass systems are used, point-support systems are generally used: in the form of elastomer blocks or steel spring. Owing to the various requirements, spring-mass systems must be individually dimensioned and de-signed especially for each individual project. As a result, it is not possible to determine generally valid structural forms. The following description will provide typical solutions for the most important application cases. This does not preclude, however, that different surrounding conditions will be encountered for certain projects that will call for the required adaptations.

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TRAVERTEC is a 100% subsidiary of RAIL.ONE, Germany. We offer an extensive line of concrete sleepers and railway track systems for passenger traffic as well as freight- and heavy-haul transport.

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Example of the RHEDA 2000® MFS model, with individual point supports

RHEDA 2000® MFS model, with individual point supports