RAMS analysis of the RHEDA 2000® system

In the realisation of rail-based infrastructure, it has become increasingly important to assure conformity with respect to requirements in the areas of reliability, availability, maintainability, and safety (RAMS). These four primary components of a RAMS analysis provide eloquent insights into an entire rail system, and of its component sub-systems. Engineering statements provided by RAMS analysis are of great importance for system providers and operators of a ballastless track system - as well as for documentation and ongoing development steps. The company RAIL.ONE has performed a complete RAMS analysis for the RHEDA 2000® ballastless track system.

Conduct of an RAMS analysis has taken place in a moderated brainstorming session of a team of experts consisting of members taken from a wide variety of disciplines, as well as of representatives of the system supplier and the operator.

The first necessary step was application of a provisional risk-analysis procedure for determination and assessment of the potential hazards involved. The following step consisted of structurally breaking down the RHEDA 2000® system into its individual components and other constituent elements. On the basis of this system structure, it was subsequently possible to perform fault-possibility and fault-influence analysis. This process disclosed all the potential faults of the individual components that could arise during actual operation. The procedure, however, does not take into accounts faults that can arise from insufficient dimensioning, material faults, and production shortcomings. After assessment of the risks in the individual components, the following step was the classification of risks into critical and less critical component categories. This classification enables further insights into the system and can provide valuable assistance to the system supplier in further development. In the exercise described here, the process of conducting a fault tree analysis superposition's these individual faults.

The final step involved the performance of hazard-exclusion documentation in order to evaluate the disclosed potential risks. This step assured that all feasible dangers had been critically assessed, and that top priority was assigned to ensuring their non-occurrence.

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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.

The modular principle

Uniform track-supporting layers with low structural height ensure simplified route planning and installation. The lightweight mode of construction, with the possibility of installation by track sections, enables optimization of construction schedules. Fastening of the track to the substructure, and track regulation, with a high degree of mechanization: this saves time and money.